Comets

[glass whale]

May I add that it is a tiny comet. This is a 100% cut out, the comet is less than half arcminute across.

[lavish lark]

ah that's plenty for my one inch of ap and 180mm of fl

[glass whale]

So, the coma is 20 arcseconds across and the tail about one arcminute

[glass whale]

Meanwhile, comet 154P/Brewington is just a streak

[lavish lark]

http://www.astrostudio.at/2_Bright Comets.php?img=images/2_Bright Comets/811_2023A3_30_07_24.jpg a3 is actually having an active gas tail

[lavish lark]

13p olbers 11m exposure

maybe extremely faintly got the ion tail?

[glass whale]

Yeap, there is a faint ion tail

[velvet berry]

Does anyone know a bright comet on the north empishere?

[lavish lark]

13p olbers is 7-8th magnitude right now, in october c/2023 a3 will be a 1-3rd mag object the 12th-20th (predictions are hard)

they should both be in stellarium (and if your using desktop and its not you can add it)

[velvet berry]

Thanks

[lavish lark]

c/2023 a3 is within 1AU of the sun

neat

[icy yarrow]

How bright will it get

[lavish lark]

on the 9th it may reach like -3 or brighter but it will also have 3 degrees of elongation, on the days after its like 1-3rd mag for the 11th-15th

https://hdr-astrophotography.com/wp-content/uploads/2024/07/output2023a3_closeup.gif?w=600

(open in browser for high quality)

[icy yarrow]

Interesting

[little moon]

It seems to be overperforming again though

People are calculating it is surpassing the mag 7 threshold from the stereo footage

[lavish lark]

zamn

[lavish lark]

i wonder if a3 wont be as reported in the news as neowise, leonard ect because its name isn't catchy

[lavish lark]

i find it funny how c/2024 g3 has gotten only 1 news article

[little moon]

It does have horrible visibility conditions

[night wave]

can you cook over here @lavish lark so it doesnt get lost to gen chat

[lavish lark]

comet

[night wave]

indeed

so what i can do is choose 3 comets, make magnitudue graph for each one, image comet like 5 days later and see if it follows my predictions

also, could using the brightness and stuff give me other info? like could i try getting distance possibly? @lavish lark

[lavish lark]

yea that would work

[night wave]

yipee

[elder bay]

how are you going to calculate the mag tho

[lavish lark]

the math is like 4.00 + 5 log[∆] + 12.50 log[r]

[night wave]

could i use a reference star?

[night wave]

ooh

[elder bay]

idk i got the same question

[night wave]

ah lol

[lavish lark]

yea

you could use a reference star

unfortunately i am building a bed so i cant be much help lol

worst possible time lol

[night wave]

oh lol okay

[lavish lark]

if you crave more information about comets (in like 3 hours and later) you can just ping me

i know too much about comets

[night wave]

yipee thank you

[lavish lark]

actually what even led to the interest in comets in the first place lol

[night wave]

science project due nov 20 lol

[lavish lark]

lol

[night wave]

an i want to do something related to space but since comets arent an all night thing, i can use scope for astrophotography and project

[lavish lark]

good thing a3 is visble in october

(next naked eye comet)

[night wave]

ooh

i can do non naked eye comets also tho right?

[lavish lark]

yea

comets are just moving galaxies pretty much

[night wave]

oh yipee

[night wave]

same thing

[night wave]

would i just get like 20 mins of data for like a week and use brightness trends to makea chart?

[lavish lark]

yea probably

[night wave]

Yay. Now I just need clear nights. Any comets rn?

[lavish lark]

http://astro.vanbuitenen.nl/comets right now 13p olbers is the best one

[night wave]

Ooh thanks

[lavish lark]

a3 is at 0.7 au from the sun

[night wave]

Ooh that's close. How do we know that

[lavish lark]

math, i just checked what stellarium says for the distance to the sun

[night wave]

Ah okay nice

[lavish lark]

a3 is 0.58 au from the sun

[undone epoch]

Cool

Is it visible to the naked eye rn?

[lavish lark]

i put it at 5th mag or so but it has 13 degrees of elongation

[undone epoch]

Okey

[wild sequoia]

c/2024 l4 when (idek where I found anything abt it all I know it exists)

wait no it was l3

nope it's l5

[lavish lark]

i want @river patio dead

[undone epoch]

Then you want me dead too

Cuz i aint imaging comets

Its too complicated

[lavish lark]

im dumb as shit and understand it

[lavish lark]

yea

[undone epoch]

Okey

[gritty forge]

I won't be able of 💔

[lavish lark]

instant death

[bright minnow]

cant realy

in australia is gonna be very tricky to catch it

[little moon]

The comet has been recovered

Report of mag 5.5 by Terry lovejoy

It's probably still be below the actual brightness due to the altitude

So it's probably around 5th magnitude by now.

[lavish lark]

we are so back

abs mag of 6.1 or so id guess then

[wild sequoia]

the uk weather system:

[lavish lark]

yeah :(

[lavish lark]

skyandtelescope these arent cautious at all

skyandtelescope what are you on

[little moon]

Another observation today

Nuclear condensation is ridiculously high

Mag 4 estimation, on very small region, may I add

I'd say comet is mag 4.5-5 rn

[little moon]

They used a massive 16" (probably an SCT) scope for this one so I suppose it is more trustworthy

[lavish lark]

messed up that theres only 14 days until a3 perhelion

[jade egret]

Is the comet visible during daytime too? Since when it’s dark it’s not visible for me

[lavish lark]

not right now, maybe on october 9th though

maybe

[jade egret]

Im talking about the 12th October

[lavish lark]

no

its only 1st to -1st mag on the 12th

would have to wait until it gets higher

[jade egret]

It’s supposed to be -3 mag for me on the 12th October

[lavish lark]

what source is that?

[jade egret]

Starwalk

[lavish lark]

not accurate sadly

[jade egret]

[lavish lark]

thats not good news lol

[jade egret]

I know

[compact bronze]

cowmet

[lavish lark]

a3 is 0.5 au from the sun

[lavish lark]

yooo (heartlessly stolen from a different astro server

[wild sequoia]

they are on comet dust

I think they just want hale bopp/ the Japanese 1964 one that i forgot the name to happen again

[lavish lark]

iyeka seki?

[icy yarrow]

Senpai

[wild sequoia]

yea that one

[lavish lark]

also it turns out the reason was because the guy misread it lol

[wild sequoia]

hwar

[little moon]

Jesus Christ

Lowkey looks exactly like 2011 L4

Very impressive footage

Probably around the mag 4 threshold rn

[compact bronze]

double tail?

[little moon]

Yes, you can see two dust tails, a bright, straight one of lighter dust and a fainter, curvier one of heavier dust

[compact bronze]

oh damn

I def gotta catfch this comet

[little moon]

You should

Best one since neowise most probably

Even since mcnaught if things go accordingly

[compact bronze]

Yeah

Mcnaught is crazy

[jade egret]

C/2023 A3 is only at the end of October/start of November visible for me when it’s dark

[lavish lark]

ripp

[wild sequoia]

for me from about 15 Oct onwards

[icy yarrow]

For me it’s 19th of august 2025

[little moon]

Pretty much at optimal latitude here

If weather allows ir I will be able to get some early glimpses

[little moon]

?

[icy yarrow]

It will be visible for me then

[little moon]

That's uh

Very late

It will just be a faint telescopic comet by then

What's your latitude

[icy yarrow]

69

[little moon]

North or South?

[icy yarrow]

50/50

Sorry man

I am jk

[little moon]

Oh

Yeah the comet won't be visible there

Really sucks for ya

Okay jokes aside it should be visible pretty much anywhere from Oct 13 onwards

[lavish lark]

ok imma go to the south pole to see it then, thanks!

[wild sequoia]

it's gonna be polar day by then

cance*

bruh

chance

[lavish lark]

yea thats the joke lol

it also isnt even above the horizon

[compact bronze]

lmfao

[compact bronze]

what abt 37 deg

will I see it?

[little moon]

Yes

Pretty well

[orchid inlet]

I might get a glance at it on 2nd of October

or not cuz I'll have school

[little moon]

2nd october is rough

Try a few days before

[orchid inlet]

I will

but idk if the weather will be on my side

[little moon]

Yessir

[orchid inlet]

beautiful

anyone's knows if 2024 PT⁵ will be visible?

and if so, how can I find it,

?

[little moon]

Yeah, more Gerald rhemann stuff

[little moon]

That's an asteroid

So idk

[orchid inlet]

I mean ir will be pretty close

[night wave]

@lavish lark any comet up rn that I can image? Got clear skies tonight

[lavish lark]

13p olbers should still be visible quite low in the somewhat south, like 9th mag or so

c/2023 a3 should be low in the southeast horizon during dawn by the end of the week

(by low i mean like 5 degrees, maximum)

[night wave]

Ah okay thanks I'll try to cook

[night wave]

As sun sets?

[lavish lark]

yeah evening astrodark

also 13p is 10.4th mag instead of of 9th, oop

[lavish lark]

you actually have a far better c/2023 a3 morning passage than me, 6 whole degrees above the horizon with the sun at -11 degrees instead of my 2

[night wave]

Ooh

[night wave]

I can try getting data on it, then imaging something for the night

[lavish lark]

*this is on the 27th

[night wave]

Ohh okay lol

[compact bronze]

YOO

[bright minnow]

might shoot today

what fl should i use?

[little moon]

Depends

Are you on the south or the north?

[bright minnow]

south

[little moon]

Ah, well

Any focal works

Depends on how you want your image to look like

If you want to do landscape I'd reccomend a lens between 35 and 85mm

If you want to capture the comet only, go higher

200mm at least

[bright minnow]

Ok I’ll probs do 300

[little moon]

Okay

Have this one from this morning

(Not mine, from Gerald Rhemann)

[bright minnow]

oh its looking good

that dust tail is forming nicely

[little moon]

Yeah

The one it had before august is quite faint now

And it will probably dim more and more

Simce it's heavy dust from the surface

[bright minnow]

@little moon

6s sub

[lavish lark]

presuming you took several?

[bright minnow]

yeah

[lavish lark]

was slightly worried you only had the one lol

[bright minnow]

lol

[little moon]

Ohh sweet

[bright minnow]

not naked eye visable from my location tho

[little moon]

Fair

Very low altitude

[bright minnow]

10"

[bright minnow]

23/09/2024 5:01 AM

[lavish lark]

what timezone?

[bright minnow]

Australian eastern standard time

[jagged valley]

How much brighter will C/2023 A3 get?

[lavish lark]

if you count october 9th, 7.5 magnitudes brighter

*3 degrees from the sun on the 9th

[jagged valley]

In just praying for clear nights

[lavish lark]

real

[jagged valley]

Istg ill just buy time on a remote telescope if not lol

Or go up a mountain/drive inland

I'm not missing this

Especially in October

I've seen 3 comets so far

ZTF, Pons Brook and C/2023 A3

I saw A3 back in May though, when it was mag 10

[wild sequoia]

damn I've only seen 12p

[wild sequoia]

morning passage what's thar

[lavish lark]

if you count both photgraphy and visual ive seen 8

neowise, c/2023 h2, 12p, 62p, 144p, c/2021 s3, 13p, c/2023 a3

[cyan oriole]

I've seen none thus far 💀

[lavish lark]

skill issue fr

[jagged valley]

Just aim your scope at the dim ones fr

There are something like 5 mag 10 to 13 comets at any given time

[cyan oriole]

well that'll be just a dot doe

[jagged valley]

Not always

[cyan oriole]

huh?

[jagged valley]

I've yet to image the dim ones, hence I've only imaged 3 comets

[jagged valley]

The mag 11 and 12 ones sometimes have small tails

[cyan oriole]

huh, then I defo gotta look into those

[jagged valley]

Yeah

[cyan oriole]

how high up are they? the brighter ones tend to be quite low, and unfortunately the horizon at my telescoping spot is not the greatest due to trees

[jagged valley]

They're usually out at 2 au from the sun

[jagged valley]

All over the place, sometimes at Zenith

They're past mars

So they can be anywhere

[cyan oriole]

that's great, defo looking into that whenever I get the opportunity :p thanks!

[lavish lark]

2025 is actually somewhat low in terms of bright comets

[lavish lark]

https://www.aerith.net/comet/future-n.html large portion of the year theres no comets below mag 13

[lavish lark]

how much focal length do you have?

[lavish lark]

oh your fine

i resolved a 12th mag comet with 180mm of fl

i mean it was small

but it was there

[cyan oriole]

yeh, gonna be like this once I get that 585, should be neat :p about as far as my scope can go really in terms of pixel per fov any further and I'd start oversampling

[little moon]

I've seen 5

Neowise, Leonard, C/2017 K2, ZTF and Nishimura

[tall crane]

I’m on 4

Leonard, ZTF, C/2021 S3 & C/2023 E1

[compact bronze]

I've seen 3

Pons Brooks ZTF and that other one

Olbers

[tall crane]

#1230216213901082744 message

[jade egret]

Is there any comet which isn’t near the horizon and is currently ok or good visible?

[lavish lark]

theres a few ok faint ones

[lavish lark]

https://hdr-astrophotography.com/wp-content/uploads/2024/09/tsuchinshanatlas_zoom.gif?w=800 it got updated!!!

*open in browser

https://hdr-astrophotography.com/wp-content/uploads/2024/07/output2023a3_closeup.gif?w=600 the old one for comtext

[hoary mauve]

2023 A3 this morning

@lavish lark

[lavish lark]

hell yeah

[hoary basin]

I should be able to get c/2023a3 Thursday/friday and Sunday

Sunday should be almost st it’s brightest roughly

[compact bronze]

that looks really good

[compact bronze]

COMETT

[lavish lark]

i did not make it

[compact bronze]

wdym

[lavish lark]

i thought you thought i made it lol

[compact bronze]

oh 💀

[jagged valley]

Wow

[worthy steppe]

Woaaaahhh

[versed jasper]

Can someone link a good tutorial for comet astrophotography? Or is it like regular planetary/DSO? I don't have a clue

[lavish lark]

its about the same in terms of acquisition to like a galaxy, only difference is that you have to use the comet mode in your stacking program of choice (dss is easiest)

*unless its a bright naked eye comet (like c/2023 a3) in which it is widefield

[versed jasper]

A balaxu? You mean a galaxy?

[lavish lark]

galaxy*

i should really check what i say before sending it

[versed jasper]

All good, thx bob

[hoary basin]

I'll post a better picture once I get internet

With the roki last night

[compact bronze]

comet's gonna pass soho spacecraft

[compact bronze]

what camera

[hoary basin]

585

[lavish lark]

for several days most likely

[compact bronze]

for 3 days

[compact bronze]

and it still fit ur framing??

I was worreid the entire comet wouldnt fit my roki 135 and 533

[hoary basin]

Ya

[compact bronze]

oh im chilling then

do you think 1 minute subs are ideal for the comet

since its moving fast

[hoary basin]

1 min is almost to long cuz it will clip it white

[compact bronze]

not really

[hoary basin]

The comet is moving towards us Rn so no motion relative to us

[compact bronze]

yea but during the 13th

[hoary basin]

I tried last night this comet is very bright

[compact bronze]

oh

45 seconds?

idk ill see during that day

[hoary basin]

Istg it better rotate and reveal the ion tail cuz it's annoying that it'd hiding it :/

[compact bronze]

im gon shoot 13th cuz thats when the comet's tail is curved

LEGIT

we get antitail but still

[hoary basin]

I might check out that date

[compact bronze]

yea

did u see the tail animation gif?

[hoary basin]

Ya

[compact bronze]

yea it looks dfire

whty is ion tail hiding tho thats annoying

[hoary basin]

Roughly looked like this in the dob eyepiece

Bit dimmer and comet nucleus was alot smaller

[compact bronze]

why does it look so gradienty

dbe it?

or graxpert

[hoary basin]

Picture with my phone of the screen cuz I got no internet

[compact bronze]

ohh

[hoary basin]

Got my internet back, here are the better ones on my computer

[lavish lark]

6 HOURS UNTIL A3 PERIHELION (or maybe 7 hours)

[hoary basin]

wait what

brightest is still 9th October ?

[lavish lark]

yea, it actually continues to brighten until then

[hoary basin]

i could shoot it again tonight but i cant really be bothered

[lavish lark]

lol

[hoary basin]

meh i might try on Monday

[versed jasper]

@lavish lark can you use nina to track the comet?

[lavish lark]

probably? i dunno i dont use it

right now its not moving very fast though

[eternal talon]

NINA has some plugins for asteroids; maybe it works for comets. But PHD2 has a tool for guiding on comets...

[versed jasper]

you have to be PA'd before using it right

[versed jasper]

thx

[lavish lark]

(stolen heartlessly from a different discord) official CBAT (Central Bureau of Astronomical Telegrams) estimate of C/2023 A3 (Tsuchinshan-ATLAS) magnitudes as it reaches perihelion and experiences forward scattering:

(Forward scattering is a phenomenon that exists when a dusty object is between us and the Sun - so the intensity of it is directly correlated to how close C/2023 A3 is to the sun.

October 5: magnitude 0.0 (15 degrees from the sun)
October 6: magnitude -1.0 (13 degrees) (peak magnitude of comet Hale-Bopp at a high solar elongation)
October 7: magnitude -2.0 (10) (peak magnitude of comet ISON)
October 8: magnitude -3.0 (6.6)
October 9.4: magnitude -4.0 (3.5) (peak magnitude of comet McNaught in 2006 in the far south was -6)
October 10: magnitude -3.0 (4.3)
October 11: magnitude -2.0 (7.9)
October 12: magnitude -1.0 (12)
October 13: magnitude 0.0 (17)

The comet will experience forward scattering between September 29 and October 21, although the intensity of this will only brighten the comet by >1 magnitude between October 2 and 16.

[wild sequoia]

istg if it clouds up for two weeks in October

[gritty forge]

I might shoot a3 this morning

[icy yarrow]

How good will it be visible at 47 degrees Latitude?

[gritty forge]

Wasn't able 😭

[hoary basin]

New comet discovered by atlas

Gonnw be a very very sun grazer and likely mag -5 /-10 at the least, perihelion is on the 28th October

But basically on the sun

[wild sequoia]

iyeka seki part 2 real

[hoary basin]

apparantly its part of those group of comets

Tis the post on R/ap

[wild sequoia]

damn
I knew there is a group of comets from ikeya seki but I didn't know I'd guess it was one 😭
(istg if its cloudy then too)

[wild sequoia]

btw what's its name
like what did atlas name it

if they've named it yet

[hoary basin]

dont think they have yet

[wild sequoia]

oh ok
gonna keep up on this comet as well as a3

[tawny elm]

this thread gonna get halla more active

#570687129118703637 message

ANOTHER ONE

[hoary basin]

i already posted it

[bright minnow]

Great comet ?

[hoary basin]

hopefully

[bright minnow]

Hopefully is visible from the southern hemisphere

2023A3 isn’t the best comet for southern hemisphere

[hoary basin]

its better for us before perihelion but north gets it better after perihelion

80% of the images that exist of A3 rn are from australia iirc

[bright minnow]

lol

[bright minnow]

I’m just waiting for another lovejoy

[tawny elm]

deets about it

[bright minnow]

Made a graph

[bright minnow]

Super naked eye visible

Shot from a iPhone

[bright minnow]

C/2023 A3 this morning at around 5am aest

[compact bronze]

-4??

[lavish lark]

you know how dust in a window gets brighter?

the same thing happens

[compact bronze]

yea

ohhh

forward scattering?

[lavish lark]

yea

[compact bronze]

w

[bright minnow]

Sadly tonight’s probably the last night I can shoot A3

[lavish lark]

rip

[bright minnow]

As it becomes a northern hemisphere target

[lavish lark]

it should be about as high though

[bright minnow]

During the day

Yeah

[bright minnow]

October 9th

[lavish lark]

well yeah but after the 9th is when its visible in the evening

[bright minnow]

16th ish

[lavish lark]

i mean 4th mag at 6 degrees above the horizon (random point in aus on the 18th) isnt particularly amazing but it is most certainly possible

*astrodark

[bright minnow]

This was my shot tonight

[jade egret]

WHAT

[wild sequoia]

DAMN that is a long tail

[wild sequoia]

12 and 15th for me
14th or 15th is when I'll start taking pictures probably

[gritty forge]

I'll try to shoot it next morning, today was a big fail

There were clouds and the sun was already almost out

[tawny elm]

am or pm?

[hoary basin]

That seems way way higher then when I got it only 3 days ago

[hoary basin]

Can’t shoot it in pm atm so def am

[lavish lark]

yea its about the highest it gets for the southerners

[bright minnow]

My bad

[dawn crescent]

C/2023 A3 with sunrise ☄️

[undone epoch]

So it gets that high even tho in stellarium it shows that its not going to be very high?

[little moon]

I love how almost everyone is ignoring this lol

That is nuts

Hopefully we get a nasty bright comet

[dawn crescent]

Focal length and cropping should have affected the way we comprehend it's height

here's the raw file at 28mm (fullframe)

[undone epoch]

Now it makes sense

[bright minnow]

C/2022 e3. (ZTF). From early last year

Next to mars

[hoary basin]

I was also looking back on my ztf and Mars data lmao

When I was even worse at processing somehow

[bright minnow]

that image was my first ever astophoto

like ever

[little moon]

Okay so people are starting to confirm that it's a Kreutz comet

This may turn into an absolute frenzy of hype in the next few days

[lavish lark]

c/2024 g3 cant get a single win 😭😭

[lavish lark]

A3 HAS BEEN SPOTTED

(bottom left corner)

A3 HAS BEEN LOST

[proud dew]

Guys a new comet just dropped
https://groups.io/g/comets-ml/message/32622

[tawny elm]

yes

[tawny elm]

it was discovered last night

[proud dew]

do i understsand it right?
it will be closest to the sun at Oct 28
and was the furthest at Sep 28

[hoary basin]

Better for southerners pre perihelion

[lavish lark]

a3 from an hour and 40 minutes ago

[bright minnow]

thats pretty soon

didnt we have to wait like 5 months for A3

30 days is crazy

[hoary basin]

Tho considering it’s gonna be in October I’ll get like 2 clear nights cuz of storms

[bright minnow]

im just gonna pray

woah thats gonna get close to the sun

jeezus

no way in hell thats surviving

[proud dew]

the 0.005 AU? im tring to figure out how to decode the orbit spec

[wild sequoia]

if it fragments which it probably will then that'll be fun watching each fragment

[little moon]

It's a kreutz sungrazer after all, if comets are a wheel of fortune, kreutz comets are that but 10 fold

Most do survive the perihelion and have partial disintegrations afterwards

Even ikeya seki split right before perihelion and still gave quite the show

I'll just hope for a partial disintegration at most

[proud dew]

i can't wait for the weather to completly fuc this up for me

[little moon]

A total one would suck

Like lovejoy in 2011 or the headless beauty of 1887

[little moon]

Lol

[bright minnow]

what would that even look like

[wild sequoia]

maybe a bunch of comets similar brightness to pons Brooks back in March, but in a stream going up from virgo to ophiucus?

[gritty forge]

About a year

I heard about it like may 2023

[bright minnow]

It’s crazy that this new comet that was discovered yesterday will be at perihelion in like 30 days

And gonna be possibly brighter then 2023 A3

[little moon]

Almost 2 in fact

A3 was discovered in January 2023

[wild wadi]

i eat comets

[lavish lark]

real

[little moon]

Here is the kreutz in color

Michael Jager says mag 11.5

Compare it to Lovejoy from 2011

[steel widget]

Woah, is the A3 visible for the naked eye yet?

[bright minnow]

Absolutely

Was just shooting it

Super naked eye visible lmao

[steel widget]

awesome

[steel widget]

gotta pray the weather is in our favour

[wild wadi]

oh man i love this one

[steel widget]

oooo what bortle

[wild wadi]

i actually love the composition of that

[bright minnow]

4 although it shouldn’t matter to much

Due to the sunrise

[steel widget]

and integration time? :oooo

looks sick btw

[bright minnow]

Single 30 second sub

[steel widget]

!!!!!!!!!!!

[bright minnow]

This is my 4 minute stack

[wild wadi]

is this zoomed in or is this true scale?

[bright minnow]

True scale:)

[wild wadi]

i thought it was a tiny little dot lol

[steel widget]

what FL?

[bright minnow]

135mm

[steel widget]

omg this actually might be doable for me

[bright minnow]

This one is 55mm

[wild wadi]

wait so did u shoot widefield or with a scope?

[bright minnow]

Wide field. Just me and my trusty lens

55-250 kit

[wild wadi]

damn thats insane, i didnt realize it would appear that big in the sky in a widefield

[bright minnow]

I measured around 5-7 degrees

[wild wadi]

im screwd my phone shoots 87 degrees

[bright minnow]

In the span of 1 day. It’s brightened a whole bunch

As I was also shooting yesterday morning

Comparison

Same fl

[orchid inlet]

wow

when will it get too close to the sun?

or better to ask when is the best period to shoot it

like what day, in your opinion

[bright minnow]

It’s already had its perihelion yesterday

It will continue to brighten tho

[steel widget]

stellarium shows it slowly fading away around 16th october?

[bright minnow]

The best time to shoot depends highly on location

[orchid inlet]

I got lat 45°

in the middle of the n hemisphere

[bright minnow]

Correct. Keep in mind Stellarium sucks at comet magnitudes. It’s usually quite off with its predictions

[steel widget]

i better hope so 🙏

[bright minnow]

I live in the south so you will have to do your own research

[orchid inlet]

oh ok

[bright minnow]

It is dimming tho. It got that part correct

[steel widget]

ah shoot

[bright minnow]

Don’t worry tho. A new comet was discovered yesterday It’s predicted to outshine this one by a whole lot

It’s a little too early to tell for sure tho

[steel widget]

:ooo

[bright minnow]

Currently it’s being compared to comet lovejoy from 2011

(Lovejoy for reference)

[steel widget]

so pretty

[compact bronze]

its gonna look lik that prob

cant see the green part of the core

[bright minnow]

Keep in mind it’s still much to early to know anything with certainty so take everything I say with a grain of salt

[compact bronze]

we just need 2 weeks and trus in forward scatering to give us the brightest comet

[bright minnow]

lol

Fingers crossed

[compact bronze]

if comet melts im blowin up the sun

[bright minnow]

Haha

Better term would be vaporised

[compact bronze]

vaporise the sun (the planets are cooked )

[bright minnow]

Btw tmr marks the 1 year anniversary of me starting astrophotography!

[compact bronze]

SOHO space craft better get a good image of the comet

[compact bronze]

ayyyy w

for me its 3rd year

approaching fourth year

in 2 weeks

[bright minnow]

1 year progress

[compact bronze]

woah

leme pull up my moon

this is one of em

[wild wadi]

or we could manipulate the comets orbit to send it towards earth so we can get a nice close up view of the comet :)

[compact bronze]

bro r u tryna get us destroyed 💀

[steel widget]

one of mine as well :p

[wild wadi]

im so curious how you do moons like this

[compact bronze]

nwerd wroerty

[wild wadi]

i can never get the shadow side to show any detail even with overexposure and long exposures

[wild wadi]

ahem.. mininerd worthy

[steel widget]

i wish 😭

[compact bronze]

regular moon stack and brightened up moon

and then alignning

[compact bronze]

shit my bad I forfgot about

MININERD

[steel widget]

secret is to get a full moon shot adn then underexposure it in photoshop

[wild wadi]

mininerd > nerd

[compact bronze]

this was my best one

[wild wadi]

lowkey looks like a drawing

[compact bronze]

background is my nikon d7000 and moon is from seestar s50 from someone else

[compact bronze]

yea lmao

[steel widget]

omg i should def try getting more moon/cloud shots

[wild wadi]

is the moon centered in tht shot tho

it looks like its a little to the left

[steel widget]

weather is cloudy when i dont need it to be and vice versa 😩

[wild wadi]

its kinda painful

[compact bronze]

yea

[compact bronze]

yea uhhh we dont worry about that

[wild wadi]

im worried about it it hurts me physically

and mostly mentally but yknow

[compact bronze]

[wild wadi]

who is this a picture of i really wanna know lol

[compact bronze]

rory with cracked skull?

I cant tell what it is 💀

[gritty forge]

Right now

[little moon]

Yep a kreutz comet

[little moon]

It actually seems to be rather large compared to lovejoy

No as big as ikeya but yea

Actually I'd say it will be more like ikeya than lovejoy

Just fainter

[hoary basin]

the comets Ion tail is getting brighter

[lavish lark]

so sad, it actually has gas in it

we lost a real one (the concept of c/2023 a3 having only dust) today

[proud dew]

Why would it be better if there were no gas?

[brazen sonnet]

Whats the name?

[tawny elm]

name is not public

its going to be called "C/2024 S1 (ATLAS)"

if you look it up now, it wont come up with anything since its not yet public

[orchid inlet]

ok, but I got hurricane asley rn, so ....

[compact bronze]

another atlas comet dang

[wild wadi]

2024 a wild year

esp for me i just got my first ever room in 17 years

[compact bronze]

Real

Random comets monthly .pdf files and hurricanes

[wild wadi]

and its an election year which adds onto the craziness lol

[compact bronze]

Yea lol

[lavish lark]

a3 has broken the 2nd mag barrier*

*approximately

*if it hasn't yet it will in like 12 hours

[tawny elm]

have you seen PANSTARRS?

[compact bronze]

yes no

[hoary basin]

hm

honestly im not 100% sure i believe it

hm the ion tail is getting significantly brighter maybe it is real

[icy yarrow]

Is this your image?

[tawny elm]

its from facebook

[icy yarrow]

I am from Mars

[compact bronze]

wheres the GREEEEEEEEEEEN

-- news probably

[tawny elm]

SCNR'd

[compact bronze]

lmafo

[lavish lark]

altitude graph for a3, very useful

[compact flare]

Can i shoot this current commet at b9?

[lavish lark]

should be possible but faint and low

[compact bronze]

at 17th itll look crazy with just tail and anti

star walk 2 shows the comet as small on my screen 💀

[lavish lark]

should be 2.5th mag or so by then

[compact bronze]

still good enough fgor shooting

idc as long as it isnt below 6

[undone epoch]

Imma wait for mid october to image it, too low for me

[compact bronze]

wait for 17th

[lavish lark]

the 17th has a nearly full moon though

[hoary basin]

Last night

Still trying to add the 3rd panel to the 1st Image

[compact bronze]

are those all sattelites

[compact bronze]

ur all the way on the other side of the sky

[lavish lark]

it would still affect things?

[compact bronze]

whats that

I process out the moon's effects

[lavish lark]

what about visual

[compact bronze]

I aint a comet visual kid

[lavish lark]

*and it adds more noise

[compact bronze]

fine ill do 16th ig 💀

[icy yarrow]

There‘s actually this really cool software which can do that, it’s only 500$ too

[compact bronze]

I dont need to worry about noise

[lavish lark]

lame, become one

[compact bronze]

my sensor is extremely sensitive + f/3

[compact bronze]

only if I can see it

[lavish lark]

it would be 2.5th mag or so, so should be easy unless your in like b9

[compact bronze]

im in b5

whats brightness on 13th

[lavish lark]

0-0.5

[compact bronze]

oh easy to spot

[lavish lark]

the gif of not quite infinite but very large amounts of knowledge is very useful

[compact bronze]

yea IS aw irt

I saw it

[graceful bay]

That tail is insane

It clearly extends outside this frame

On the right

[lavish lark]

the tail simulation isnt far off even

[graceful bay]

Its dim but the tail extends so far

[lavish lark]

dibscord why display images so bad

[hoary basin]

I have a whole other panel taken up by the tail that I gotta process

[hoary basin]

Pretty epic

When I get back from work I'll give it a proper look

[static sage]

[static sage]

[static sage]

[orchid inlet]

what other comets there will be in the next 100 years (I'll miss this one fs)

[lavish lark]

a lot dont worry

if you average it out there's a pretty cool one every few years

*dont know the actual statistic off the top of my head

[orchid inlet]

oh ok

thanks

[compact bronze]

Is this symbolizing you downloading the image

[proud dew]

also the newly discovered one is gonna put on quite a show if it works out as predicted, it's due in about a month

[orchid inlet]

damn so many comets

[orchid inlet]

do you know it's name?

[proud dew]

well i had it somewere give me a min

[lavish lark]

c/2024 s1

[orchid inlet]

thanks

[lavish lark]

Hopefully with s1 getting confirmed we get a better idea of how bright it is right now

estimate range from mag 11 or so to mag 16 or so

[orchid inlet]

well stellarium is not seeing it

[proud dew]

im talking about A11bP71
unless it's the same one

[lavish lark]

same one, it got confirmed

[lavish lark]

what version?

[orchid inlet]

ooh ik ab that, I've seen an insta post

[orchid inlet]

idk, the regular phone stellarium

[lavish lark]

ah it just hasn't been updated yet

should happen in a few days

[proud dew]

usually there is more stuff on PC

[lavish lark]

maybe a week at most

[orchid inlet]

ok great

[proud dew]

im checking right now

I don't see it, it doesn't popup when searching for it

[lavish lark]

you have to add it

[orchid inlet]

oh

[lavish lark]

*in the desktop version

[orchid inlet]

bruh why do all comets got to be where the sun rises

there are some tall buildings right there

[tawny elm]

shouldve imaged it a couple months ago when it was in virgo

[lavish lark]

yea

[proud dew]

get on top of the tall buildings i guess

[orchid inlet]

firstly I will have to pray to not get caught by police or homeless people

[static sage]

enjoy the pain

[little moon]

Get out of any light pollution, as much as possible

Idk why ppl try to see comets from cities

I only saw neowise from a bortle 2 and visual almost matched images

(Except for the gas tail)

[proud dew]

in europe it's not that easy to get out of light pollution, best skies are usually ~2h away and they end in B5 sometimes B4 and that's looking strait up, close to horisont the sky is lit up anyway.

and the atlas comet is so close to the sun the Brotle class doesn't matter much

it will matter in 2 weeks when the comet will be setting a bit AFTER the sun sothe sky will actually have a chance to get dark enough bor the sky class to matter

[orchid inlet]

1h b3 for me

[lavish lark]

it does matter after like the 13th though

because by the 14th its more than 5 degrees above the horizon after astrodark

[little moon]

Any ammount counts, trust me

[little moon]

Yea

Specially when the moon goes away

[lavish lark]

yeah the 20th in a b1 would probably be a stunning sight

*for like 20 minutes until the moon rises

[proud dew]

well the moon is gonna be there at the same time as the comet but on the oposite part of the sky so not super terrible

[little moon]

Yea

[little moon]

Can confirm

On July 17th I could only see neowise as a small thingy from a bortle 5-6 village

But a day later feom the bortke 2, the view was breathtaking

[lavish lark]

saw it on the 12th, it kinda sucked lol

[proud dew]

on the 13th the separation between sun and comet is 2h, sun sets and the comet sets 2h after it

[little moon]

It did suck in the morning

Like early july

But mid-late july from dark skies was just sublime

Something I always dreamed of

[proud dew]

god damnt, i was suppose to study for the exam tomorrow not plan my next astrophotography trip

[lavish lark]

sowwy :((

[proud dew]

i love and hate this hobby at the same time

[lavish lark]

(you can do it after the exam, you have until like the 9th to have plans being prepared)

[proud dew]

it's not your falt

[lavish lark]

lol

[proud dew]

i know but im exited now

[little moon]

Fair

[lavish lark]

the 12th and 14th are also looking pretty good i think

[little moon]

Do you have any chance with the sungrazer?

I'd say 14th onwards

[lavish lark]

the 12th would have similar viewing to neowise when i saw it and be 2 mags brighter (approximately)

and thats preddy cool

[proud dew]

to bad that weather will mess with us

[lavish lark]

14-16th is probably what il steer normal people to see though

[lavish lark]

WHAT HAVE YOU DONE

YOU JINXED IT

THE ENTIRE WORLD WILL BE CLOUDY

[little moon]

Eh fair

[lavish lark]

actually i guess jinxing it would mean the entire world would be clear

[little moon]

But 14th will have it at mag 0.5-1 under good conditions

[proud dew]

im looking at windy and it's not looking great

[lavish lark]

yeah thats probably the more impressive sight

[proud dew]

that's as bright as mars, that's incredible

[little moon]

I still think the best will be on the 16th

Mag 2, and a long tail

[lavish lark]

yeah but the nearly full moon

[little moon]

For me, a faint, large comet is better than a small, bright one

[lavish lark]

it would be in the opposite side of the sky but still

[little moon]

Other side of the sky

[lavish lark]

i dont think the difference is as large as you think it is between skies

*i have not checked

[little moon]

It is also an issue on the 14th anyway

Forward scattering is going as expected

[proud dew]

the y axis is magnitude?

[little moon]

Yes

[proud dew]

it's all over the place, why would it be so unstable? is it just mesurment error or could it be an indication of it revolving or something

[little moon]

Meassurement errors

The comet has become very large

[proud dew]

it's too random to be coused from a revolwing motion, maybe it's just bracking apart and burtsts of dust make it brighter

[proud dew]

oh

[little moon]

And it's foing back into the sun's glare

So meassurements tend to be uncertain

Most are visually comparing the head with Regulus, though

So that is mag 1.5

[proud dew]

how does one mesure magnitude of an objet

just snap a photo and comapre to others?

[little moon]

Kind of

[hoary basin]

siril refuses to open it lmao

[hoary basin]

not sure if i 100% like it or not yet, Ion was faintly in the data but i used gimp to stretch that part of the image more but ik it does look a bit tacky

think ill leave it there anyway

[tawny elm]

is comet A3 naked eye?

planning on going out in the morning to see it

ive heard reports the tail is...i dont my mother is and she is interested

[static sage]

dev version might be more forgiving

[compact bronze]

near october time

itll be mag 0

in 2 weeks

[hoary basin]

easily yes

ill try recreate it

[hoary basin]

roughly looks like this from where i was

[tawny elm]

YOOOOOOOOO

what time did you take the photo

@hoary basin

[hoary basin]

Which one ?

[steel widget]

Is it naked eye visible even during sunrise??

[hoary basin]

Ya

Was visible till about 5mins before the sun was above the horizon

[tawny elm]

the one you posted above

[steel widget]

Dammit, comet isn't high enough in the sky for me before sun rises 😩

[hoary basin]

like 4:50am on the 1st October

[tawny elm]

alright thanks

[wild sequoia]

same, it rises at such a shallow angle to the sun for me rn

???

[compact bronze]

It's close to the sun now

[wild sequoia]

that's G3 not A3

[compact bronze]

Why you looking at g3 😭

It's next year

WAIT IT'S ACT COMING SOON 💀

[wild sequoia]

I was just scrolling through atellarium mobile bc boredom and wanting to see funni cometa from b7 (seen pons brooks)

[compact bronze]

Ohh

Well that's a new comet that got discovered last week

I need to find the orbit of this

[wild sequoia]

not like I can see it anyways

[compact bronze]

You can

Not RN

[wild sequoia]

After perihelion it stays at a weird angle to the sun

[compact bronze]

Are you moving dates to see that

We don't know the orbit yet fully

[wild sequoia]

idk I'm going off this (stellarium)

this is just two days after the first ss

3 days*

[compact bronze]

Just learned that this is a summer comet

I mean Southern hemisphere

bs 💀💀💀

[wild sequoia]

that explains why my 53N ahh can't see it

[compact bronze]

Now I'll screw up the comet's orbit and make it hit us

[compact bronze]

I'm at 37N lol

[wild sequoia]

wahoo

[compact bronze]

woohoo

[wild sequoia]

virgo sets horizontal for me 😭
any evening object in virgo from July to like December is a nogo for me

[compact bronze]

Is this current comet good for you

[lavish lark]

g3 sucks anyways lol

actively seeks out the sun

[compact bronze]

If this comet gets a negative mag I'ma punch you

https://tenor.com/view/cat-scream-gif-9259936078829692831

[compact bronze]

Real

[lavish lark]

it is never brighter than 10th mag when above 25 degrees of elongation

[compact bronze]

Bruh 💀

[lavish lark]

dont worry it will (probably) fall apart beforehand

[compact bronze]

Good

[lavish lark]

if it does survive it still sucks lol

[little moon]

Yea

G3 will be a great comet only for SOHO at most

People should really focus on S1

It's a frickin' Kreutz, ffs

Not common to find a large one at all

Even larger than Lovejoy

[lavish lark]

*unless its just had an outburst and isn't actually all that bright

*even then its still cool

*and better than g3

[little moon]

All kreutzs are cool lol

And this one seems like it is steadily developing

For one, the tail has doubled in size

And second, brightness estimates are slowly comong together

[hoary basin]

What’s c/2024 g3 ?

[lavish lark]

14-15thth mag or so sunskirter (not a sungrazer)

it kinda sucks in every way

[hoary basin]

When hale bopp but the southern version

Mcnaught nvm

[compact bronze]

scam news

@lavish lark

[hoary basin]

it is visible in the day

well A3 is now

C/2024S1 should be aswell

[lavish lark]

that one might be? maybe??

[lavish lark]

*with telscopes

[hoary basin]

still counts

[river patio]

I will try to see it on 11th october. Maybe it's still bright

[lavish lark]

messed up how theres only 5 days until October 9th

[tawny elm]

whats happening october 9th

[lavish lark]

a3 gets really close to the sun and forward scattering makes it -4th mag or so

[compact bronze]

you sure it's -4

[lavish lark]

added the "or so" since it might get only to like mag -3.5 on pessimistic predictions or like mag -4.5 on the most optimistic.

im guessing mag -4 max but i cant really say anything more than that

[compact bronze]

Well look at the data chart lol

[compact bronze]

Max will be at least -2 or -1

[lavish lark]

i have been

[compact bronze]

no way it's going up to -4

Nah this shit is exciting

I'ma start practicing my framing 4 days in advance

[lavish lark]

http://www.cbat.eps.harvard.edu/iau/cbet/005400/CBET005404.txt has it going to -4 lol

*i am scared of data like that

[compact bronze]

Are they plotting the data every damn day

[lavish lark]

no but its predictions have help up so far

[lavish lark]

of

[compact bronze]

the blue is plotted data

[lavish lark]

yep

[compact bronze]

yea

thats what I was asking

[lavish lark]

the graph and the link are different with entirely seperate predictions

[compact bronze]

dang

i trust harvard data more

[hoary basin]

thats a long tail

[lavish lark]

a3 is displaying a new feature, i dont trust it

[hoary basin]

wdym dont trust it ?

[lavish lark]

its new and weird

didnt appear in an image (posted on astrobin) 2 days ago https://app.astrobin.com/search?p=eJy7GVeSWlFiq2rupGpkVJaYU5oKpFWNHYFksqqRm5GBkbGqkUGiMUjUyBlI5iaWJGeEVBYg1Dn6%2BIDY5i5qBYnpqbaGYCo4swrINDAAABMTGnA%3D&i=ewbvsh

[hoary basin]

hm

[lavish lark]

something is releasing dust

that wasnt doing so before

[undone epoch]

Idk i think that its not going to survive when it goes close to the sun but we will se

[lavish lark]

it is already past perihelion

that was on the 27th

[undone epoch]

Wait

Ohhh

[undone epoch]

Bruh i thought thats on the 12th

[lavish lark]

thats closest approach to earth

this comet has too much damn nuance

[undone epoch]

This comet is overhyped tbh

Barely saw it with my naked eye

Really low to the horizon

[lavish lark]

thats because the morning approach is bad for people in the northern hem

(at least in terms of altitude)

[lavish lark]

the evening approach(october 12th-30th) is far better

(the "news" articles calling it a great comet are wrong though)

[little moon]

Yea

More like a good comet rather than great

[lavish lark]

decent

[little moon]

Maybe great for the south but that's about it

People could see 25degs of tail during these days

[lavish lark]

i dont think it qualifies though due to being visible like a week

[little moon]

I mean

Don't kreutz comets kinda do that too

[lavish lark]

yea ig

[lavish lark]

and most of that week sucked

[compact bronze]

after it comes to earth its the northern hemisphere's comet

[little moon]

Ruined by the moon

By the time it goes past full moon the comet will be mag 3.5

So yeah

South almost got to great comet status thanks to tail length, but here the moon is ruining it all

[river patio]

I think I caught it this morning without knowing. It wasn't visible to the eye and I didn't have binos. Is it that spot on the lower left?

40N lat ass photo

[hoary basin]

Wrong u guys just gotta wait a bit longer till mid October then it will be so much better

[little moon]

Moon will ruin it all

At least visually

[little moon]

That's definitely it

[little moon]

It appears over STEREO too btw

May just be into the negatives unlike some say

Definitely around mag 0 at the very least

[jagged valley]

This has been the best comet I've seen in my entire life

[little moon]

Looks very nice

Not close to topping my account with neowise though

Hopefully that changes soon

[little moon]

I like how condensed the nucleus is though

[lavish lark]

yep thats it

[icy yarrow]

What latitude?

[river patio]

Lowest I've ever astrophotographed

[compact bronze]

the music caught me ff guard

comet coming wee

[lavish lark]

thankfully it gets much higher after october 9th

[compact bronze]

yea

[river patio]

Clouds are gonna mess my week. I think my only options to see and image will be 11th to 13th

[lavish lark]

rip

[lavish lark]

in the 11th it would be much lower in the west after sunset but 2 mags brighter, the 13th is likely the better option

[little moon]

🥹

I miss the scattering peak but oh well

[lavish lark]

🤓 perihelion was the 27th, your missing the closest approach

[little moon]

Oh yea I got them mixed, mb

[lavish lark]

oh no

[lavish lark]

nah its fine lol

[little moon]

(Meteoblue)

[lavish lark]

oh this is a bit more optomistic

[little moon]

Yeah that other app shows rain everyday for me lol

[lavish lark]

oh lol

i can mostly only wait until until its 2 days before because then zoom.earth has a (so far quite accurate) prediction of what the weather will be

[little moon]

Yea

Jopefully I get at least some nights

Or some large cloud gap or whatever

[lavish lark]

yea

[steel widget]

im gonna lose my shit if this october weather pulls a "3 week long cloudy" joke and i miss yet another comet opportunity 😭

[wild sequoia]

no

[compact bronze]

Oh Ic

[lavish lark]

another one of my world famous "moshing together that tail simulation and stellarium"