Probeller Nebula, Simeis57

[gentle yoke]

Seestar Big30350x20sec, of which 103subs actually have satellite trails (!!!)
leaving 247x20sec

Bortle 4-5
Pixinsight, Photoshop

The Propeller Nebula (Simeis 57) is part of an extensive and rich HII region in the constellation Cygnus, known as the Cygnus X complex. It was first catalogued in the early 1950s by astronomers at the Astrophysical Observatory in Crimea in Simeis, Ukraine, as the 57th object in a catalogue of 306 HII regions. The Propeller Nebula is often mistakenly referred to as DWB 111, but DWB 111 only identifies the southern (lower) arm, while the northern arm is DWB 119. The DWB catalog was developed in 1969 by H. R. Dickel, H. Wendker, and J. H. Bieritz, who cataloged 193 different objects as part of their study of Hα emission nebulae in the Cygnus X region of the sky.
The Propeller Nebula is probably about 5,000 light-years away from Earth. (wiki)

[high bolt]

Hey you don’t need to remove the subs with sattelite trails! Stacking will remove it with pixel rejection (:

[gentle yoke]

Yes, that's what stacking did 😁 it removed 103 subs with satellite trails

[high bolt]

Oh it should not have removed them for sattelite trails, it should stack them but remove the sattelite trails from those frames

Unless stars was traily or those subs had clouds etc in, it shouldnt remove then for sattelite trails only

[obsidian sparrow]

Just to be clear, there's a difference between sub rejection and pixel rejection. If you have sub rejection on you might want to turn that off or at least make it less aggressive.

I'd love to throw some more focal length at this object myself...

[gentle yoke]

than there must be a reason for rejection i dont know

never had that much rejection before

[gentle yoke]

i took another look and i think there where a lot of subs with startrailing

[obsidian sparrow]

Ah, that'll do it...still you managed to get plenty of good data

[gentle yoke]

Tx 😉