C49

 Posted: Feb 21st, 2026
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NGC
IC
HD
Technical Info
Telescope/Lens: SkyRover 50SAW
Camera: QHY miniCAM8M
Mount: ZWO AM3
Guide Scope: SVBony SV165
Guide Camera: ASI120MM
Software: NINA, PixInsight
Accessories: Gemini AF
Exposure:
10 x 60" ISO/Gain: 9 - R
10 x 60" ISO/Gain: 9 - G
10 x 60" ISO/Gain: 9 - B
30 x 180" ISO/Gain: 9 - S
30 x 180" ISO/Gain: 9 - H
30 x 180" ISO/Gain: 9 - O
Gray, Bortle 2 zone:
 Aktau, Kazakhstan
 Feb 20th, 2026
5 h 0 m
180
Resolution: 3824x2139 px
Scale: 5990 KB
The first and likely the last object of the winter.
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Comments

I like it. I have zero [shots] over the winter, even though I live in the south of Russia (Krasnodar).
23 Feb, 2026 Reply
That's Shai-Hulud!
23 Feb, 2026 Reply
Maksim Selivanov Replied to Foxcub
Yeah, looks like it)
23 Feb, 2026 Reply
If you change the color of the oxygen in the center of the Rosette Nebula, will it look okay?
23 Feb, 2026 Reply
Maksim Selivanov Replied to Konfuz
Well, ideologically it would be correct to remove the magenta, but on the other hand, in the center the Ha and OIII are so densely mixed that it really should be magenta.
I have a couple more versions, including the "proper" one with the center adjusted—I don’t want to flood the feed with similar-looking work.
24 Feb, 2026 Reply
Did you use the extended dynamic range mode on the camera? Or did you shoot in the normal mode?
3 Mar, 2026 Reply
Maksim Selivanov Replied to Albireo7
Always on. I posted a comparison of the modes on an astronomy forum somewhere, plus I tested it on M42—an exceptionally useful feature.
3 Mar, 2026 Reply
Is that large dark red tail on the right only visible in sulfur? Or is it also present in hydrogen?
3 Mar, 2026 Reply
Maksim Selivanov Replied to Albireo7
Hydrogen, and not very stretched out) There was still room to add more. This is HOO with a mix of SII.
3 Mar, 2026 Reply
Albireo7 Replied to Maksim Selivanov
Ah, so you have sulfur and hydrogen in the red channel, and oxygen in the green and blue?
3 Mar, 2026 Reply
Maksim Selivanov Replied to Albireo7
https://youtu.be/td4Z4_fIQOE?si=QpUcrM8FyotrAShX This shows it most clearly.
3 Mar, 2026 Reply
Albireo7 Replied to Maksim Selivanov
Unfortunately, I can't watch YouTube.
3 Mar, 2026 Reply
Maksim Selivanov Replied to Albireo7
Briefly - combine HOO, normalize, color HII in gold, stretch the first and second, blend to taste. The principle is described in many places.
3 Mar, 2026 Reply

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