Crescent Nebula with its nearest surroundings - HOO

[Vroobel]

Crescent Nebula (NGC 6888) - 2024.05.19-07.23 - HOO

Altair WAVE 102EDT APO Triplet, 0.8x reducer (F/5.6), Optolong 2" SHO (+ RGB stars), ASI 2600MM-Pro @ Celestron CGX;
13h of HOO integration time: 75 x 180s Ha, 73 x 180s OIII Bin1, 113 x 180s OIII Bin2; Gain 101, Offset 50, -10°C;
3 x 60 x 30s of RGB stars
NINA, PixInsight, Affinity Photo;
Liverpool, Bortle 9(+).

https://www.astrobin.com/pnmmb9/B/

 

 

 

[TiffsAndAstro]

Very nice so much depth and detail.

[Vroobel]

Thank you. It's another image containing a 3D-like gas structure. I like it. ☺️

 

[TiffsAndAstro]

1 hour ago, Vroobel said:

Thank you. It's another image containing a 3D-like gas structure. I like it. ☺️

 

I'm genuinely surprised how much of it some images manage to reveal  and it can sometimes compete with the "main object" as the best part of an image.

[gorann]

Great result, not the least for being from a Bortle 9 sky! Not far from last years IKO data from a very dark site in Spain:

Cheers, Göran

 

[Vroobel]

Thank you, Goran 😊

I'm going to grab some SII photons too, but have to make a break and image any galaxy for the change. The Fireworks matches my sky and horizon now. 🙂

 

[a6400]

Amazing image, like from Hubble. 😇

[Vroobel]

Thanks. 😁

[Ags]

Excellent! What narrowband filters are you using?

[Vroobel]

Thank you ☺️

They are Optolong SHO 6.5/7nm (and LRGB for stars). 

 

Edited July 26 by Vroobel

[Ags]

I was guessing 3 nm filters as you have such good SNR.

[Vroobel]

Usually, I was taking 5 mins subs, but this time I made an experiment and worked with 3 mins subs. Maybe I'm wrong, but as the 6.5/7nm filters allow to pass the unwanted light more than the narrower ones, I figured out that a higher number of shorter frames should improve the SNR. I would be happy if someone wiser than me shares their opinion. 😊

 

Edited July 26 by Vroobel

[JonHigh]

On 26/07/2024 at 13:40, Vroobel said:

Usually, I was taking 5 mins subs, but this time I made an experiment and worked with 3 mins subs. Maybe I'm wrong, but as the 6.5/7nm filters allow to pass the unwanted light more than the narrower ones, I figured out that a higher number of shorter frames should improve the SNR. I would be happy if someone wiser than me shares their opinion. 😊

 

Hi. Lovely image.
I have the same scope and camera combo except the Altair OsC version. I have also found 3 min subs have worked out well with excellent results in my Bortle 6 skies. 
 

[Vroobel]

Thanks.   I think I'll stay with the 3 minutes at least for a while.

[Martyn87]

Absolutely stunning!

[Vroobel]

Thank you ☺️