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 Post subject: NGC 7009, with ASI224MC
 Post Posted: Wed Oct 18, 2017 4:21 am 
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Joined: Sat Sep 12, 2015 8:40 pm
Posts: 23
NGC 7009 is a small planetary nebula found in Aquarius, it was discovered by Herschel in 1782 but it was Lord Rosse in 1840 who gave it the name of the Saturn nebula, with his 91 cm he saw the handles on each side of the nebula that reminds one of Saturn.
Its distance is poorly known like many planetary nebula, the last figures speak of 5000 LY.
It has a large surface magnitude (Mg 8), so it is perfect for high-speed high-speed poses (exposure: 500ms ,gain: 450 for 3200mm focal length).

Material:
TN 300mm F4, barlow 2,7 et ASI224MC

Expo: 5h (36000x500ms)

Image

the full:
https://c1.staticflickr.com/5/4475/37559470386_33ae8c950d_o.jpg

Stephane

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 Post Posted: Sat Oct 28, 2017 2:47 am 
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Great. How did you manage to do it?

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 Post Posted: Sun Oct 29, 2017 12:19 pm 
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Joined: Sat Sep 12, 2015 8:40 pm
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hi Wikki and thank you ,
I used FC and I took catches in SER of 10 minutes. Then I link everything with PIPP. Each session obtained is stacked with IRIS. I am using deconvolution lucy richardson to improve the definition. At the end I mix the layers (stars and targets) together with photoshop, a little decoration and go!

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