NGC 896, The Fish Head Nebula

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oopfan
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NGC 896, The Fish Head Nebula

Post by oopfan » Fri Sep 07, 2018 5:12 pm

I am not sure if Fish Head Nebula is official but people do refer to it as such. It is part of the Heart Nebula but it has a different NGC designation.

This image uses my Temperature Matching Method for achieving better stacks with an uncooled camera. You can read more about it
here.

Technical Details:

William Optics 71mm f/5.9
Altair 290M camera (uncooled)
Optolong luminance filter
Unitron Model 142 GEM
Passive tracking with PEC
No active guiding

Gain 100 (FWD: 15ke-, 3.66 e-/ADU)
Offset: 20 ADU
Exposure: 50s
Camera rotation: 3.8 deg E of N

Luminance:
69.0 degF: 8 frames
69.5 degF: 54 frames
70.0 degF: 26 frames
70.5 degF: 12 frames
Darks:
69.0 degF: 269 frames
69.5 degF: 141 frames
70.0 degF: 86 frames
70.5 degF: 113 frames
Flats: 100
Bias: 100
Total integration time: 66 minutes (it really needs more time)

SharpCap 3.1.5219
PIPP 2.5.9
Deep Sky Stacker 3.3.2
StarTools 1.3.5.289

Brian
Attachments
NGC_896_Lum_80x50s_G100_BL20_TEMPMATCH.jpg
NGC_896_Lum_80x50s_G100_BL20_TEMPMATCH.jpg (265.25 KiB) Viewed 942 times

mAnKiNd
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Re: NGC 896, The Fish Head Nebula

Post by mAnKiNd » Fri Sep 07, 2018 6:07 pm

That looks very well acquired and processed, good job :)

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turfpit
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Re: NGC 896, The Fish Head Nebula

Post by turfpit » Fri Sep 07, 2018 6:36 pm

Well done Brian.

Can you post a FITS Liberator snip of both the histogram and image statistics for a single light?

Dave

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oopfan
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Re: NGC 896, The Fish Head Nebula

Post by oopfan » Fri Sep 07, 2018 6:54 pm

My pleasure...
Attachments
Ze Fish Head FITS Liberator.jpg
Ze Fish Head FITS Liberator.jpg (195.42 KiB) Viewed 928 times

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turfpit
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Re: NGC 896, The Fish Head Nebula

Post by turfpit » Fri Sep 07, 2018 7:09 pm

Thanks Brian.

Looks like exposure=50s, gain=100 (minimum) & black level=20 are good settings for that type of object using an Altair camera.

I have been using 60x60s but will have a look at 100x50s. 60 minutes v 83 minutes.

Dave

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oopfan
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Re: NGC 896, The Fish Head Nebula

Post by oopfan » Fri Sep 07, 2018 7:37 pm

Dave,

50s was a decision I had to make before building the Darks library. I've acquired with 60s and 70s in the past when there were less bright stars that I couldn't crop out. I decided on 50s. That sets a limit of about 9th magnitude for when they start saturating.

Brian

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Re: NGC 896, The Fish Head Nebula

Post by mAnKiNd » Sun Sep 09, 2018 1:37 am

Textbook histogram!

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