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
NGC 896, The Fish Head Nebula
Forum rules
Please upload large images to photo sharing sites (flickr, etc) rather than trying to upload them as forum attachments.
Please share the equipment used and if possible camera settings to help others.
Please upload large images to photo sharing sites (flickr, etc) rather than trying to upload them as forum attachments.
Please share the equipment used and if possible camera settings to help others.
NGC 896, The Fish Head Nebula
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- NGC_896_Lum_80x50s_G100_BL20_TEMPMATCH.jpg (265.25 KiB) Viewed 2786 times
Re: NGC 896, The Fish Head Nebula
That looks very well acquired and processed, good job
Re: NGC 896, The Fish Head Nebula
Well done Brian.
Can you post a FITS Liberator snip of both the histogram and image statistics for a single light?
Dave
Can you post a FITS Liberator snip of both the histogram and image statistics for a single light?
Dave
Re: NGC 896, The Fish Head Nebula
My pleasure...
- Attachments
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- Ze Fish Head FITS Liberator.jpg (195.42 KiB) Viewed 2772 times
Re: NGC 896, The Fish Head Nebula
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
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
Re: NGC 896, The Fish Head Nebula
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
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