Coma Berenices

 Posted: Apr 9th, 2026
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NGC
IC
HD
Technical Info
Telescope/Lens: Askar SQA55
Camera: ZWO ASI2600MC Duo
Mount: EQ6-R
Exposure:
185 x 120" ISO/Gain: 100
Gray, Bortle 2 zone:
 Barnaul, Russia
6 h 10 m
196
Resolution: 6000x4000 px
Scale: 99125 KB

For an experiment, I shot with a crosshair made of threads. That's why the stars have rays.

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Comments

6 hours is very little, especially since these are stars, not some galaxies or nebulae. Try to get at least 12 hours.
6 Jul, 2026 Reply
Dmcl Replied to Neb
I didn’t understand the part about “especially since these are stars, not some galaxies or nebulae.” These are stars. When talking about SNR on stars versus nebulae, the SNR is certainly higher on stars because they are bright objects. That means you need less integration time to achieve the same SNR, not more. The image was taken as a test of the Askar SQA55 with a crosshair.
6 Jul, 2026 Reply
Neb Replied to Dmcl
The entire message is sarcasm. When I saw the inscription "6h 10m," I was in shock, because I haven't accumulated that much light in my entire life. Plus, if I had spent that much time on just stars, it would have been the 6 most uselessly spent hours of my life.
6 Jul, 2026 Reply
Dmcl Replied to Neb
Understood.
6 Jul, 2026 Reply

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