Hemisphere:  Northern  ·  Constellation: Coma Berenices (Com)  ·  Contains:  NGC 4559  ·  NGC 4565  ·  Needle Galaxy  ·  The star 12Com  ·  The star 13Com  ·  The star 14Com  ·  The star 16Com  ·  The star 17Com  ·  The star 18Com  ·  The star 21Com  ·  The star 23Com  ·  The star 7Com  ·  The star γCom
Coma Star Cluster (Melotte 111 / Collinder 256), 



    
        

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Coma Star Cluster (Melotte 111 / Collinder 256)
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Coma Star Cluster (Melotte 111 / Collinder 256)

Coma Star Cluster (Melotte 111 / Collinder 256), 



    
        

            B0bby White
Coma Star Cluster (Melotte 111 / Collinder 256)
Powered byPixInsight

Coma Star Cluster (Melotte 111 / Collinder 256)

Equipment

Imaging Telescopes Or Lenses
Samyang 135mm f/2.0
Imaging Cameras
Canon 2000Da
Mounts
SW AZ GTi
Accessories
ZWO EAF
Software
PHD 2 · N.I.N.A. · PixInsight 1.8.8 Ripley
Guiding Cameras
T7m

Acquisition details

Dates:
Jan. 30, 2022
Frames:
33x300" (2h 45')
Integration:
2h 45'
Avg. Moon age:
27.57 days
Avg. Moon phase:
4.27%

Basic astrometry details

Astrometry.net job: 5678918

RA center: 12h25m21s.8

DEC center: +26°0328

Pixel scale: 11.834 arcsec/pixel

Orientation: 1.114 degrees

Field radius: 5.464 degrees

Resolution: 1938x2701

Data source: Traveller

Description

The Coma Star Cluster. It's one of the closest open clusters to our home solar system. Only two times far then Hyades. In that reason it's apparent size more than 5 degrees and perfectly observed with naked eyes at spring time.
Hope you like it!

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Image captured on 40km driven from my home city (Kemerovo, Western Siberia, Russia);
Bortle scale is around: 3/4.
Acquisition: 30.01.2022

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Shooting parameters:
Total exp.time: 2:45 h
Sub.: 33x300’’ @f/2,8  ISO200.
Guided (T7m).
Dithering (every 4 frames).
Dark: 31
Bias: 128
Flat: 51 

Imaging soft: N.I.N.A.; PHD2.
Processing: Pixinsight

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