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Contains:  NGC 4923, NGC 4921, NGC 4919, IC 4051, NGC 4911, NGC 4908, NGC 4907, IC 4040, NGC 4896, NGC 4895, NGC 4889, NGC 4881, NGC 4874, NGC 4872, NGC 4869, NGC 4867, NGC 4865, NGC 4860, IC 3949, IC 3946, NGC 4850, NGC 4848
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Abell 1656 the Coma cluster, 


            Toshiya Arai
Abell 1656 the Coma cluster

Abell 1656 the Coma cluster

Technical card

Imaging telescope or lens:Takahashi CCA250

Imaging camera:QHYCCD QHY367C

Mount:Skywatcher EQ8

Guiding telescope or lens:Takahashi GT-40

Guiding camera:Starlight Xpress Lodestar2

Focal reducer:Takahashi Extender CR1.5X

Software:PixInsight 1.8Adobe Photoship CC 2017FlatAidePro

Resolution: 4096x2716

Dates:March 31, 2019

Frames: 24x600"

Integration: 4.0 hours

Avg. Moon age: 25.12 days

Avg. Moon phase: 20.45% job: 2619965

RA center: 194.942 degrees

DEC center: 27.991 degrees

Pixel scale: 0.949 arcsec/pixel

Orientation: 0.321 degrees

Field radius: 0.648 degrees

Locations: Arakine, Isumi-city, Chiba, Japan

Data source: Traveller


Gain 2801, Offset 76



Toshiya Arai
License: None (All rights reserved)

Sky plot

Sky plot


Abell 1656 the Coma cluster, 


            Toshiya Arai