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Abell 1656 - Coma Cluster NGC 4874, NGC 4889 and some more, 



    
        

            Riedl Rudolf
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Abell 1656 - Coma Cluster NGC 4874, NGC 4889 and some more

Technical card

Imaging telescopes or lenses: Celestron C11 XLT

Imaging cameras: Nikon D750 (unmodified)

Mounts: Sky-Watcher EQ-8 pro

Focal reducers: Starizona FF Reducer 0,71x

Software: Pixinsight 1.8

Filters: Idas UV/IR cut

Accessory: MGEN II Autoguider with 9x50mm finderscope


Dates:Feb. 15, 2021

Frames: 68x302" ISO1600

Integration: 5.7 hours

Darks: ~25

Flats: ~25

Bias: ~25

Avg. Moon age: 3.55 days

Avg. Moon phase: 13.62%

Bortle Dark-Sky Scale: 4.00

Mean SQM: 21.30

Temperature: -7.00


Astrometry.net job: 4236172

RA center: 12h 59' 53"

DEC center: +28° 1' 17"

Pixel scale: 0.828 arcsec/pixel

Orientation: -5.367 degrees

Field radius: 0.487 degrees


Resolution: 3404x2499

Data source: Backyard

Description

Abell 1656 the Coma Cluster. I took a picture last year with the Astrograph and now with the C11 for a closer look.
The two main galaxies are NGC 4874 in 320 Mio Lj distance. The Galaxy is 10 times bigger than the Milky Way! Size 1,9 x 1,9 arcmin.
The other is NGC 4889 in 290 Mio Lj distance. Last year the biggest Black Hole was found in these galaxies. There are plenty of other Galaxies from the Coma Cluster as well as a lot of faint galaxies in the background in much larger distances.

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Abell 1656 - Coma Cluster NGC 4874, NGC 4889 and some more, 



    
        

            Riedl Rudolf