Hemisphere:  Northern  ·  Constellation: Coma Berenices (Com)  ·  Contains:  IC 3946  ·  IC 3949  ·  IC 4040  ·  IC 4051  ·  NGC 4848  ·  NGC 4850  ·  NGC 4860  ·  NGC 4865  ·  NGC 4867  ·  NGC 4869  ·  NGC 4872  ·  NGC 4874  ·  NGC 4881  ·  NGC 4889  ·  NGC 4895  ·  NGC 4907  ·  NGC 4908  ·  NGC 4911  ·  NGC 4919  ·  NGC 4921  ·  NGC 4923
The Coma Galaxy Cluster  Abell 1656, 



    
        

            Lawrence E. Hazel
The Coma Galaxy Cluster  Abell 1656
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The Coma Galaxy Cluster Abell 1656

The Coma Galaxy Cluster  Abell 1656, 



    
        

            Lawrence E. Hazel
The Coma Galaxy Cluster  Abell 1656
Powered byPixInsight

The Coma Galaxy Cluster Abell 1656

Technical card

Imaging telescopes or lenses: Orion USA 8" Newtonian Astrograph

Imaging cameras: SBIG ST-8300C

Mounts: Orion USA Atlas EQ-G

Guiding telescopes or lenses: Orion USA 80mm short tube

Guiding cameras: Orion Starshoot autoguider

Software: DeepSkyStacker  ·  SBIG CCDOps  ·  PHD Guiding  ·  Noel Carboni's Astro Tools for PhotoShop  ·  Noiseware Community Edition  ·  Photoshop 7.0

Filters: Lumicon Deep Sky

Accessory: Astro-Tech Coma Corrector


Dates:March 25, 2017March 27, 2017

Frames:
Lumicon Deep Sky: 8x300" (40') -12C
Lumicon Deep Sky: 4x900" (1h) -12C
Lumicon Deep Sky: 8x900" (2h) -13C

Integration: 3h 40'

Darks: ~2

Flats: ~6

Avg. Moon age: 27.79 days

Avg. Moon phase: 4.55%

Mean FWHM: 3.80


Basic astrometry details

Astrometry.net job: 1510982

RA center: 12h 59' 49"

DEC center: +27° 57' 43"

Pixel scale: 1.197 arcsec/pixel

Orientation: -167.986 degrees

Field radius: 0.578 degrees


Resolution: 1824x1356

Locations: my backyard, Lake Placid, Florida, United States

Description

The Coma Cluster (Abell 1656) is a large cluster of galaxies that contains over 1,000 identified galaxies. Along with the Leo Cluster (Abell 1367), it is one of the two major clusters comprising the Coma Supercluster. It is located in and takes its name from the constellation Coma Berenices.

The cluster's mean distance from Earth is 99 Mpc (321 million light years). Its ten brightest spiral galaxies have apparent magnitudes of 12–14 that are observable with amateur telescopes larger than 20 cm. The central region is dominated by two supergiant elliptical galaxies: NGC 4874 and NGC 4889.[12] The cluster is within a few degrees of the north galactic pole on the sky. Most of the galaxies that inhabit the central portion of the Coma Cluster are ellipticals. Both dwarf and giant ellipticals are found in abundance in the Coma Cluster.

from Wilkpedia

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