Abell 1656 The Coma Cluster - Newton 250mm f/4 - Bortle 7 backyard (Mathieu Guinot)

Celestial hemisphere: Northern · Constellation: Coma Berenices (Com) · Contains: IC 3943 · IC 3946 · IC 3947 · IC 3949 · IC 3955 · IC 3957 · IC 3959 · IC 3960 · IC 3963 · IC 3968 · IC 3973 · IC 3976 · IC 3998 · IC 4011 · IC 4012 · IC 4021 · IC 4026 · IC 4030 · IC 4033 · IC 4040 · IC 4041 · IC 4042 · IC 4044 · IC 4045 · IC 4051 · IC 4106 · IC 839 · NGC 4828 · NGC 4840 · NGC 4848 · And 35 more.

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Abell 1656 The Coma Cluster - Newton 250mm f/4 - Bortle 7 backyard

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Abell 1656 The Coma Cluster - Newton 250mm f/4 - Bortle 7 backyard

The fantastic Coma Cluster (Abell 1656) located 330 millions light-years away in Coma Berenice contains over 1000 identified galaxies. Along with the Leo Cluster (Abell 1367), it is one of the two major clusters comprising the Coma Supercluster.
The central region is dominated by two supergiant elliptical galaxies : NGC4874 and NGC4889, and as is usual for clusters of this richness, the galaxies are overwhelmingly elliptical, with only a few spirals of younger age near the outskirts of the cluster.

I wanted to capture this object for a long time and I'm glad I could do it from my downtown Bortle 6-7 sky :-)

Backyard

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Distribution of astrophotographers

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	Distinct awarded users	Total awarded images
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	Image of the day	Top pick	Top pick nominations	Total submitted
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	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
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Unknown

The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

Submitted The date and time when you submitted this image for IOTD/TP consideration.	...
Views by Submitters (available since September 19th, 2023) Every image is assigned to 50% of available Submitters. In the event that at least 80% of them don't view the image before its time in the IOTD/TP process expires, it's assigned to the other 50% of Submitters and the process begins anew.
Promotions by Submitters When 3 distinct Submitters promote the image, it moves on to the next stage of the process: evaluation for Top Pick status. This requirement, in addition to anonymization of images and distribution to only a subset of them, prevents biases and ensures that the best images are selected.
Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
Early dismissal Staff members have a lot of images to inspect on a daily basis, and they can dismiss images if they believe they don't meet the requirements for IOTD/TP selection. If an image is dismissed 5 times, it's removed from the process. This streamlines the process and ensures that any bias present in promotions could be overruled by other staff members.

Status	Advanced success
Started	...
Astrometry.net job	5585937
PixInsight job	UIDG6XJ6G35GIM18UEAQOC0CU4HORYQ3
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	12h59m48s.665
RA (top/left)	13h02m56s.641
RA (top/right)	12h56m41s.351
RA (bottom/right)	12h56m41s.979
RA (bottom/left)	13h02m54s.238

Dec (center)	+27°58′51″.40
Dec (top/left)	+28°25′57″.40
Dec (top/right)	+28°26′13″.32
Dec (bottom/right)	+27°31′20″.39
Dec (bottom/left)	+27°31′05″.73

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Abell 1656 The Coma Cluster - Newton 250mm f/4 - Bortle 7 backyard

Abell 1656 The Coma Cluster - Newton 250mm f/4 - Bortle 7 backyard

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Abell 1656 The Coma Cluster - Newton 250mm f/4 - Bortle 7 backyard

Abell 1656 The Coma Cluster - Newton 250mm f/4 - Bortle 7 backyard

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