Abell 2151 - Hercules Galaxy Cluster (Tom Wildoner)

Celestial hemisphere: Northern · Constellation: Hercules (Her) · Contains: HD144149 · IC 1170 · IC 1172 · IC 1173 · IC 1176 · IC 1178 · IC 1179 · IC 1181 · IC 1182 · IC 1183 · IC 1184 · IC 1185 · IC 1188 · IC 1192 · IC 1193 · IC 1194 · NGC 6039 · NGC 6040 · NGC 6041 · NGC 6042 · NGC 6043 · NGC 6044 · NGC 6045 · NGC 6047 · NGC 6050 · NGC 6054 · NGC 6056

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Abell 2151 - Hercules Galaxy Cluster

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Abell 2151 - Hercules Galaxy Cluster

Abell 2151 is a large cluster of galaxies (also known as the Hercules Galaxy Cluster) and is located about 500 million light years away and covers an area of 6 million light years with about 200 galaxies. It is part of the Hercules Supercluster, which is part of an even larger extragalactic structure simply known as the Great Wall.

Four groupings of galaxies are included in the Arp Atlas, the most for any galaxy cluster. These include Arp 71 (NGC 6045), Arp 122 (NGC 6040), Arp 172 (IC 1178/81) and Arp 272 (NGC 6050/IC 1179).

Observation data (Epoch J2000)
Constellation(s): Hercules
Right ascension: 16h 05m 15.0s
Declination: +17° 44′ 55″
Brightest member: NGC 6041

Tech Specs: Sky-Watcher Esprit 120ED Telescope, ZWO ASI2600MC camera running at 0F, 108x60 seconds guided exposures, Sky-Watcher EQ6R-Pro pier mounted, ZWO EAF and ASIAir Pro, processed in DSS and PixInsight. Image Date: May 18, 2023. Location: The Dark Side Observatory (W59), Weatherly, PA, USA (Bortle Class 4).

Arp's Peculiar Galaxies

Please note: The following tables are updated every 24 hours.

Distribution of astrophotographers

This table shows the number of distinct astrophotographers who have been assigned and IOTD/TP award compared to the total number of images awarded.
	Distinct awarded users	Total awarded images
Image of the day
Top picks
Top pick nominations

Distribution of subject types

This table shows the distribution of awards per subject type, compared to the popularity of images of that subject type.
	Image of the day	Top pick	Top pick nominations	Total submitted
Deep sky
Solar system
Extremely wide field
Star trails
Northern lights
Noctilucent clouds
Landscape

Distribution of data sources

This table shows the distribution of awards per data source, compared to the popularity of images acquired from that data source.
	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
Traveller
Own remote observatory
Amateur hosting facility
Public amaeteur data
Professional, scientific grade data
Mix of multiple sources
Other
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	8224149
PixInsight job	CTG35J23SFTLDOU9RDK4U5QMYEEK3PB4
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	16h04m52s.138
RA (top/left)	16h03m00s.606
RA (top/right)	16h07m01s.122
RA (bottom/right)	16h06m44s.289
RA (bottom/left)	16h02m41s.966

Dec (center)	+17°45′45″.51
Dec (top/left)	+17°20′49″.66
Dec (top/right)	+17°26′12″.74
Dec (bottom/right)	+18°10′36″.82
Dec (bottom/left)	+18°05′12″.91

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Abell 2151 - Hercules Galaxy Cluster

Abell 2151 - Hercules Galaxy Cluster

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Abell 2151 - Hercules Galaxy Cluster

Abell 2151 - Hercules Galaxy Cluster

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