Hickson 23 Galaxy Group (Gary Imm)

Celestial hemisphere: Southern · Constellation: Eridanus (Eri) · Contains: IC 1880 · NGC 1208 · NGC 1214 · NGC 1215 · NGC 1216 · PGC 11673 · PGC 11675 · PGC 11690 · PGC 175850 · PGC 175867 · PGC 986839 · PGC 987027 · PGC 987787 · PGC 987996 · PGC 989036 · PGC 989243 · PGC 989820 · PGC 989883

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Hickson 23 Galaxy Group

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Hickson 23 Galaxy Group

This object is a shows an assortment of galaxies located in the southern constellation of Eridanus at a declination of -10 degrees.

The group of 5 galaxies at upper left is Hickson 23. The biggest at brightest of these, at magnitude 15, is the ringed grand spiral NGC 1215. Like the 4 other larger galaxies at upper left, it is about 220 million light years away. NGC 1215 is the largest of these, at a diameter of 120,000 light years. Of these 4, one is exactly edge-on, and the other 3 all show evidence of a mid-disk ring.

The small “companion” just above NGC 1215 is the only one of these 5 galaxies which is not at the same distance – it is twice as far away at about a half billion light years away. It is not uncommon for the galaxies of Hickson groups to be at different distances – many are simply line of sight alignments.

The other galaxies in this image are not part of the Hickson group. The beautiful yellow ringed spiral at upper right is NGC 1208. This galaxy is a bit closer at 190 million light years.

At the bottom right is the huge elliptical IC 1880. Although it looks the same size as the other galaxies in the image, it is twice as far away at 440 million light years. It has a whopping diameter of 300,000 light years.

Unique or Unusal Deep Sky Targets
Cloudy Nights
First on Astrobin
Schmidt-Cassegrain Telescope (SCT) Imagers
Rarely Imaged Small DSOs
Texas Astronomy
Hickson Galaxy Clusters
ZWO ASI1600MM/QHY163M
Images from the EdgeHD Series

Astrobin Debuts (670 DSOs)
Galaxy Groups
Hickson Catalog (Complete)

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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	4098207
PixInsight job	H62MUUI03K27QHX93E7HDVJ7TXA7TATG
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	03h06m40s.912
RA (top/left)	03h07m19s.195
RA (top/right)	03h05m57s.210
RA (bottom/right)	03h06m02s.583
RA (bottom/left)	03h07m24s.834

Dec (center)	-09°37′36″.87
Dec (top/left)	-09°28′50″.85
Dec (top/right)	-09°30′37″.49
Dec (bottom/right)	-09°46′22″.75
Dec (bottom/left)	-09°44′35″.85

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Hickson 23 Galaxy Group

Hickson 23 Galaxy Group

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Hickson 23 Galaxy Group

Hickson 23 Galaxy Group

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