Arp 170 - Abell 2572 - Hickson 94 (Gary Imm)

Celestial hemisphere: Northern · Constellation: Pegasus (Peg) · Contains: NGC 7578 · NGC 7588 · NGC 7597 · NGC 7598 · NGC 7602

Arp 170 - Abell 2572 - Hickson 94

This image captures a rarely imaged series of objects located in the constellation of Pegasus at a declination of +19 degrees.

Arp 170 is comprised of the two brightest elliptical galaxies on the right side of the image. These galaxies are located about a half billion light years away. Each galaxy spans 1 arc-minute in our apparent view, which corresponds to a diameter of 150,000 light years. This Arp object is classified in the category of "Galaxies with Diffuse Counter-tails". Both of these galaxies are also designated as NGC 7578.

Arp 170 is part of Hickson 94, consisting of 7 galaxies in total. Hickson 94 has the highest galactic density of any of the Hickson Galaxy Groups.

The left side of the image also contains many galaxies, including 4 NGC galaxies. These galaxies are the same distance away (500 million light years) as the ones on the right, and indeed the entire image is designated as the Abell 2572 galaxy cluster. Numerous bright foreground Milky Way stars obscure the galaxies somewhat.

As far as I can recall, I think this part of the sky might be the only opportunity to capture all three major galaxy designated objects (Arp, Hickson and Abell) in the same narrow field of view.

Final
Original
B

B

Description: Comparison to Original Arp Image

Uploaded: ...

The refractors!
Cloudy Nights
Arp's Peculiar Galaxies
Abell Galaxy Clusters
Hickson Galaxy Clusters
Takahashi Refractors
ZWO ASI183/QHY183

Abell Galaxy Cluster Catalog (27)
Arp Catalog (Complete)
Galaxy Clusters
Galaxy Groups
Hickson Catalog (Complete)
M2S (Short Bridge) Galaxy Merger

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	3048302
PixInsight job	UNA89X5AAHYR2ULB1VHYJL1EDL0U7R9L
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	23h17m56s.590
RA (top/left)	23h18m59s.999
RA (top/right)	23h16m55s.747
RA (bottom/right)	23h16m53s.311
RA (bottom/left)	23h18m57s.312

Dec (center)	+18°40′34″.11
Dec (top/left)	+18°49′34″.82
Dec (top/right)	+18°50′31″.90
Dec (bottom/right)	+18°31′32″.40
Dec (bottom/left)	+18°30′35″.97

Image Index:

Contribution Index (beta):

Arp 170 - Abell 2572 - Hickson 94

Arp 170 - Abell 2572 - Hickson 94

Equipment

Acquisition details

Description

Comments

Revisions

B

Sky plot

Histogram

In these public groups

In these collections

		...
You have no new notifications.

Image Index:

Contribution Index (beta):

Arp 170 - Abell 2572 - Hickson 94

Arp 170 - Abell 2572 - Hickson 94

Equipment

Acquisition details

Description

Comments

Revisions

B

Sky plot

Histogram

In these public groups

In these collections

Notifications

AstroBin is in READ ONLY mode

Sorry :-(

Sorry :-(

Sorry :-(

Are you really sure?

Warning!

Warning!

Are you sure?

Report abuse

Slideshow settings

IOTD/TP stats (last [x] days)

Distribution of astrophotographers

Distribution of subject types

Distribution of data sources

Sorry

Sorry

Share

Upload new revision

Upload uncompressed source (XISF/FITS/PSD/TIFF)

Delete image and all its revisions?

Delete original image?

Delete all other versions?

Delete all revisions?

Delete this revision?

IOTD/TP stats

The following people like this image

The following people bookmarked this image

Warning

Flag malfunctioning thumbnails

Contains

Remove yourself as a collaborator

Plate-solving information