Arp 224 (Gary Imm)

Celestial hemisphere: Northern · Constellation: Ursa Major (UMa) · Contains: NGC 3916 · NGC 3921 · PGC 2486701 · PGC 2487197 · PGC 2488118 · PGC 2488967 · PGC 2489542 · PGC 2489548 · PGC 2489609 · PGC 2490363 · PGC 2490574 · PGC 2491113 · PGC 2491428 · PGC 2491459 · PGC 2491736 · PGC 2492862 · PGC 37013

Arp 224

This small object is located 280 million light years away in the constellation of Ursa Major at a declination of +55 degrees. It spans 2 arc-minutes in our apparent view, which corresponds to an actual span of 190,000 light years.

It is not clear exactly what is happening here. Little has been written on this 12.6 magnitude object to help in this understanding. Arp classified it in the category of "Galaxies with amorphous spiral arms". There appears to be a single bright core and several arcing star streams, so my guess is that this is a merger in progress that started with two galaxies (a spiral and an elliptical).

The background is almost as fascinating as the main object. Most of the background objects are galaxies, not stars. This includes four larger interesting edge-on spirals. The orange elliptical above and slightly left of center is PGC 2491113, the brightest galaxy in a cluster of galaxies known as Zwicky Cluster 1148.6+5523, one billion light years away.

Final
Original
C

C

Description: Comparison to Original Arp Image

Uploaded: ...

Schmidt-Cassegrain Telescope (SCT) Imagers
ZWO ASI1600MM/QHY163M
Texas Astronomy
Images from the EdgeHD Series
Unique or Unusal Deep Sky Targets
Cloudy Nights
Arp's Peculiar Galaxies

Arp Catalog (Complete)
Galaxy Loops
Small Packages Catalog (Complete)

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	3434306
PixInsight job	LJ3W8MTVXT2KVKFTT39JVJLXLTY8IQ2I
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	11h51m06s.896
RA (top/left)	11h52m04s.953
RA (top/right)	11h50m06s.472
RA (bottom/right)	11h50m09s.165
RA (bottom/left)	11h52m07s.700

Dec (center)	+55°04′49″.39
Dec (top/left)	+55°11′18″.44
Dec (top/right)	+55°10′50″.95
Dec (bottom/right)	+54°58′18″.64
Dec (bottom/left)	+54°58′46″.30

Image Index:

Contribution Index (beta):

Arp 224

Arp 224

Equipment

Acquisition details

Description

Comments

Revisions

C

Sky plot

Histogram

In these public groups

In these collections

		...
You have no new notifications.

Image Index:

Contribution Index (beta):

Arp 224

Arp 224

Equipment

Acquisition details

Description

Comments

Revisions

C

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