Arp 81 (Gary Imm)

Celestial hemisphere: Northern · Constellation: Draco (Dra) · Contains: NGC 6621 · NGC 6622

Arp 81

This object is a tiny interacting pair of merging spiral galaxies, NGC 6621 and NGC 6622, located 300 million light years away in the constellation of Draco. NGC 6621 is the larger galaxy towards the top and NGC 6622 is at the bottom (the Astrobin annotation is incorrect). The galaxy pair is classified as a starburst system. The main portions of each of these galaxies are less than 30 arc-seconds in apparent width to us.

My favorite part of the image is the long curving star stream that connects both galaxies. This stream is twice the span of our Milky Way. Other signs of the merger include the distorted bright yellow galaxy cores, and the vigorous star formation as shown in the bright blue arc-like cluster midway between the two cores.

A number of other faint galaxies are visible in the background.

Final
Original
B

B

Description: Comparison to Original Arp Image

Uploaded: ...

The refractors!
Cloudy Nights
ZWO ASI1600MM/QHY163M
Arp's Peculiar Galaxies

Antennae-type Galaxies
Arp Catalog (Complete)
M3 (2 Close Cores) Galaxy Merger
Single Tails of Galaxies
Small Packages Catalog (Complete)
Starburst 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	2594615
PixInsight job	48BBKE0X45IBPXN9N6JJG7JC8KH1P5NI
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	18h12m57s.666
RA (top/left)	18h12m20s.697
RA (top/right)	18h11m05s.816
RA (bottom/right)	18h13m34s.400
RA (bottom/left)	18h14m50s.809

Dec (center)	+68°21′41″.57
Dec (top/left)	+68°34′06″.31
Dec (top/right)	+68°14′02″.63
Dec (bottom/right)	+68°09′16″.90
Dec (bottom/left)	+68°29′16″.14

Image Index:

Contribution Index (beta):

Arp 81

Arp 81

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 81

Arp 81

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