Antennae Galaxies with Arp 22 (Dionysus)

Celestial hemisphere: Southern · Constellation: Corvus (Crv) · Contains: Antennae · Antennae Galaxies · HD104151 · HD104357 · HD104440 · HD104456 · HD104457 · HD104496 · HD104628 · NGC 4027 · NGC 4038 · NGC 4039

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Antennae Galaxies with Arp 22

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Antennae Galaxies with Arp 22

About 1.2 billion years ago, the Antennae were two separate galaxies, with NGC 4038 being a barred spiral and NGC 4039 a spiral galaxy. Around 900 million years ago the Antennae began to approach one another and 600 million years ago the Antennae passed through each other, looking somewhat like the Mice Galaxies. 300 million years ago, the Antennae's stars began to be released from both galaxies. Today the two streamers of ejected stars extend far beyond the original galaxies, resulting in the antennae shape.

Within 400 million years, the Antennae's nuclei will collide and become a single core with stars, gas, and dust around it. Observations and simulations of colliding galaxies suggest that the Antennae Galaxies will eventually form an elliptical galaxy.

NGC 4027 / Arp 22 (top right of image) was likely involved in its own galactic collision in the distant past, giving it a rather charming shape and structure.

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	8095821
PixInsight job	0IM316I10GI7431MFE4WAGSAFI2JIYY4
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	12h00m59s.268
RA (top/left)	11h58m59s.137
RA (top/right)	11h58m45s.442
RA (bottom/right)	12h03m00s.180
RA (bottom/left)	12h03m12s.377

Dec (center)	-19°00′37″.74
Dec (top/left)	-18°29′03″.57
Dec (top/right)	-19°29′02″.39
Dec (bottom/right)	-19°32′06″.84
Dec (bottom/left)	-18°32′06″.97

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Contribution Index (beta):

Antennae Galaxies with Arp 22

Antennae Galaxies with Arp 22

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Image Index:

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Antennae Galaxies with Arp 22

Antennae Galaxies with Arp 22

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