IC 421 (Gary Imm)

Celestial hemisphere: Southern · Constellation: Orion (Ori) · Contains: IC 421

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IC 421

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IC 421

This Astrobin Debut Object is a faint face-on barred spiral galaxy located 165 million light years away in the constellation of Orion at a declination of -8 degrees. This magnitude 15 galaxy spans 3 arc-minutes in our apparent view, which corresponds to a large diameter of 150,000 light years.

Some DSOs reveal themselves easily, like a teenager on Facebook. This one is more like my Facebook profile – it just doesn’t want to show itself to us. I did what I could through processing to bring out some detail.

It is clear that this galaxy has been disturbed by something. The most likely candidate is the small galaxy seen slightly below and to the right, galaxy 6dFGS gJ053200.8-075552. If it is the same distance away as IC 421, it is a small dwarf galaxy at only 15,000 light years in diameter. But if it has passed through the larger galaxy, even that small size could create quite a bit of havoc in the arm structure.

Unique or Unusal Deep Sky Targets
ZWO ASI294MM Pro Images
CMOS Imagers
Cloudy Nights
First on Astrobin
Schmidt-Cassegrain Telescope (SCT) Imagers
Rarely Imaged Small DSOs
Texas Astronomy
Images from the EdgeHD Series

Astrobin Debuts (670 DSOs)
Barred Galaxies
Face-on 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	4314158
PixInsight job	NGD0M7PXW5M45G0VRRPZD85M7S3B2SHJ
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	05h32m08s.672
RA (top/left)	05h32m36s.535
RA (top/right)	05h31m42s.537
RA (bottom/right)	05h31m40s.786
RA (bottom/left)	05h32m34s.798

Dec (center)	-07°55′09″.83
Dec (top/left)	-07°49′58″.52
Dec (top/right)	-07°49′26″.84
Dec (bottom/right)	-08°00′20″.72
Dec (bottom/left)	-08°00′52″.68

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Contribution Index (beta):

IC 421

IC 421

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Image Index:

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IC 421

IC 421

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