M 100

Celestial hemisphere: Northern · Constellation: Coma Berenices (Com) · Contains: HD107726 · M 100 · NGC 4312 · NGC 4321 · NGC 4322 · NGC 4323 · NGC 4328

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M 100

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M 100

M100 is a grand design spiral in Coma Berenices. It is about 55 million light years distant and one of the brightest and largest galaxies in the Virgo Cluster. It was discovered by Pierre Mechain in 1781 and was one of the first spiral galaxies to be discovered. Both NGC 4323 (close to M100 on the right side) and NGC 4328 are satellite galaxies of M100 with NGC 4323 connected with it by a bridge of luminous matter.

M100 is considered a starburst galaxy with the strongest star formation activity concentrated at the center within a ring consisting of two tightly wound spiral arms. This core area is very bright within the blue channel. See Revision for a close up of the core area.

Imaged over several nights: Apr 14, 20-21, 2023.

Original
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Description: M100 core

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Schmidt-Cassegrain Telescope (SCT) Imagers
NOVAC
N.I.N.A. Users
Narrowband imaging
ZWO ASI2600MM Pro
Images from the EdgeHD Series

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
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Extremely wide field
Star trails
Northern lights
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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	7589580
PixInsight job	TLEIP166AOMZJ3D9258ND4TZE3B4G6IN
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	12h22m48s.368
RA (top/left)	12h23m38s.887
RA (top/right)	12h23m40s.501
RA (bottom/right)	12h21m57s.727
RA (bottom/left)	12h21m56s.599

Dec (center)	+15°43′10″.68
Dec (top/left)	+15°24′14″.78
Dec (top/right)	+16°01′52″.20
Dec (bottom/right)	+16°02′05″.40
Dec (bottom/left)	+15°24′31″.13

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M 100

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