M100 Galaxy (Luís Ramalho)

Celestial hemisphere: Northern · Constellation: Coma Berenices (Com) · Contains: IC 783 · M 100 · NGC 4312 · NGC 4321 · NGC 4322 · NGC 4323 · NGC 4328

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M100 Galaxy

Link: http://www.astrosurf.com/ramalho/galaxias/m100/M100_20040320.htm

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M100 Galaxy

Link: http://www.astrosurf.com/ramalho/galaxias/m100/M100_20040320.htm

Montemor-o-Novo (Portugal)

The M100 galaxy (NGC4321), which can be seen in the direction of the Coma Berenice constellation, is located about 60 million light years away. It is of magnitude 9.4 and has a recession speed of 1543 Km / s. It is a galaxy of considerable size (6.8'x5.8 ') but not very defined and, except for the nucleus, with little surface luminosity (13 per square minute). This aspect is referred to by Dreyer who classifies it as "pretty faint", while the other galaxies in the Messier catalog usually appear as "very bright" or "bright". Only on exceptional nights can you guess your spiral arms. In reality, there are two: one leaves the East to reach the West from the North, while the other leaves the West to reach the East from the South. . It is noted in the image that in the spiral arms of the galaxy there are huge clusters. The blue stars in his arms are young, massive and hot stars, which have recently formed out of density disturbances caused by interaction with neighboring galaxies, visible in the image.

This galaxy was discovered on March 15, 1781 by Pierre Méchain together with the M98 and M99. His friend Charles Messier obtained his position on April 13, 1781 and included it in his catalog. M100 is one of the brightest galaxies in the Virgo Cumulus.

Galaxies

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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

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	Image of the day	Top pick	Top pick nominations	Total submitted
Deep sky
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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
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Amateur hosting facility
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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	4150575
PixInsight job	VU57B6C2Z15X4FJBR4QKGDOFXYSN544P
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	12h22m40s.19
RA (top/left)	12h24m09s.20
RA (top/right)	12h24m37s.27
RA (bottom/right)	12h21m11s.90
RA (bottom/left)	12h20m42s.50

Dec (center)	+15°49′58″.9
Dec (top/left)	+16°29′23″.1
Dec (top/right)	+15°15′08″.1
Dec (bottom/right)	+15°10′32″.3
Dec (bottom/left)	+16°24′46″.4

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M100 Galaxy

M100 Galaxy

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Contribution Index (beta):

M100 Galaxy

M100 Galaxy

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