M51 - The Whirlpool Galaxy (Flemming Kristensen)

Celestial hemisphere: Northern · Constellation: Canes Venatici (CVn) · Contains: IC 4277 · IC 4278 · M 51 · NGC 5194 · NGC 5195 · Whirlpool Galaxy

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M51 - The Whirlpool Galaxy

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M51 - The Whirlpool Galaxy

Messier 51 is actually a pair of galaxies, NGC 5194 (M51) and the smaller NGC 5195, which are interacting gravitationally, or colliding. The interaction has caused markedly different changes in the two galaxies. The larger NGC 5194 is undergoing furious star formation in the spiral arms, causing them to appear blue, due to the many hot, blue young stars. Star formation in NGC 5195 has stopped because the galaxy has been stripped of its cold hydrogen gas, possibly by the collision, and its massive stars has gone supernova many millions of years ago, leaving only the low mass yellow and red stars behind. Most of its disk has been spread out in intergalactic space in long streamers of faint yellow stars easily seen in this image.
The galaxy pair is more than 30 million lightyears away.

IOptron CEM
Ritchey Chretien telescopes GSO Family
Astrophotographers Denmark
ZWO ASI 2600MC PRO
The OSC Club (One Shot Camera)

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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
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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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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
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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	5689362
PixInsight job	0MFCFDHMQSX287V8VM9CTLI27YMAH8ZM
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	13h29m48s.110
RA (top/left)	13h31m43s.603
RA (top/right)	13h27m53s.322
RA (bottom/right)	13h27m53s.436
RA (bottom/left)	13h31m41s.222

Dec (center)	+47°11′55″.50
Dec (top/left)	+47°24′48″.98
Dec (top/right)	+47°25′00″.99
Dec (bottom/right)	+46°58′56″.37
Dec (bottom/left)	+46°58′47″.35

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M51 - The Whirlpool Galaxy

M51 - The Whirlpool Galaxy

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M51 - The Whirlpool Galaxy

M51 - The Whirlpool Galaxy

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