M101 Pinwheel galaxy (Mikael Lindkvist)

Celestial hemisphere: Northern · Constellation: Ursa Major (UMa) · Contains: M 101 · NGC 5447 · NGC 5449 · NGC 5450 · NGC 5451 · NGC 5453 · NGC 5455 · NGC 5457 · NGC 5461 · NGC 5462 · Pinwheel galaxy

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M101 Pinwheel galaxy

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M101 Pinwheel galaxy

Excerpt from wikipedia

The Pinwheel Galaxy (also known as Messier 101, M101 or NGC 5457) is a face-on spiral galaxy 21 million light-years (6.4 megaparsecs) away from Earth in the constellation Ursa Major.

M101 is a large galaxy, with a diameter of 170,000 light-years. By comparison, the Milky Way has a diameter of between 100,000 and 120,000 light-years. It has around a trillion stars.[13] It has a disk mass on the order of 100 billion solar masses, along with a small central bulge of about 3 billion solar masses.[14] Its characteristics can be compared to those of Andromeda Galaxy.

M101 is asymmetrical due to the tidal forces from interactions with its companion galaxies. These gravitational interactions compress interstellar hydrogen gas, which then triggers strong star formation activity in M101's spiral arms.

It is estimated that M101 has about 150 globular clusters, the same as the number of the Milky Way's globular clusters.

Constellation: Ursa Major
Distance: 20.9 ± 1.8 Mly
Apparent magnitude: 7.86
Number of stars: 1 trillion (10^12)
Size: ~170,000 ly in diameter

Platesolved focal length: 1383 mm

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
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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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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
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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	5576355
PixInsight job	P85KN6TY8747U0U6YC738GMMB12DLGLL
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	14h03m08s.860
RA (top/left)	14h02m07s.797
RA (top/right)	14h04m40s.130
RA (bottom/right)	14h04m10s.450
RA (bottom/left)	14h01m36s.823

Dec (center)	+54°22′40″.57
Dec (top/left)	+54°09′23″.75
Dec (top/right)	+54°13′48″.59
Dec (bottom/right)	+54°35′58″.44
Dec (bottom/left)	+54°31′30″.41

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M101 Pinwheel galaxy

M101 Pinwheel galaxy

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M101 Pinwheel galaxy

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