m101 HaLRGB (Valerio Avitabile)

Celestial hemisphere: Northern · Constellation: Ursa Major (UMa) · Contains: HD122865 · M 101 · NGC 5447 · NGC 5449 · NGC 5450 · NGC 5451 · NGC 5453 · NGC 5455 · NGC 5457 · NGC 5461 · NGC 5462 · NGC 5471 · Pinwheel galaxy

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m101 HaLRGB

Link: www.valerioavitabile-astrophotography.it

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m101 HaLRGB

Link: www.valerioavitabile-astrophotography.it

M101, located in the direction of the constellation Ursa Major, is undoubtedly one of the best known and most photographed galaxies in the entire northern hemisphere. It lies more than 20 million light years from us and appears almost perfectly in front of us, revealing the structures of its spiral arms. Discovered in 1781 by the French astronomer Charles Messier, M101 has an extension and an overall mass far greater than our galaxy, the Milky Way. Although considered one of the most classical examples of a spiral galaxy, M101 shows an obvious asymmetry in its structure: astronomers believe it to be the aftermath of a past gravitational interaction with another passing galaxy.

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	5966235
PixInsight job	BQN0H2VXMWAHZOM9W0L5SOQJDU1NPGN2
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	14h03m13s.452
RA (top/left)	14h01m26s.365
RA (top/right)	14h01m20s.684
RA (bottom/right)	14h04m57s.759
RA (bottom/left)	14h05m08s.322

Dec (center)	+54°20′54″.81
Dec (top/left)	+54°44′55″.44
Dec (top/right)	+53°57′33″.74
Dec (bottom/right)	+53°56′42″.81
Dec (bottom/left)	+54°44′10″.23

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m101 HaLRGB

m101 HaLRGB

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Image Index:

Contribution Index (beta):

m101 HaLRGB

m101 HaLRGB

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

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