M-81 (Eric Kallgren)

Celestial hemisphere: Northern · Constellation: Ursa Major (UMa) · Contains: Bode's Galaxy · M 81 · NGC 3031

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M-81

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M-81

Messier 81 (M81), also known as Bode’s Galaxy, is a grand design spiral galaxy located in the constellation Ursa Major. The galaxy lies at an approximate distance of 11.8 million light years from Earth and has an apparent magnitude of 6.94. It has the designation NGC 3031 in the New General Catalogue.

Messier 81 occupies an area of 26.9 by 14.1 arc minutes of apparent sky, which corresponds to a linear diameter of about 90,000 light years. It can easily be seen in binoculars, which only show a dim patch of light, and is best viewed in larger telescopes, which reveal details of the galaxy’s spiral structure. 3-inch telescopes show M81 as a hazy, bright oval-shaped patch of light, while 6-inch telescopes reveal the galaxy’s bright core surrounded by a faint halo.

Bode’s Galaxy can be found about 10 degrees northwest of Dubhe, Alpha Ursae Majoris. An imaginary line drawn from Phecda, Gamma Ursae Majoris to Dubhe and extended by roughly the same distance as that between the stars leads to M81.

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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	5122249
PixInsight job	6NOXTCNZDM7LXSVG19SE2F7IJ5SKNIGP
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	09h55m35s.501
RA (top/left)	09h58m20s.150
RA (top/right)	09h58m23s.865
RA (bottom/right)	09h52m46s.990
RA (bottom/left)	09h52m52s.102

Dec (center)	+69°04′01″.96
Dec (top/left)	+68°44′07″.76
Dec (top/right)	+69°23′46″.90
Dec (bottom/right)	+69°23′44″.49
Dec (bottom/left)	+68°44′04″.37

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