Owl Nebula - M97 (Thomas Richter)

Celestial hemisphere: Northern · Constellation: Ursa Major (UMa) · Contains: M 97 · NGC 3587 · Owl nebula · PK148+57.1

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Owl Nebula - M97

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Owl Nebula - M97

Object description (wikipedia.org):

The Owl Nebula (also known as Messier 97, M97 or NGC 3587) is a planetary nebula located approximately 2,030 light years away in the constellation Ursa Major. It was discovered by French astronomer Pierre Méchain on February 16, 1781. When William Parsons, 3rd Earl of Rosse, observed the nebula in 1848, his hand-drawn illustration resembled an owl's head. It has been known as the Owl Nebula ever since.

The nebula is approximately 8,000 years old. It is approximately circular in cross-section with a little visible internal structure. It was formed from the outflow of material from the stellar wind of the central star as it evolved along the asymptotic giant branch. The nebula is arranged in three concentric shells, with the outermost shell being about 20–30% larger than the inner shell. The owl-like appearance of the nebula is the result of an inner shell that is not circularly symmetric, but instead forms a barrel-like structure aligned at an angle of 45° to the line of sight.

The nebula holds about 0.13 solar masses of matter, including hydrogen, helium, nitrogen, oxygen, and sulfur; all with a density of less than 100 particles per cubic centimeter. Its outer radius is around 0.91 ly (0.28 pc) and it is expanding with velocities in the range of 27–39 km/s into the surrounding interstellar medium.

Nuremberg Public Observatory
Astrofreunde-Franken

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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.
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Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
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Status	Advanced success
Started	...
PixInsight job	FYVKCW2294GJE0BB7RMKIXZNHOOI0DEO
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	11h14m47s.397
RA (top/left)	11h13m19s.248
RA (top/right)	11h13m01s.300
RA (bottom/right)	11h16m13s.862
RA (bottom/left)	11h16m35s.487

Dec (center)	+55°00′46″.96
Dec (top/left)	+55°23′03″.31
Dec (top/right)	+54°40′17″.68
Dec (bottom/right)	+54°38′26″.94
Dec (bottom/left)	+55°21′08″.95

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Owl Nebula - M97

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