Celestial hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  M 108  ·  M 97  ·  NGC 3556  ·  NGC 3587  ·  NGC 3594  ·  Owl Nebula
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M97 & M108 - The Owl Nebula and Surfboard Galaxy, Doug Gray
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M97 & M108 - The Owl Nebula and Surfboard Galaxy

Getting plate-solving status, please wait...
M97 & M108 - The Owl Nebula and Surfboard Galaxy, Doug Gray
Powered byPixInsight

M97 & M108 - The Owl Nebula and Surfboard Galaxy

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Description

From Wikipedia:
"The Owl Nebula (also known as Messier 97, M97 or NGC 3587) is a starburst ("planetary") nebula approximately 2,030 light years away in the northern constellation Ursa Major. The estimated age of the Owl Nebula is about 8,000 years. It is approximately circular in cross-section with faint 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/envelopes, with the outermost shell being about 20–30% larger than the inner shell. A mildly 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.

Messier 108 (also known as NGC 3556) is a barred spiral galaxy about 28 million light-years away from Earth in the northern constellation Ursa Major. It was discovered by Pierre Méchain in 1781 or 1782. From the Earth, this galaxy is seen almost edge-on. This galaxy is an isolated member of the Ursa Major Cluster of galaxies in the local supercluster. It has a morphological classification of type SBbc in the de Vaucouleurs system, which means it is a barred spiral galaxy with somewhat loosely wound arms. The maximum angular size of the galaxy in the optical band is 11′.1 × 4′.6, and it is inclined 75° to the line of sight."

I've captured these targets in both RGB and Ha/OIII, but decided to only post the RGB version of the pair for now. I think they both look quite interesting in RGB as is. While they both have signficant Ha/OIII signal, I'm planning to crop M97 in the narrowband version to focus on the outer halo.

Lots of other little gems in this area too. UGC 6211 (top center left) was hard to identify, as the coordinates in Stellarium are wrong. PGC 34197 & PGC 34177 are interesting too as they are right on the edge of the bright star HD 97455.

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M97 & M108 - The Owl Nebula and Surfboard Galaxy, Doug Gray