Messier 81

110. Messier 81


Messier 81  RA: 9h 55.6'  Dec: +69 04'   Ursa Major (UMa)

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Messier 81 (also known as NGC 3031 or Bode's Galaxy) is a grand design spiral galaxy about 12 million light-years away, with a diameter of 90,000 light years, about half the size of the Milky Way, in the constellation Ursa Major. Due to its proximity to Earth, large size, and active galactic nucleus (which harbors a 70 million M☉supermassive black hole), Messier 81 has been studied extensively by professional astronomers. The galaxy's large size and relatively high brightness also makes it a popular target for amateur astronomers.



 
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NGC 3077 is a small member of the M81 Group, which is located in the northern constellation Ursa Major. It looks much like an elliptical galaxy. However, it is peculiar for two reasons. First, it shows wispy edges and scattered dust clouds that are probably a result of gravitational interaction with its larger neighbors, similar to the galaxy M82. Second, this galaxy has an active nucleus. This caused Carl Seyfert in 1943 to include it in his list of galaxies, which are now called Seyfert Galaxies. However, NGC 3077, though an emission line galaxy, is today no longer classified as a Seyfert galaxy.


Main Image Information

Location Texas Star Party
Date May 4 2016
Optics Orion 10 f/3.9
Filters Baader MPCC
Mount Celestron CGE
Camera Nikon D810A
ISO 1600
Subexposures 10
Exposure Length 300
Guider KwiqGuider
 

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Main text descriptions sourced from Wikipaedia.
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