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M81 (NGC 3031 or Bode's Galaxy), M82 (NGC 3034, Cigar Galaxy)

Technical card

Resolution: 4721x2950

Dates: May 23, 2015

Frames: 105x30" ISO1600

Integration: 0.9 hours

Darks: ~25

Avg. Moon age: 4.89 days

Avg. Moon phase: 24.73%

Astrometry.net job: 667999

RA center: 148.905 degrees

DEC center: 69.301 degrees

Pixel scale: 0.987 arcsec/pixel

Orientation: -79.624 degrees

Field radius: 0.763 degrees

Description

M81 and M82 are a pair of galaxies in the constellation Ursa Major. The pair are located approximately 10 degrees northwest of the "Big Dipper" pointer star Dubhe (Alpha Ursae Majoris). The apparent separation of the galaxies is 31 arc-minutes but at a distance of 12 million light-years, their actual distances from each other is 150,000 light years. They are the largest members of the M81 Group, a physical association of of 34 galaxies.

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Author

Ron Bokleman
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M81 (NGC 3031 or Bode's Galaxy), M82 (NGC 3034, Cigar Galaxy), Ron Bokleman

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