AstroPhotography by Dan Richey

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Messier 81 (also known as NGC 3031 or Bode's Galaxy) is a spiral galaxy about 12 million light-years away 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

Object Information

Name M81
Type Spiral Galaxy
Constellation Ursa Major
Catalogue M81 / NGC 3031

Acquisition / Processing

Exposure L -30x120 sec Bin1
RGB -20 x120 sec each Bin 1

Total 3.00 Hr
Telescope AP 160 EDF
Camera SBIG STT-8300
Camera Temp -40ºC
Guiding AP105/SG4
Mount AP 1100GTO
Filters Astrodon LRGB
Processing PixInsight. PhotoShop CS5. LightRoom. Cropped
Location San Pedro Creek
Date February 20, 2017

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