M101: Spiral Galaxy in Ursa Major



Object Data

Object type: Galaxy
Size: 29 x 27 arcmin
Magnitude: 7.9
Constellation: Ursa Major
Distance: 21 million light years

M101 is noted for its high population of large and bright HII regions. H II regions contain enormous clouds of high density molecular hydrogen gas contracting under their own gravitational force triggering strong star formation.  These regions appear red in the current image.

Exposure Data

Date: 04/30/22
Location: Lockwood Observatory 2, Descanso,  CA
Telescope: DSI RC10c; fl 1867mm at f/7.3
Camera: FLI 6303e with Astrodon LRGB filters
Mount: AP1100 GTO3
Exposure time: 8 x 15 min of Lum (2 hrs), 4 x 10 min each RGB (120 min)
Exposure time total: 4 hrs
Imaged during inaugural weekend at new Observatory

Cropped. FOV = 36.9 x 31.2 arcmin.  Image Scale - 0.99 arcsec/pixel


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