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Contains:  M 81, Bode's nebulae, NGC 3031
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Bodes "Nebula", Galaxy M81, 





    
        

            Steven Bellavia
Bodes "Nebula", Galaxy M81

Bodes "Nebula", Galaxy M81

Technical card

Resolution: 2700x1800

Dates:Jan. 6, 2019Jan. 25, 2019

Frames:
Optolong L: 12x300" (gain: 100.00) -15C bin 2x2
Baader Semi-APO 2": 40x180" (gain: 100.00) -15C bin 1x1

Integration: 3.0 hours

Darks: ~21

Avg. Moon age: 10.02 days

Avg. Moon phase: 37.78%

Bortle Dark-Sky Scale: 4.00

Temperature: -5.00

Astrometry.net job: 2487852

RA center: 9h 55' 32"

DEC center: +69° 3' 50"

Pixel scale: 1.066 arcsec/pixel

Orientation: 357.857 degrees

Field radius: 0.480

Data source: Backyard

Description

Bodes "Nebula" , Messier object M81, is actually a spiral galaxy about 12 million light-years away, with at diameter of 90,000 light years, about half the size of the Milky Way, in the constellation Ursa Major.
Messier 81 was first discovered by Johann Elert Bode on December 31, 1774. Consequently, the galaxy is sometimes referred to as "Bode's Galaxy". In 1779, Pierre Méchain and Charles Messier reidentified Bode's object, which was subsequently listed in the Messier Catalogue. Messier 81 is located approximately 10° northwest of Alpha Ursae Majoris along with several other galaxies in the Messier 81 Group.

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Author

bellavia
Steven Bellavia
License: None (All rights reserved)
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Bodes "Nebula", Galaxy M81, 





    
        

            Steven Bellavia