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Contains:  M 82, NGC 3034, M 81, Bode's nebulae, NGC 3031
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Galaxies M81 and M82, 


            Steven Bellavia
Galaxies M81 and M82

Galaxies M81 and M82

Technical card

Resolution: 3000x2000

Dates:Feb. 24, 2019Feb. 26, 2019Feb. 27, 2019

Astronomik 6nm OIII: 7x300" (gain: 140.00) -15C bin 1x1
Optolong 7nm Ha 2": 19x300" (gain: 140.00) -15C bin 1x1
Baader Semi-APO 2": 10x120" (gain: 111.00) -15C bin 1x1

Integration: 2.5 hours

Darks: ~25

Avg. Moon age: 21.80 days

Avg. Moon phase: 53.52%

Bortle Dark-Sky Scale: 4.00

Temperature: -2.33 job: 2551492

RA center: 9h 55' 50"

DEC center: +69° 19' 33"

Pixel scale: 1.363 arcsec/pixel

Orientation: 85.469 degrees

Field radius: 0.683

Data source: Backyard


Galaxies M81 and M82, located in Ursa Major at 12 million light years away, are interacting, via gravity. They are separated by 150,000 light years.
M81 (NGC 3031, also known as Bode's Nebula) is a spiral galaxy,with a diameter of 90,000 light years, about half the size of the Milky Way
M82 (NGC 3034, also known as the Cigar Galaxy) is a starburst galaxy. It is about five times more luminous than the whole Milky Way and has a center one hundred times more luminous than our galaxy's center. The starburst activity is thought to have been triggered by interaction with neighboring galaxy M81.
Messier 81 and Messier 82 can both be viewed easily using binoculars and small telescopes



Steven Bellavia
License: None (All rights reserved)

Sky plot

Sky plot


Galaxies M81 and M82, 


            Steven Bellavia