Celestial hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  22 UMa  ·  24 d UMa  ·  27 UMa  ·  Bode's Galaxy  ·  Cigar Galaxy  ·  M 81  ·  M 82  ·  NGC 2959  ·  NGC 2961  ·  NGC 2985  ·  NGC 3027  ·  NGC 3031  ·  NGC 3034  ·  The star 22UMa  ·  The star 24UMa  ·  The star 27UMa
Getting plate-solving status, please wait...
M81 IFN wide field, 



    
        

            Andrei Gusan
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M81 IFN wide field

Getting plate-solving status, please wait...
M81 IFN wide field, 



    
        

            Andrei Gusan
Powered byPixInsight

M81 IFN wide field

Acquisition details

Frames:
Astronomik 1.25" L-2 UV+IR: 248×240(16h 32′) (gain: 120.00) -20°C bin 1×1
Astronomik B 1.25": 73×180(3h 39′) (gain: 120.00) -20°C bin 1×1
Astronomik G 1.25": 82×180(4h 6′) (gain: 120.00) -20°C bin 1×1
Astronomik R 1.25": 73×180(3h 39′) (gain: 120.00) -20°C bin 1×1
Integration:
27h 56′
Bortle Dark-Sky Scale:
4.00

RA center: 09h45m47s.86

DEC center: +70°2656.6

Pixel scale: 1.927 arcsec/pixel

Orientation: -93.220 degrees

Field radius: 2.414 degrees

WCS transformation: thin plate spline

More info:Open 

Resolution: 7614x4828

File size: 15.6 MB

Data source: Backyard

Description

Messier 81 (Bode's Galaxy) is a spiral galaxy about 12 million light-years away, in the constellation Ursa Major. Messier 82 (also known as Cigar Galaxy) is a starburst galaxy and is being physically affected by its larger neighbour, the spiral M81. Tidal forces caused by gravity have deformed M82 and this interaction has caused star formation to increase.

Most images of M81 and M82 will show the two galaxies, the surrounding stars and a few smaller galaxies here and there. But a deeper exposure will reveal that these galaxies appear wrapped in a thin nebulosity. This is the integrated flux nebula (IFN). A very very faint glow caused by the combined light of the stars of our home galaxy The Milky Way reflected and re-emitted by interstellar gas and dust.

The galaxies are not surrounded by this dust as dust is much closer to us than the galaxies - it just happens to look that way. Kind of like looking at the moon on a partially cloudy night.

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M81 IFN wide field, 



    
        

            Andrei Gusan