Hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  Bode's nebulae  ·  M 81  ·  M 82  ·  NGC 3031  ·  NGC 3034  ·  NGC 3077
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M 81 & 82 ("Bode's Nebulae") - HaRGB, 



    
        

            gigiastro
M 81 & 82 ("Bode's Nebulae") - HaRGB
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M 81 & 82 ("Bode's Nebulae") - HaRGB

Getting plate-solving status, please wait...
M 81 & 82 ("Bode's Nebulae") - HaRGB, 



    
        

            gigiastro
M 81 & 82 ("Bode's Nebulae") - HaRGB
Powered byPixInsight

M 81 & 82 ("Bode's Nebulae") - HaRGB

Technical card

Imaging telescopes or lenses: Canon EF 400mm f/5,6L USM

Imaging cameras: Canon EOS 60Da

Mounts: iOptron ZEQ25GT

Software: PixInsight  ·  Noel Carboni's AstroFlat Pro  ·  DeepSkyStacker 3.3.4  ·  Noel Carboni's StarSpikes Pro 4  ·  Noel Carboni's Actions  ·  Elements Photoshop

Filters: Astronomik H-alpha 12nm CCD Clip-Filter EOS


Dates:Jan. 15, 2019Feb. 5, 2019

Frames:
730x30" (6h 5') ISO1600
Astronomik H-alpha 12nm CCD Clip-Filter EOS: 490x30" (4h 5') ISO1600

Integration: 10h 10'

Darks: 10

Flats: 30

Flat darks: 12

Bias: 80

Avg. Moon age: 4.56 days

Avg. Moon phase: 31.38%

Bortle Dark-Sky Scale: 8.00

Temperature: 4.00


Basic astrometry details

Astrometry.net job: 2534256

RA center: 9h 55' 20"

DEC center: +69° 16' 44"

Pixel scale: 2.260 arcsec/pixel

Orientation: 356.578 degrees

Field radius: 1.785 degrees


Resolution: 4956x2788

Locations: Home, Mestre, Venezia, Italy

Data source: Backyard

Description

Gravitational interactions of M81 with M82 ("Cigar Galaxy" and NGC 3077 have stripped hydrogen gas away from all three galaxies, forming gaseous filamentary structures in the group.

Moreover, these interactions have allowed interstellar gas to fall into the centers of M82

and NGC 3077, leading to vigorous star formation or starburst activity there.

(Wikipedia)

The faint companion of M 81 Holmberg IX (UGC 5336) is also visible

(It is suspected that this dwarf galaxy was created as a result of a close encounter

that M81 would have had with M82 about 200 ~ 300 million years ago)

cropping from original picture of 5202x3465 resolution

(unguided)

Comments

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M 81 & 82 ("Bode's Nebulae") - HaRGB, 



    
        

            gigiastro