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Contains:  M 82, NGC 3034, M 81, Bode's nebulae, NGC 3031
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Bode's Galaxies (Messier 81 & 82), 





    
        

            Miles Zhou
Bode's Galaxies (Messier 81 & 82)

Technical card

Imaging telescope or lens:Takahashi FSQ-106N

Imaging camera:Apogee U16M

Resolution: 1191x917

Dates:Jan. 22, 2013

Frames: 30x300"

Integration: 2.5 hours

Avg. Moon age: 10.50 days

Avg. Moon phase: 80.80%

Astrometry.net job: 174592

RA center: 149.036 degrees

DEC center: 69.349 degrees

Pixel scale: 3.527 arcsec/pixel

Orientation: 87.740 degrees

Field radius: 0.736 degrees

Locations: Xingming, Wulumuqi, Xingjiang, China

Description

Messier 81 & 82
by CSP of Xingming Observatory.
LRGB
L: 15x300s
RGB: 5x300s each
Processing Regular LRGB combination with an exception: because the L was taken earlier while the moon is still on the sky, the signal-to-noise ratio of the L component is even lower than RGB's. So, I created the luminance layer by combining the luminance information from RGB and the L component (actually, L contributed less than RGB's).

Drizzle by 2 since Version B.

Comments

Author

mileszhou
Miles Zhou
License: None (All rights reserved)
1390
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Revisions

  • Bode's Galaxies (Messier 81 & 82), 





    
        

            Miles Zhou
    Original
  • Bode's Galaxies (Messier 81 & 82), 





    
        

            Miles Zhou
    B
  • Final
    Bode's Galaxies (Messier 81 & 82), 





    
        

            Miles Zhou
    C

Sky plot

Sky plot

Histogram

Bode's Galaxies (Messier 81 & 82), 





    
        

            Miles Zhou