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Contains:  M 81, Bode's nebulae, NGC 3031
Getting plate-solving status, please wait...
M81 in LRGB, 


            Chuck's Astrophot...
M81 in LRGB

M81 in LRGB

Technical card

Resolution: 2333x1733

Dates:March 16, 2018March 18, 2018March 20, 2018March 16, 2019April 9, 2019

Astronomik Blue: 73x60" (gain: 139.00) -20C bin 1x1
Astronomik Blue: 120x30" (gain: 75.00) -20C bin 1x1
Astronomik Green: 76x60" (gain: 139.00) -20C bin 1x1
Astronomik Green: 120x30" (gain: 75.00) -20C bin 1x1
Optolong L-pro: 600x30" (gain: 75.00) -20C bin 1x1
Astronomik Lum 1.25": 850x30" (gain: 139.00) -20C bin 1x1
Astronomik Red: 36x120" (gain: 139.00) -20C bin 1x1
Astronomik Red: 120x30" (gain: 75.00) -20C bin 1x1

Integration: 18.8 hours

Darks: ~50

Flats: ~50

Bias: ~50

Avg. Moon age: 9.20 days

Avg. Moon phase: 20.28% job: 2646058

RA center: 148.922 degrees

DEC center: 69.072 degrees

Pixel scale: 1.040 arcsec/pixel

Orientation: 274.503 degrees

Field radius: 0.420 degrees

Data source: Backyard


This seems to be the year of combining new data with my old data. I captured 8 hours of M81 this year and added it to the 10.8 hours of data from last year.



Chuck's Astrophot...
License: None (All rights reserved)


  • M81 in LRGB, 


            Chuck's Astrophot...
  • Final
    M81 in LRGB, 


            Chuck's Astrophot...


Color updates.

Sky plot

Sky plot


M81 in LRGB, 


            Chuck's Astrophot...