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M81 ("Bode's nebula")


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About this observation
Les Dickens
Time of observation
18/01/2020 - 04:45
M81 ("Bode's nebula")
Observing location
Cheltenham, Glos. 51° 53' 01" N, 02° 05' 42" W
125mm f/15 Maksutov-cassegrain
200mm f/6 Newtonian
QHY9s mono CCD camera
Processed with IRIS software
55 x 120s luminance; 7 x 120s each of RGB
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Not many clear nights so far,  this winter.  I took the white light images for this over 2 days - one in Dec 2019 and one in Jan 2020 - using a 125mm f/15 Maksutov.  After a week or so waiting for another clear night, I gave up and pinched the RGB frames from a previous session in Mar 2019, taken with a 200mm f/6 Newtonian.  Scaling and realigning the RGB images (~90° difference in alignment) was an entertaining exercise, but it seems to have turned out OK.


Clive Nanson's picture

I thought I was the only one still using IRIS!

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