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Contains:  M 81, Bode's nebulae, NGC 3031
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M81, second version of a LRHaGB crowd picture

Technical card

Resolution: 1179x1052

Dates:March 18, 2018April 1, 2018


Integration: 9.1 hours

Avg. Moon age: 8.36 days

Avg. Moon phase: 49.92% job: 1995489

RA center: 148.886 degrees

DEC center: 69.062 degrees

Pixel scale: 1.693 arcsec/pixel

Orientation: 3.445 degrees

Field radius: 0.371 degrees


M81 a LRHaGB-color picture from Denmark, Sjaelland area.

A kind of a crowd-imaging picture with few pictures/stacks integrated into one cropped color picture.

It's the second version of a M81 crowd picture, where I have used Morten la Cours FOV as a reference for integration/re-scale of the other pictures FOV.

Colors and luminance background in this picture are taken from the first M81 crowd version here:

Except the Red/Ha blend feature, where I used Mortens Ha info./exposures.
Niels Haagh's rgb stacks used as a color layer/info. (with a given opacity) and as an artificial lum stack.

Main contributers for this picture:
Mr. Morten la Cour
Exposure details & subs taken 18 March & 1 April-2018:
L=20x300sec + 19x15sec

Mr. Niels Haagh
Exposure details & subs taken 18/19 March-2018:

Integration of the individuel contributers calibrated LRGB,Ha,color stacks was done by me,
where I used CCDStack2, RegiStar and Adobe Photoshop CS6 programs/features.

Stack info. available (as 16bit Tiff) if needed/on request.
Kind regards Niels



Niels V. Christensen
License: None (All rights reserved)

Sky plot

Sky plot


M81, second version of a LRHaGB crowd picture, 


            Niels V. Christensen