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Contains:  M 82, NGC 3034, M 81, Bode's nebulae, NGC 3031
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M81 and M82, 


            Michael Feigenbaum
M81 and M82

M81 and M82

Technical card

Resolution: 3662x2686

Dates:Feb. 16, 2019Feb. 27, 2019

Baader UV/IR-Cut/L Filter: 256x120" (gain: 110.00) -20C
Astronomik H Alpha 12 nm: 63x300" (gain: 139.00) -20C

Integration: 13.8 hours

Darks: ~32

Flats: ~48

Bias: ~500

Avg. Moon age: 17.11 days

Avg. Moon phase: 62.90%

Bortle Dark-Sky Scale: 4.00 job: 2558836

RA center: 148.918 degrees

DEC center: 69.318 degrees

Pixel scale: 0.978 arcsec/pixel

Orientation: 268.800 degrees

Field radius: 0.617 degrees

Locations: Papago Butte, near Maricopa, AZ, United States

Data source: Backyard


One of the winter mainstays... I did this using a fast Newt for the Ha and the small refractor for the RGB and combined them.

I saw no IFN in any of my frames, I guess it's just not dark enough here. But I do like the image although I may add some more integration to this. When the weather permits of course.

I have some strange artifacts on the brighter stars that result from the use of PI Deconvolution. I like what the process does for images in general but these artifacts are not good. Must be something I'm doing wrong.



Michael Feigenbaum
License: None (All rights reserved)

Sky plot

Sky plot


M81 and M82, 


            Michael Feigenbaum

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