Cookie consent

AstroBin saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing AstroBin without changing the browser settings, you grant us permission to store that information on your device.

I agree
Contains:  M 81, Bode's nebulae, NGC 3031
Getting plate-solving status, please wait...

M 81 (NGC 3031) with Holmberg IX Dwarf Galaxy and IFN (Integrated Flux Nebulae), HaLRGB Image

Technical card

Resolution: 3486x2583

Dates:March 19, 2015March 20, 2015March 21, 2015March 22, 2015March 23, 2015March 24, 2015March 25, 2015

Astrodon Blue Tru-Balance E-Series Gen 2: 18x1800" bin 1x1
Astrodon Green Tru-Balance E-Series Gen 2: 12x1800" bin 1x1
Astrodon H-alpha 3 nm: 14x1800" bin 1x1
Astrodon Luminance Tru-Balance E-Series Gen 2: 22x1800" bin 1x1
Astrodon Red Tru-Balance E-Series Gen 2: 20x1800" bin 1x1

Integration: 43.0 hours

Avg. Moon age: 6.56 days

Avg. Moon phase: 10.89% job: 1862027

RA center: 148.866 degrees

DEC center: 69.091 degrees

Pixel scale: 0.506 arcsec/pixel

Orientation: 15.134 degrees

Field radius: 0.305 degrees

Locations: Sierra Remote Observatories, Shaver Lake, California, United States


It's been 2.5 years since we collected these data. A lot has changed in processing and I thought it would be worthwhile to re-process these data. Here is the result.



Eric Coles (coles44)


Sky plot

Sky plot


M 81 (NGC 3031) with Holmberg IX Dwarf Galaxy and IFN (Integrated Flux Nebulae), HaLRGB Image, 


            Eric Coles (coles44)