Celestial hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  Bode's Galaxy  ·  HD85458  ·  M 81  ·  NGC 3031
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M81, Jeff Weiss
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M81

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M81, Jeff Weiss
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M81

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Description

M81 (Bode's Galaxy) 12.7hr HaLRGB

Prominent spiral in Ursa Major at 12MLY distance, a little more massive than the Milky Way yet containing very little dark matter.

L: 6.0 hrs (8min), RGB 1.6 hrs each (4min 2x2), Ha: 2.0 hrs (8min)

Location: D.A.R.C. Obs, Mercey Hot Springs CA 2/9/13, 3/9/13 Montebello O.S.P., CA 2/14/13 Henry Coe St. Park, CA 3/13/13

1/17/24: This 6hrs of 2014 data data is included in a 22hr updated version  from 2020 posted at:
https://www.astrobin.com/i5fl1a

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M81, Jeff Weiss