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:  IC 2574, M 82, NGC 3034, M 81, Bode's nebulae, NGC 3031, The star 27UMa, The star 24UMa, The star 22UMa
Getting plate-solving status, please wait...

Reference image: 22 members of the M81 galaxy Group

Technical card

Resolution: 9218x10945

Dates:Feb. 1, 2019

Frames:Baader Luminance: 1100x300" (gain: 1.00) -20C bin 1x1

Integration: 91.7 hours

Darks: ~120

Flats: ~50

Bias: ~256

Avg. Moon age: 26.50 days

Avg. Moon phase: 10.01%

Mean SQM: 20.80 job: 3079905

RA center: 150.795 degrees

DEC center: 68.996 degrees

Pixel scale: 2.202 arcsec/pixel

Orientation: 0.982 degrees

Field radius: 4.377 degrees

Locations: Knight Observatory,Quinta Castelo Novo, Serra de Tomar, Portugal

Data source: Backyard


I wanted to annotate my mosaic data (ref.6) with the M81 group members as listed in the Wikipedia article (ref. 1) and found extra information in a number of articles (ref. 2-5) that i used for a visual match with images made with large telescopes. This was not an easy task, but i could add/annotate 22 members ( of >33 in total). In image revision "Original" you can find a version also annotated with PGC catalog numbers. The image needs to be viewed in full resolution (to be able to read the text and see the actual dwarf galaxies.......).

ref.1:"Wikipedia: The M81 group"

ref. 2:"The M 81 group of galaxies: New distances, kinematics and structure"

ref.3:"Dwarf spheroidal galaxies in the M81 group imaged with WFPC2"

ref.4:"Discovery of new dwarf galaxies in the M81 group"

ref.5:"New Hydrogen Clouds in the M81 Group of Galaxies"

ref.6:"Volcano and Angel, Mandel-Wilson 15 panel annotated version"

ref.7:"DD78 and it's Globular Cluster, members of the M81 group"



Kees Scherer
License: Attribution Creative Commons



M81 group annotations only.

Sky plot

Sky plot


Reference image: 22 members of the M81 galaxy Group, 


            Kees Scherer

In these public groups

Cloudy Nights
Deep Sky Mosaics