Hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  Bode's Galaxy  ·  Cigar Galaxy  ·  M 81  ·  M 82  ·  NGC 2976  ·  NGC 3031  ·  NGC 3034  ·  NGC 3077
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M81-M82 High Resolution, Wide Field, 



    
        

            Steven Bellavia
M81-M82 High Resolution, Wide Field
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M81-M82 High Resolution, Wide Field

Getting plate-solving status, please wait...
M81-M82 High Resolution, Wide Field, 



    
        

            Steven Bellavia
M81-M82 High Resolution, Wide Field
Powered byPixInsight

M81-M82 High Resolution, Wide Field

Technical card

Imaging telescopes or lenses: Borg 90FL

Imaging cameras: ZWO ASI 294MM Pro (cooled)

Mounts: Sky-Watcher EQ-6R Pro SynScan

Guiding telescopes or lenses: The Bellavia Basic-II 50mm f/7.5 guidescope

Guiding cameras: ZWO ASI 290MC

Focal reducers: Borg 0.72X Quadruplet Super Reducer, #7872

Filters: L


Dates:March 6, 2021

Frames:L: 20x90" (30') (gain: 60.00) -10C bin 1x1

Integration: 30'

Darks: ~30

Flats: ~30

Flat darks: ~30

Avg. Moon age: 22.60 days

Avg. Moon phase: 45.18%

Bortle Dark-Sky Scale: 4.00

Mean SQM: 20.50

Mean FWHM: 3.80

Temperature: -3.00


Basic astrometry details

Astrometry.net job: 4286275

RA center: 9h 55' 51"

DEC center: +69° 20' 31"

Pixel scale: 1.343 arcsec/pixel

Orientation: 88.666 degrees

Field radius: 1.815 degrees


Resolution: 8034x5493

Data source: Backyard

Description

A wide-field, high-resolution image of the area around M81-M82
What is nice about a 47-million pixel image is that you can zoom in and look around.
I highlighted some of the other galaxies that are hiding in this field of view.
What is interesting (to me) is the span of distances to these little faint fuzzies.  The three "main" galaxies of the image, the well-known M81, M82 and NGC 3077, are approximately 12 to 13 million lightyears distant.  And in the same field of view, but nowhere close to these galaxies in reality, there are galaxies over 200 million light years away.
But the most interesting thing (to me), in the lower left corner, is a dwarf galaxy, very close to our own Milky Way, that is "only" 114,000 light years distant.  This is even closer than "our" (the Milky way's)  dwarf satellite galaxies, the Large and Small Magellanic Clouds, which are 160,000 lightyears away.

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  • M81-M82 High Resolution, Wide Field, 



    
        

            Steven Bellavia
    Original
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    M81-M82 High Resolution, Wide Field, 



    
        

            Steven Bellavia
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M81-M82 High Resolution, Wide Field, 



    
        

            Steven Bellavia