Hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  Bode's nebulae  ·  M 81  ·  M 82  ·  NGC 3031  ·  NGC 3034
M81 M82, 



    
        

            Doug MacDonald
M81 M82
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M81 M82

M81 M82, 



    
        

            Doug MacDonald
M81 M82
Powered byPixInsight

M81 M82

Technical card

Imaging telescopes or lenses: Expore Scientific 127mm APO refractor 127ED

Imaging cameras: ZWO ASI183MM Pro

Mounts: iOptron CEM60 cem60

Guiding telescopes or lenses: Starwave 50 mm guidescope

Guiding cameras: Altair GPCAM MONO BASIC Guide Imaging Camera

Software: Starkeeper.it VOYAGER  ·  PixInsight 1.8 Ripley PixInsight  ·  PHD 2 Guiding

Filters: Optolong H-Alpha 7nm  ·  RGB Optolong


Dates:March 2, 2019

Frames: 55x60" (55')

Integration: 55'

Avg. Moon age: 25.82 days

Avg. Moon phase: 14.81%


Basic astrometry details

Astrometry.net job: 3206032

RA center: 9h 55' 8"

DEC center: +69° 18' 36"

Pixel scale: 0.730 arcsec/pixel

Orientation: 257.778 degrees

Field radius: 0.643 degrees


Resolution: 5343x3411

Data source: Backyard

Description

A quick look at this lovely galaxy pair in Ursa Major. Just over 2 hours of data. I was hoping to show the asymmetrical nature of M81, where the spiral arms are "swept up" out of the plane of the spiral.

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Sky plot

Sky plot

Histogram

M81 M82, 



    
        

            Doug MacDonald