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



    
        

            Frédéric Tapissier
M81
Powered byPixInsight
Getting plate-solving status, please wait...
M81, 



    
        

            Frédéric Tapissier
M81
Powered byPixInsight

Technical card

Imaging telescopes or lenses: Skyvision Ritchey-Chrétien 10"

Imaging cameras: Sony A7s

Mounts: EQ8

Software: PixInsight  ·  photoshop


Dates:Nov. 28, 2016

Frames: 1300x30" (10h 50')

Integration: 10h 50'

Avg. Moon age: 28.62 days

Avg. Moon phase: 0.93%


Basic astrometry details

Astrometry.net job: 1382823

RA center: 09h55m34s.1

DEC center: +69°0303

Pixel scale: 0.851 arcsec/pixel

Orientation: 88.033 degrees

Field radius: 0.592 degrees


Resolution: 4168x2776

Locations: Longuesse ( SQM 20.09 ), Longuesse, Val d'oise, France

Description

M81 on 2 night 1300x 30s , but poor transparency, and big issue with flat

you can DL the original pixinsight picture ( .xisf files 32bit)

http://www.avex-asso.org/filerun/wl/?id=oYjpksSSzh8WBX5a0OWKrETlgZMuZXoX

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M81, 



    
        

            Frédéric Tapissier

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Avex