Celestial hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  Bode's nebulae  ·  M 81  ·  M 82  ·  NGC 3031  ·  NGC 3034
M81 & M82 reloaded : old and new subs..., 


M81 & M82 reloaded : old and new subs...
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M81 & M82 reloaded : old and new subs...

Acquisition details

Sept. 7, 2015
30×300(2h 30′)
2h 30′
Avg. Moon age:
24.21 days
Avg. Moon phase:

Basic astrometry details

Astrometry.net job: 766264

RA center: 09h55m36s.7

DEC center: +69°1832

Pixel scale: 1.016 arcsec/pixel

Orientation: -170.200 degrees

Field radius: 0.567 degrees

Resolution: 620x908

File size: 297.5 KB

Locations: La Gueule du Loup (Malonne), Namur, Namur, Belgium; Le Terme, Peyzac-le-Moustier, Dordogne, France


Here is a mix of my first image of M81 & 82 (back in march) that looked like "something", but far from an achievement, I decided to add some subs this summer in south of France and last night at home.

Data :

> Old image : 5x 40", 23x 60", 12x 90", 3x 150" and 3x 165" @ ...different iso settings (old ways, I tell you! ) ;

> New sessions : Ha 4 x 840'' + Bb 8 x 300'' @ 3200 iso

The color treatment of the first version was awkward so I'm not quite happy with this mix ;

And for the new subs, at this time of the year, the target wouldn't rise much above 30°... I expect to add more "quality subs" later this autumn and get rid of the old one for brand new, more "pristine" rendition... on this page.


Sky plot

Sky plot


M81 & M82 reloaded : old and new subs...,