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



    
        

            Tom Harrison
M81
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M81, 



    
        

            Tom Harrison
M81
Powered byPixInsight

Equipment

Imaging Telescopes Or Lenses
RCOS 12.5" Truss
Imaging Cameras
SBIG STL6303e
Mounts
Paramount ME
Filters
Astrodon Tru-Balance Generation 2
Accessories
PIR · Off-Axis Guider Homeyer
Software
Maxim DL
Guiding Telescopes Or Lenses
RCOS 12.5" Truss
Guiding Cameras
SBIG STL6303e

Acquisition details

Dates:
Jan. 15, 2009
Frames:
114x600" (19h)
Integration:
19h
Avg. Moon age:
19.57 days
Avg. Moon phase:
76.04%

Basic astrometry details

Astrometry.net job: 99565

RA center: 09h55m33s.8

DEC center: +69°0404

Pixel scale: 0.702 arcsec/pixel

Orientation: -132.459 degrees

Field radius: 0.295 degrees

Resolution: 2500x1708

Data source: Own remote observatory

Remote source: Non-commercial independent facility

Description

M81, also known as Bode's Nebula or NGC 3031, is a classic grand design spiral galaxy, located in Ursa Major approximately 12 million light-years distant, and is the largest member of the M81 Group of Galaxies, another well known member being M82, the active galaxy which is gravitationally bound with M81 and NGC 3077, another member of the group.

Date: January 2009

Constellation: Ursa Major

Distance: 12 Million Light-Years

Place: Fort Davis, TX

Exposure Details: LRGB:600:180:180:180 unbinned

Processing: MaxIm DL, CCDStack, CCDSharp, RegiStar, Photoshop CS3

Optics: 12.5" RCOS Truss

Focal Length: 2802mm @ f9

Mount: Paramount ME

Camera: STL6303E

Focuser: RCOS

Guiding: Off-Axis with SBIG Guide Camera

Filters: LRGB Tru-Balance G

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M81, 



    
        

            Tom Harrison