Hemisphere:  Northern  ·  Contains:  Bode's nebulae  ·  M 81  ·  NGC 3031
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Messier 81 (Bode's Nebula) in Ursa Major, 



    
        

            Steve Milne
Messier 81 (Bode's Nebula) in Ursa Major
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Messier 81 (Bode's Nebula) in Ursa Major

Technical card

Imaging telescopes or lenses: TEC-140

Imaging cameras: QSI 690 WSG-8

Mounts: 10 Micron GM2000 HPS II UP

Guiding cameras: Starlight Xpress Lodestar X2

Software: Sequence Generator Pro  ·  Adobe Photoshop 6 CS  ·  Pixinsight 1.8

Filters: Ha 3nm  ·  Astrodon Tru-Balance LRGB E-Series Gen 2 Blue  ·  Astrodon Tru-Balance LRGB E-Series Gen 2 Green  ·  Astrodon Tru-Balance LRGB E-Series Gen 2 Red  ·  Astrodon Tru-Balance LRGB E-Series Gen 2 Luminance


Dates:Feb. 13, 2019

Frames:
Astrodon Tru-Balance LRGB E-Series Gen 2 Blue: 24x600" bin 1x1
Astrodon Tru-Balance LRGB E-Series Gen 2 Green: 24x600" bin 1x1
Ha 3nm: 24x1200" bin 1x1
Astrodon Tru-Balance LRGB E-Series Gen 2 Luminance: 48x600" bin 1x1
Astrodon Tru-Balance LRGB E-Series Gen 2 Red: 24x600" bin 1x1

Integration: 28.0 hours

Avg. Moon age: 7.95 days

Avg. Moon phase: 56.01%


Basic astrometry details

Astrometry.net job: 2550569

RA center: 9h 55' 45"

DEC center: +69° 3' 18"

Pixel scale: 0.744 arcsec/pixel

Orientation: 89.802 degrees

Field radius: 0.441 degrees


Resolution: 3340x2649

Locations: E-EyE, Fregenal de la Sierra, Extremadura, Spain

Data source: Unknown

Description

Messier 81 (Bode’s Galaxy, NGC 3031) is approximately 12 million light years away in the constellation of Ursa Major. It was first observed by Johann Elert Bode in 1774, and observed by Charles Messier on 9 February 1781 (from O’Meara, ‘Messier Objects 2nd Edition; 2014). The relatively young (200 million light year) dwarf, irregular galaxy, Holmberg IX) can also be seen.

Data for this object were collected between 14 January and 13 February 2019 from a remote imaging rig in Spain that is owned and operated by Barry Wilson and me.

Capture details are as follows:

Telescope: TEC 140
Camera: QSI 690
Filters: Astrodon
Mount: 10 Micron GM2000HPS

Ha: 24 x 1200s
Lum: 48 x 600s
Red: 24 x 600s
Green: 24 x 600s
Blue: 24 x 600s

A total of 28 hours exposure.

Data Capture: Steve Milne & Barry Wilson
Image Processing: Steve Milne

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gnomus
Steve Milne
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Messier 81 (Bode's Nebula) in Ursa Major, 



    
        

            Steve Milne