Celestial hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  Bode's Galaxy  ·  M 81  ·  NGC 3031
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Messier 81 - Bode's Galaxy and the Galactic Cirrus (HaLRGB), 



    
        

            Frank Breslawski
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Messier 81 - Bode's Galaxy and the Galactic Cirrus (HaLRGB)

Getting plate-solving status, please wait...
Messier 81 - Bode's Galaxy and the Galactic Cirrus (HaLRGB), 



    
        

            Frank Breslawski
Powered byPixInsight

Messier 81 - Bode's Galaxy and the Galactic Cirrus (HaLRGB)

Acquisition details

Dates:
Feb. 27, 2022 ·  Feb. 28, 2022 ·  March 2, 2022
Frames:
Astronomik H-alpha CCD 6nm 50x50 mm: 36×600(6h) (gain: 100.00) -10°C bin 2×2
Astronomik L-2 Luminance UV/IR Block 50 mm: 220×180(11h) (gain: 0.00) -10°C bin 2×2
Astronomik Type 2c Blue 50 mm: 36×300(3h) (gain: 0.00) -10°C bin 2×2
Astronomik Type 2c Green 50 mm: 36×300(3h) (gain: 0.00) -10°C bin 2×2
Astronomik Type 2c Red 50 mm: 36×300(3h) (gain: 0.00) -10°C bin 2×2
Integration:
26h
Darks:
50
Flats:
20
Bias:
200
Avg. Moon age:
27.48 days
Avg. Moon phase:
6.60%
Bortle Dark-Sky Scale:
4.00

RA center: 09h55m28s.27

DEC center: +69°0341.1

Pixel scale: 1.240 arcsec/pixel

Orientation: -91.121 degrees

Field radius: 0.484 degrees

WCS transformation: thin plate spline

More info:Open 

Resolution: 2196x1758

File size: 6.4 MB

Locations: Home, Bergisches Land, Germany

Data source: Backyard

Description

In addition to Bode's Galaxy, I also wanted to show the strongly present galactic cirrus and how it's distributed around this great Messier object. 

A long integration time for the luminance exposures and a dark sky is of course key here. The cirrus also worked out quite well. During image processing and for the coloring I decided not to increase the color saturation too much and to emphasize the blue in the spiral arms only very slightly. Nevertheless, the dwarf galaxy Holmberg IX (UGC 5336) should not become too faint with its colors.

In sum, a certain balancing act for image processing, which I think succeeded quite well. The dust bands of the cirrus present themselves very harmoniously next to the foothills of M81. 

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