Contains: M 81, Bode's nebulae, NGC 3031
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M 81 (Multiwavelength composite image)

Technical card

Resolution: 3600x2430

Dates: July 6, 2005March 17, 2012

Frames:
46x3600"
64x300" -30C

Integration: 51.3 hours

Avg. Moon age: 27.09 days

Avg. Moon phase: 12.35%

Bortle Dark-Sky Scale: 2.00

Mean SQM: 21.50

Mean FWHM: 2.80

Astrometry.net job: 228360

RA center: 148.886 degrees

DEC center: 69.066 degrees

Pixel scale: 0.409 arcsec/pixel

Orientation: 179.959 degrees

Field radius: 0.247 degrees

Description

Exposure Times: X-ray: 46 hours; Optical 5.3 hours.

Color Code: X-ray (Purple); Optical (Cyan, Gold); Infrared (Red).

Credit: X-ray: NASA/CXC/SAO (Chandra Space Telescope); Optical: Detlef Hartmann (Earthbound Newtonian Telescope); Infrared: NASA/JPL-Caltech (Spitzer Space Telescope)

Comments

Author

DetlefHartmann
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M 81 (Multiwavelength composite image), DetlefHartmann