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Hemisphere:  Northern  ·  Contains:  Bode's nebulae  ·  M 81  ·  M 82  ·  NGC 3031  ·  NGC 3034
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M81 and M82, 


M81 and M82
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M81 and M82

Technical card

Imaging telescopes or lenses: Takahashi FSQ 106ED

Imaging cameras: SBIG ST-10XME

Mounts: Astro-Physics 900 GTO

Filters: Luminance  ·  Ha 5nm  ·  Astrodon I-series

Dates:March 23, 2019March 26, 2019March 28, 2019

Astrodon I-series: 54x420" bin 2x2
Ha 5nm: 34x900" bin 1x1
Luminance: 132x600" bin 1x1

Integration: 36.8 hours

Avg. Moon age: 20.16 days

Avg. Moon phase: 68.50%

Basic astrometry details job: 2646299

RA center: 9h 55' 40"

DEC center: +69° 21' 28"

Pixel scale: 2.646 arcsec/pixel

Orientation: 93.690 degrees

Field radius: 0.907 degrees

Resolution: 2040x1390

Data source: Backyard


The galaxies M81 and M82 are located about 12 million light-years away in the constellation Ursa Major. Both galaxies have active star forming regions that emit hydrogen-alpha (Ha) radiation.

Two things I learned while processing this image are that my backyard:
1) is dark enough to pick up the foreground integrated flux nebulae (IFN) from our galaxy and
2) is not dark enough to give a good signal in IFN even with 22 hours of luminance data.

While processing I initially enhanced the IFN, then decided that it gave me a headache so I subdued it, and then in the end decided to bring it back out again since I don't get to see it in my images very often.

Thank you for looking and hope you enjoy!



License: None (All rights reserved)

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M81 and M82,