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Contains:  NGC 3077, M 82, NGC 3034, M 81, Bode's nebulae, NGC 3031
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M81 and M82

Technical card

Resolution: 3120x2992

Dates:Jan. 7, 2018Jan. 8, 2018Jan. 13, 2018Jan. 14, 2018Jan. 15, 2018Jan. 17, 2018Jan. 18, 2018Jan. 19, 2018Jan. 20, 2018March 22, 2018March 23, 2018March 24, 2018April 1, 2018April 2, 2018

Frames:
Astrodon 5nm H-Alpha filter: 24x1800" -20C bin 1x1
Astrodon Blue Tru-Balance E-series gen 2: 22x600" bin 1x1
Astrodon Green Tru-Balance E-series gen 2: 34x600" bin 1x1
Astrodon Luminance Tru-Balance E-series gen 2: 12x300" bin 1x1
Astrodon Luminance Tru-Balance E-series gen 2: 29x600" bin 1x1
Astrodon Red Tru-Balance E-series gen 2: 33x600" bin 1x1

Integration: 32.7 hours

Avg. Moon age: 13.00 days

Avg. Moon phase: 33.04%

Astrometry.net job: 2012617

RA center: 149.177 degrees

DEC center: 69.245 degrees

Pixel scale: 1.661 arcsec/pixel

Orientation: 270.483 degrees

Field radius: 0.997 degrees

Locations: Deep Sky West Remote Observatory, Rowe, New Mexico, United States

Description

The area is kinda nice, but so hard to process. I can't say that I am satisfied with this image, but I couldn't get better one. Didn't want to push up IFN too much because, honestly, I think this view would be much better without it.

Please take a few seconds to look at full resolution, this area is filled with scattered small treasures:

1. You can see that M81 is actually larger than it seems at a first glance - you can notice fery faint spiral arms on both sides, visible as small blue areas of star formation.

2. There is a faint hydrogen cloud to the right from M82, farther than all other bright hydrogen clouds. It's not an artefact of processing.

3. NGC 3077 on the very top shows some dust, plus it has few blue areas of intense star formation above it, outside all other visible glow of the galaxy itself. Not sure if they belong to the NGC 3077 though.

4. Lots and lots of galaxies and thier clusters in the background! There is huge and very nice cluster of galaxies below and to the right from M82.

5. Galaxy UGC 5336 (or Holmberg IX) just above M81 with its pretty large nice HII region!

6. Faint galaxy LEDA 28731 to the left of M81.

Hydrogen is from FSQ106, LRGB is from RH305

Comments

Author

nekitmm
Nikita Misiura
License: Attribution-NonCommercial Creative Commons
2865
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M81 and M82, 





    
        

            Nikita Misiura