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Contains:  Bode's nebulae, M 81, NGC 3031
Getting plate-solving status, please wait...

Messier 81 Closeup

Technical card

Imaging telescope or lens:RCOS 14.5"

Imaging camera:SBIG STX 16803


Guiding telescopes or lenses:

Guiding cameras:

Focal reducers:

Software:Adobe Photoshop CCPixInsight for Mac

Filters:Astrodon luminance filterAstrodon RGB


Resolution: 7192x6592

Dates:Jan. 31, 2017

Astrodon luminance filter: 25x1200" -25C bin 1x1
Astrodon luminance filter: 47x900" -25C bin 1x1

Integration: 20.1 hours

Darks: 0

Flats: 0

Flat darks: 0

Bias: 0

Avg. Moon age: 3.51 days

Avg. Moon phase: 13.28%

Bortle Dark-Sky Scale: None

Mean SQM: None

Mean FWHM: None

Temperature: None

Basic astrometry details job: 1484099

RA center: 9h 55' 34"

DEC center: +69° 3' 50"

Pixel scale: 0.275 arcsec/pixel

Orientation: 133.514 degrees

Field radius: 0.373 degrees

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


This LRGB image contains a lot of information, hard to handle. As a test, trying to collect some comments. This is an in-process work. More data will be collected.

Version C is a drizzled version, but didn't see significant improvement in details.

Version D has a manual color adjustment of blue turned down by 5% based on non-structural color calibration (PixInsight jargon, meaning balance color channels based on an area of interest).



Miles Zhou
License: None (All rights reserved)



Description: Added Ha. Noise is not under well control. More revision may come.


Description: Drizzled


Description: Color adjustment

Sky plot

Sky plot


Messier 81 Closeup, 


            Miles Zhou

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Members of Deep Sky West