M81 - M82 in RGB with HO addition (Uwe Deutermann)

Celestial hemisphere: Northern · Constellation: Ursa Major (UMa) · Contains: Bode's Galaxy · Cigar Galaxy · M 81 · M 82 · NGC 3031 · NGC 3034

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M81 - M82 in RGB with HO addition

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M81 - M82 in RGB with HO addition

Another test for the Williams Optics RGB capabilities. And another year to try the M81/M82 combo, I guess I will do it until I am really really satisfied with the result (see last year's image below). The RGB and OIII acquisition was done with the multi star guiding, which turned out to be very good. The median eccentricity of the image is according to PI 0.35 with a median FWHM of 3.9 pixels.

All in all I am not unhappy with the result, the RGB parts were very nice, which made it easier to process.

The integration of the Hα and OIII parts took me the longest, countless steps to get the best ratio of RGB and the narrow band images together. I believe it would fill a book if I would try to write down all the different steps.

Galaxy season is getting close, and the result will motivate me to not just focus on the nebula, which are still my favorite targets in the sky (2 new ones currently in the making 😊).

Old image:

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Status	Advanced success
Started	...
Astrometry.net job	4177535
PixInsight job	3G2W3MN7TEGOW5VPS4GZYMIZVIFD8VZ6
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	09h55m40s.578
RA (top/left)	09h51m32s.158
RA (top/right)	09h52m54s.496
RA (bottom/right)	09h59m38s.861
RA (bottom/left)	09h58m34s.764

Dec (center)	+69°19′53″.90
Dec (top/left)	+69°46′36″.89
Dec (top/right)	+68°48′48″.99
Dec (bottom/right)	+68°52′48″.10
Dec (bottom/left)	+69°50′46″.74

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M81 - M82 in RGB with HO addition

M81 - M82 in RGB with HO addition

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M81 - M82 in RGB with HO addition

M81 - M82 in RGB with HO addition

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