M81 and M82 - Bode's Nebula and Cigar Galaxy (Tyrel Smith)

Celestial hemisphere: Northern · Constellation: Ursa Major (UMa) · Contains: Bode's Galaxy · Cigar Galaxy · ES UMa · M 81 · M 82 · NGC 3031 · NGC 3034 · PGC 2726822 · PGC 2728713 · PGC 2728721 · PGC 2730379 · PGC 2730409 · PGC 2730709 · PGC 2731294 · PGC 2732102 · PGC 2732338 · PGC 2732797 · PGC 2733060 · PGC 28225 · PGC 28505 · PGC 28529 · PGC 28757 · PGC 28848 · PGC 3086325 · PGC 3097961

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M81 and M82 - Bode's Nebula and Cigar Galaxy

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M81 and M82 - Bode's Nebula and Cigar Galaxy

This was my galaxy season tester. I wanted to see how well I'd be able to image with the 12.5" iDK from my red transition zone (sqm 19.0). The sky conditions make RGB imaging problematic from my back yard. The gradients are fairly trivial to deal with, but the total integration time needed from my skies for RGB is what interests me. I think for this image to meet my goals I would easily need 5x the integration. Given that this is a bright target, that does not bode well (pun intended) for smaller, more faint galaxies this season. Still, it won't stop me from trying! I only ended up with 12 or so hours of RGB data, and no luminance. I sold the camera halfway through the project, so had to stack up what I had. This was also during about 75% moon, so not too bad given the conditions and short integration.

Blending the Ha data gave me fits. I discovered if I blended it early in the linear phase that it was wrecking color calibration and balance. I ended up waiting until near the end and blending the NBRGBCombination in PI during the non-linear phase. This worked much better for me. I don't do a lot of HaRGB, so this was another good tester. I don't really count the Ha towards the total integration time, since only small bits of the Ha data were used to supplement the red channel.

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Status	Advanced success
Started	...
Astrometry.net job	4303028
PixInsight job	FSTPIU5UFJMI4VLPW6XDMEIG8GM20FD0
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	09h55m53s.113
RA (top/left)	09h48m06s.284
RA (top/right)	09h55m54s.753
RA (bottom/right)	10h03m40s.244
RA (bottom/left)	09h55m51s.442

Dec (center)	+69°20′28″.66
Dec (top/left)	+69°19′33″.42
Dec (top/right)	+68°39′16″.13
Dec (bottom/right)	+69°20′05″.66
Dec (bottom/left)	+70°01′40″.19

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M81 and M82 - Bode's Nebula and Cigar Galaxy

M81 and M82 - Bode's Nebula and Cigar Galaxy

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M81 and M82 - Bode's Nebula and Cigar Galaxy

M81 and M82 - Bode's Nebula and Cigar Galaxy

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