M101: LRGB from the back yard (Glenn Diekmann)

Celestial hemisphere: Northern · Constellation: Ursa Major (UMa) · Contains: M 101 · NGC 5447 · NGC 5449 · NGC 5450 · NGC 5451 · NGC 5453 · NGC 5455 · NGC 5457 · NGC 5461 · NGC 5462 · NGC 5471 · PGC 2464645 · PGC 2468609 · PGC 2469762 · PGC 2816075 · PGC 49919 · Pinwheel galaxy

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M101: LRGB from the back yard

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M101: LRGB from the back yard

M 101, the graceful Pinwheel Galaxy in Ursa Major, is a difficult visual target from my suburban back yard. Although it is visual magnitude is a relatively bright +7.77, its large size gives it low surface brightness. I detected its pale nebulosity at my club's dark site with the 8-inch SCT I used to take this picture, but even then it was more challenging than I expected.

To truly appreciate the delicate structure of this target, one must image it! I have done so once before. This time, I wanted to get at least 20 hours on it, and I wanted to bring out as much fine detail as possible. The biggest challenge with processing my back yard images is dealing with the copious noise. I am reasonably happy with the result.

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The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

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Status	Advanced success
Started	...
Astrometry.net job	3518246
PixInsight job	1FD3RXRNO3CFYM3LXBLL81IM3L0EDND7
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	14h03m14s.378
RA (top/left)	14h05m20s.831
RA (top/right)	14h01m04s.349
RA (bottom/right)	14h01m09s.398
RA (bottom/left)	14h05m22s.875

Dec (center)	+54°24′07″.38
Dec (top/left)	+54°38′54″.84
Dec (top/right)	+54°38′15″.93
Dec (bottom/right)	+54°09′11″.36
Dec (bottom/left)	+54°09′51″.24

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M101: LRGB from the back yard

M101: LRGB from the back yard

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M101: LRGB from the back yard

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