M81 group of galaxies and interstellar flux nebula (tommy_nawratil)

Celestial hemisphere: Northern · Constellation: Ursa Major (UMa) · Contains: 22 UMa · 24 d UMa · 27 UMa · Bode's galaxy · Bode's nebulae · Cigar galaxy · M 81 · M 82 · NGC 2892 · NGC 2909 · NGC 2959 · NGC 2961 · NGC 2963 · NGC 2976 · NGC 2985 · NGC 3027 · NGC 3031 · NGC 3034 · NGC 3065 · NGC 3066 · NGC 3077 · The star 22UMa · The star 24UMa · The star 27UMa

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M81 group of galaxies and interstellar flux nebula

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M81 group of galaxies and interstellar flux nebula

This widefield was obtained at 5 nights first using a Canon 70-200L f/4 at 200mm, but the stars were not round even in the center. So I skipped those stars and did some more nights with the 180mm Sigma Macro at full f/2.8. From the countless 3min subs at Iso800 I selected 240 from the first and 180 from the second series, giving a total of 420subs for the background. Sounds complicated? It was.

To get hold of the IFN nebula near a bigger city is a difficult idea, I added the Idas D1 clip filter, but still needed extensive processing. I tried to keep a natural looking balance in brightnesses, and featuring the galaxies in most possible detail.

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Status	Advanced success
Started	...
Astrometry.net job	3283448
PixInsight job	Y8V47CISOTEUYA36WU2EF9QM03MIJR0E
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	09h56m08s.25
RA (top/left)	10h18m08s.45
RA (top/right)	10h29m39s.62
RA (bottom/right)	09h25m08s.52
RA (bottom/left)	09h32m02s.39

Dec (center)	+69°21′18″.10
Dec (top/left)	+65°34′45″.4
Dec (top/right)	+72°43′38″.3
Dec (bottom/right)	+72°53′24″.9
Dec (bottom/left)	+65°41′28″.4

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M81 group of galaxies and interstellar flux nebula

M81 group of galaxies and interstellar flux nebula

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M81 group of galaxies and interstellar flux nebula

M81 group of galaxies and interstellar flux nebula

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