NGC 3938 (LRGB + H version) (rhedden)

Celestial hemisphere: Northern · Constellation: Ursa Major (UMa) · Contains: NGC 3938

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NGC 3938 (LRGB + H version)

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NGC 3938 (LRGB + H version)

NGC 3938 is an 11th magnitude SA(s)c spiral galaxy in Ursa Major, measuring 5.4' x 4.9'. Discovered in 1785, it is on the original Herschel 400 list. Distance estimates range from 43 million to 58 million light years. (Source: Rick Johnson, Mantrapskies.com).

This image is an LRGB + H-alpha composite taken from my Bortle 4/5 backyard, with RGB data from 2020/21, H-alpha from 2021, and Luminance data from 2021. 6 additional hours of luminance and 3.6 hours of H-alpha were added to the data I possessed last month when I posted the previous LRGB version.

This image is a milestone for me, as it is my first 24 hour+ integration project.

Total integration: 24.4 hours

Astrodon E-series LRGB filters; Orion extra Narrowband 7 nm H-alpha filter

Luminance: (2021): binned 2x2, 160s each, 255 subs, 11.3 hours total

RGB subs (2021): binned 3x3, 80s each, 42 x Red, 43 x Green, 46 x Blue, 2.9 hours total

RGB subs (2020): binned 1x1, 1080s each, 6 x Blue, 7 x Green, 9 x red, 6.6 hours total

H-alpha (2021): binned 3x3, 80s each, 43 subs, 3.6 hours total

Original
Final
B

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Status	Basic success
Started	...
Astrometry.net job	5031575
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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NGC 3938 (LRGB + H version)

NGC 3938 (LRGB + H version)

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NGC 3938 (LRGB + H version)

NGC 3938 (LRGB + H version)

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