Arp 27 / NGC 3631

Designation(s)Arp 27, NGC 3631
Object Type(s)Galaxy
Relevant Catalog(s)All (Chron), Arp, NGC
Arp CategorySpiral galaxies with one heavy arm
Obs. Lat/Long42° 17', 073° 57'
ConstellationUrsa Major
Date and Time Observed2024-04-22 00:57:00
InstrumentEdgeHD 8" f10-2,032mm FL
CameraASI294mc-Pro
Image DetailsUp is 94.0 degrees E of N. Total integration time was 26m. Exposures 30s@305g, UV/IR Cut Filter. 93% moon, intermittent clouds. Darks subtracted, no flats. Dithered and recentered in SharpCap. No guiding.
DescriptionThis was a very challenging observation due to a 93% moon and high clouds; it took over an hour to capture 26m of data due to SharpCap's brightness filtering. In the event, I was very pleased with the quality of the capture. This is a charming spiral galaxy, largely symmetrical, with the one lower arm extended. With its compact diameter and apparently dense disc, it resembles a miniature Fireworks Galaxy.
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