Arp 76 / M90

Designation(s)Arp 76, M90, NGC 4569
Object Type(s)Galaxy
Relevant Catalog(s)All (Chron), Arp, Messier, NGC
Arp CategorySpiral galaxies with small high surface brightness companions on arms
Obs. Lat/Long42° 17', 073° 57'
ConstellationVirgo
Date and Time Observed2024-03-13 13:32:42
Instrument8" EdgeHD SCT
CameraASI294mc-Pro
Image DetailsUp is 272.6 degrees E of N. Total integration time was 36m. Exposures 30s@375g, UV/IR Cut Filter. Darks subtracted, no flats. Dithered and recentered in SharpCap. No guiding..
DescriptionFinal observation of a very successful evening, completed around 1 AM. As expected for a Messier object, it is very bright. SharpCap had difficulty plate-solving, giving a "too few stars error"... so I upped the gain to 375. Given the surface brightness, and dithering every two 30-second frames, noise stayed reasonbly under control, and I was pleased to see the structure become evident after only half an hour.
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