| Designation(s) | Arp 1, NGC 2857, PC 2666 |
| Object Type(s) | Galaxy |
| Relevant Catalog(s) | All (Chron), Arp, NGC |
| Arp Category | Spiral galaxies of low surface brightness |
| Obs. Lat/Long | 42° 17', 073° 57' |
| Constellation | Ursa Major |
| Date and Time Observed | 2024-03-01 18:20:45 |
| Instrument | 8" EdgeHD SCT |
| Camera | ASI294mc-Pro |
| Image Details | Up is 270.4 degrees E of N. Total integration time was 53m. Exposures: 30s@305g, darks subtracted, UV/IR Cut Filter, dithered and recentered in SharpCap. Darks subtracted, no flats. Dithered and recentered in SharpCap. No guiding.. |
| Description | Captured in an observation with Arp 285 in the same frame. Arp 285 was substantially brighter, but Arp 1 emerged eventually. No moon. A faint spiral galaxy with extended arms. Lovely once you could see it clearly! Significantly, the slightly extended upper arm of Arp 1 points at the two Arp 285 galaxies (see full image in the gallery), suggesting it may have been caused by a gravitational interaction with them. |
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