Arp 79 / PGC 50584
| Designation(s) | Arp 79, PGC 50584 |
| Object Type(s) | Galaxy |
| Relevant Catalog(s) | All (Chron), Arp |
| Arp Category | Spiral galaxies with large high surface brightness companions on arms |
| Obs. Lat/Long | 42° 17', 073° 57' |
| Constellation | Bootes |
| Date and Time Observed | 2026-04-30 23:21:00 |
| Instrument | EdgeHD 8" w/f7 reducer-1,422mm FL |
| Camera | Player One Apollo-M Mini |
| Image Details | Up is 270.5 degrees E of N. Transparency: Poor. Seeing: Fair. Total integration time was 60m. Exposures 20s@225g, No Filter. Dithered and recentered in SharpCap. No guiding. |
| Description | Captured under a full moon with intermittent high clouds. Frankly, I nearly shut this down. But I had little else to do (Bootes was among the clearest parts of the sky), so I kept it running, and after 40 minutes or so I started to resolve enough detail. This is a tiny, 13th magnitude target. By 60 minutes -- with some fairly heroic processing -- it doesn't look too bad. This really is an odd duck. Categorized by Arp as a spiral with high surface brightness companion, it seems a bit of a stretch. Near as I can make out it's barely resolvable in Arp's image. High surface brightness restricts the options somewhat. Mostly it looks like a normal barred spiral with a bump on the left side (marked in the gallery with an ellipse) which, presumably is the companion, Arp's remarks, "Small separation between two knots in arm." is quite ambiguous. |
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