| Designation(s) | Arp 263, NGC 3239 |
| Object Type(s) | Galaxy |
| Relevant Catalog(s) | All (Chron), Arp, NGC |
| Arp Category | Galaxies with irregular clumps |
| Obs. Lat/Long | 42° 17', 073° 57' |
| Constellation | Leo |
| Date and Time Observed | 2025-04-18 00:12:00 |
| Instrument | EdgeHD 8" w/f7 reducer-1,422mm FL |
| Camera | Player One Apollo-M Mini |
| Image Details | Up is 87.4 degrees E of N. Transparency: Fair. Seeing: Fair. Total integration time was 27m 30s. Exposures 15s@300g, UV/IR Cut Filter. Darks subtracted. Dithered and recentered in SharpCap. No guiding. |
| Description | Arp categorizes this as a galaxy with irregular clumps, and notes, "Diffuse outer filaments, bright knots inside." It certainly has all of that. The modern consensus seems to be that this is a post-merger galaxy that hasn't yet fully assimilated its quarry. Started observing this after transit. As it descended, the lowering angle made it more susceptible to cloud cover. I eventually had to give us with less than 30m. |
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