Arp 239 / NGC 5278-5279
| Designation(s) | Arp 239, NGC 5278, NGC 5279 |
| Object Type(s) | Galaxy |
| Relevant Catalog(s) | All (Chron), Arp, NGC |
| Arp Category | Galaxies with the appearance of fission |
| Obs. Lat/Long | 42° 17', 073° 57' |
| Date and Time Observed | 2025-08-27 22:54:00 |
| Instrument | EdgeHD 8" w/f7 reducer-1,422mm FL |
| Camera | Player One Apollo-M Mini |
| Image Details | Up is 92.6 degrees E of N. Transparency: Excellent. Seeing: Good. Total integration time was 32m 30s. Exposures 15s@300g, No Filter. Dithered and recentered in SharpCap. No guiding. |
| Description | Two, reasonbly bright NGC galaxies pretending they're M-51. There's an obvious connection from 5278, the larger galaxy, to 79 via a heavy arm. Less obvious connection between the two nucleii. This is yet another example of Arp's reluctance to see merging or "fusion" between two galaxies. What gives this the "appearance of fission" is a mystery to me. |
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