| Designation(s) | Arp 234, NGC 3738 |
| 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' |
| Constellation | Ursa Major |
| Date and Time Observed | 2025-01-03 22:37:00 |
| Instrument | EdgeHD 8" w/f7 reducer-1,422mm FL |
| Camera | Player One Apollo-M Mini |
| Image Details | Up is 277.2 degrees E of N. Total integration time was 50m. Exposures 15s@300g, UV/IR Cut Filter. Darks subtracted, no flats. Dithered and recentered in SharpCap. No guiding. |
| Description | Because of its irregularity, this is a very challenging object to interpret. "The appearance of fission" presumably refers to the two lobes at the top (west side) of the target, flanking a line that bisects the bright central disk until close to the center. There's a second line that runs nearly parallel close to the southern flank of the galaxy. But why interpret them as fission rather than fusion? The standard negative plate in the atlas provided little help, so I "developed" it Affinity Photo and provide it in the comparison image. Although there's much higher resolution from the 200" Hale Telescope than my EdgeHD, I don't see anything in Arp's image to reduce my confusion. |
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