Arp 264 / NGC 3104
| Designation(s) | Arp 264, NGC 3104 |
| 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 Minor |
| Date and Time Observed | 2026-03-09 21:21:00 |
| Instrument | EdgeHD 8" w/f7 reducer-1,422mm FL |
| Camera | Player One Apollo-M Mini |
| Image Details | Up is 270.2 degrees E of N. Transparency: Fair. Seeing: Poor. Total integration time was 50m. Exposures 20s@225g, No Filter. Dithered and recentered in SharpCap. No guiding. |
| Description | This is an irregular galaxy, listed as apparent visual magnitude of 13.2. This is another instance where the sensitivity of my CMOS camera trumps the 200" telescope imaging on spectrographic film in terms of sensitivity. The 200" gathers 625x as much light as my 8", but the film was so insensitive!. I had to give my image more space in the side by side comparison with Arp's. The stars align perfectly, but my sensor rendered the shadowy exterior so much more fully that the N and S ends of the galaxy would have been truncated if I'd followed Arp's cropping. In this instance, Arp's comment, "Faint diffuse outer material" was just wrong. The "outer material" was simply the body of the galaxy which was too dim for Emulsion D to render. |
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