| Designation(s) | Arp 72, NGC 5996, NGC 5994 |
| Object Type(s) | Galaxy |
| Relevant Catalog(s) | All (Chron), Arp, NGC |
| Arp Category | Spiral galaxies with small high surface brightness companions on arms |
| Obs. Lat/Long | 42° 17', 073° 57' |
| Constellation | Serpens |
| Date and Time Observed | 2024-06-13 00:49:00 |
| Instrument | EdgeHD 8" f10-2,032mm FL |
| Camera | ASI294MC-Pro |
| Image Details | Up is 90.7 degrees E of N (East). Total integration time was 35m 30s. Exposures 30s@305g, UV/IR Cut Filter. Darks subtracted, no flats. Dithered and recentered in SharpCap. No guiding. |
| Description | This observation principally shows two galaxies exchanging mass via a long tidal tail: the larger, NGC 5996 connecting to NGC 5994. 5996 is a barred spiral galaxy, with its bar pointing to 5994. Arp's remarks record, "Faint material from arm to and around comp." 5994 is the only "bright" object this fits. Presumably the two galaxies passed by each other too quickly for 5996 to fully capture 5994. Instead, the interaction peeled off and elongated the eastern arm of 5996 and created the tidal exchange with 5994. The second image in the gallery is an inverted monochrome version of my capture. While not as detailed as Arp's own, it clearly confirms Arp's remarks. |
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