| Designation(s) | Arp 73, IC 1222 |
| Object Type(s) | Galaxy |
| Relevant Catalog(s) | All (Chron), Arp, IC |
| Arp Category | Spiral galaxies with small high surface brightness companions on arms |
| Obs. Lat/Long | 42° 17', 073° 57' |
| Constellation | Hercules |
| Date and Time Observed | 2024-10-28 21:40:00 |
| Instrument | EdgeHD 8" w/f7 reducer-1,422mm FL |
| Camera | Player One Apollo Mini |
| Image Details | Up is 98.5 degrees E of N. Total integration time was 15m 45s. Exposures 15s@300g, UV/IR Cut Filter. Darks subtracted, no flats. Dithered and recentered in SharpCap. No guiding. |
| Description | This is an attractive barred spiral galaxy, probably SBb following the Hubble classification scheme. But there's more going on here. Categorized by Arp as a galaxy with high surface brightness companions, it shows several close to the edge of the main spiral envelope: presumably the two bright objects in the upper left, the one in the lower right, and then lower left. All distort the star envelope of the main galaxy which makes it definitive that these are companion galaxies. A fifth companion may be the bright spot on the upper right edge, though it may be a star. as the impact on the envelope is unclear. The companions certainly appear to be dwarf galaxies in the middle-stages of being absorbed.... similar to M32's relationship to M31. |
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