| Name | Guitar Galaxy / Ambartsumian's Knot |
| Designation(s) | Arp 105, NGC 3561, Abell 1185 |
| Object Type(s) | Galaxy |
| Relevant Catalog(s) | All (Chron), Arp, NGC |
| Arp Category | Elliptical galaxies connected to spiral galaxies |
| Obs. Lat/Long | 42° 17', 073° 57' |
| Constellation | Ursa Major |
| Date and Time Observed | 2025-03-18 22:20:00 |
| Instrument | EdgeHD 8" f10-2,032mm FL |
| Camera | ASI2600MC-Pro |
| Image Details | Up is 89.9 degrees E of N. Transparency: Good. Seeing: Good. Total integration time was 60m 20s. Exposures 20s@150g, Bin 2. UV/IR Cut Filter. Dithered and recentered in SharpCap. . |
| Description | This is a fabulous pair of interacting galaxies. Ambartsumian's Knot is the little dot right at the top ot the comparison images that is though to be the remnant of the extensive tidal tail pulled out of one of the galaxies. First observation of the night using the new 2500mc in Bin2. |
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