Arp 316 / NGC 3187 / NGC 3189 / NGC 3193
| Designation(s) | Arp 316, NGC 3187, NGC 3189, NGC 3193 |
| Object Type(s) | Galaxy, Galaxy Cluster |
| Relevant Catalog(s) | All (Chron), Arp, NGC |
| Arp Category | Groups of galaxies |
| Obs. Lat/Long | 42° 17', 073° 57' |
| Constellation | Leo |
| Date and Time Observed | 2026-03-04 21:30:00 |
| Instrument | EdgeHD 8" w/f7 reducer-1,422mm FL |
| Camera | Player One Apollo-M Mini |
| Image Details | Up is 89.0 degrees E of N. Transparency: Good. Seeing: Fair. Total integration time was 40m. Exposures 20s@225g, No Filter. Dithered and recentered in SharpCap. No guiding. |
| Description | This is a small cluster which Arp presumably included because he believed, "Edge-on spiral [NGC 3189] shows signs of interaction" - presumably referring to the lower arm curving towards the elliptical galaxy NGC 3193. This is one of the few images in the Atlas not taken with the 200" Hale Telescope. Instead it's one that Arp took using the 48" Schmidt. Remarkably, it delivers roughly the same FOV as my imaging setup: since my framing wasn't identical to Arp's, it turned out the corners of my image didn't quite cover Arp's, which i had to fill in (luckily blank in Arp's image as well). Today, the Vera Rubin telescope is frequently showing structures connecting neighboring galaxies which were historically thought separate, "connected" only by gravity. Arp was a pioneer in focusing on the faint signs of interaction visible though 1960s telescopes. Taken with a 95% illuminated moon on a reasonably transparent night. |
| Catalog Links | <Previous | Arp Listings | Next> |
