Arp 294 / NGC 3786 / NGC 3788
| Designation(s) | Arp 294, NGC 3786, NGC 3788 |
| Object Type(s) | Galaxy |
| Relevant Catalog(s) | All (Chron), Arp, NGC |
| Arp Category | Double or multiple galaxies with long filaments |
| Obs. Lat/Long | 42° 17', 073° 57' |
| Constellation | Ursa Major |
| Date and Time Observed | 2026-02-27 23:58:00 |
| Instrument | EdgeHD 8" w/f7 reducer-1,422mm FL |
| Camera | Player One Apollo-M Mini |
| Image Details | Up is 89.8 degrees E of N. Transparency: Fair. Seeing: Fair. Total integration time was 1hr 17m. Exposures 20s@225g, No Filter. Dithered and recentered in SharpCap. No guiding. |
| Description | Arp's remarks say, with typical economy, "Peculiar filaments". That presumably refers to the stellar stream heading NNW (left) from NGC 3788. Subsequent to my capture, I've found long exposure astrophotographs showing a circular stellar stream looping behind the south side of NGC 3786. That's barely hinted at in Arp's image, and mine. . This was a tough night at the office, with a 75% moon in addition to only fair transparency and seeing. This reduced contrast and made it tough to capture such a faint detail. Usually during a capture I can see the filament in real time and can easily enhance it in post processing. Here, despite 1hr 17m of integration, I really couldn't see it until I processed the inverted image. |
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