Arp 227 / NGC 470 / NGC 474
| Designation(s) | Arp 227, NGC 470, NGC 474 |
| Object Type(s) | Galaxy |
| Relevant Catalog(s) | All (Chron), Arp, NGC |
| Arp Category | Galaxies with concentric rings |
| Obs. Lat/Long | 42° 17', 073° 57' |
| Constellation | Pisces |
| Date and Time Observed | 2025-10-10 22:52:00 |
| Instrument | EdgeHD 8" w/f7 reducer-1,422mm FL |
| Camera | Player One Apollo-M Mini |
| Image Details | Up is 268.5 degrees E of N. Transparency: Fair. Seeing: Good. Total integration time was 32m30s. Exposures 15s@300g, No Filter. Dithered and recentered in SharpCap. No guiding. Lightly enhanced in affinity photo with Noise-X-Terminator and sharpening. |
| Description | This was a target for the October '25 CN EAA Challenge. NGC 474's faint but massive rings are quite a sight! Arp's recorded in his notes: " Pos. of spiral.SO is E and a little N.Very faint rings extend to diameter of 7'.4." If you look at my inverted capture (right) compared to Arp's left, it's another example where my 8" Celestron can achieve "deeper" imaging than the 200" Hale telescope in the 1960s! My image benefits from a CMOS sensor and sophisticated processing, whereas Arp was stuck with a film image. Still, the 200" gathers 625x as much light. It just shows the HUGE impact of digital imaging on our hobby! |
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