Abell 2218
| Designation(s) | Abell 2218 |
| Object Type(s) | Galaxy |
| Relevant Catalog(s) | All (Chron) |
| Obs. Lat/Long | 42° 17', 073° 57' |
| Date and Time Observed | 2025-06-23 07:44:03 |
| Instrument | EdgeHD 8" w/f7 reducer-1,422mm FL |
| Camera | Player One Apollo-M Mini |
| Image Details | Up is 270.7 degrees E of N. Transparency: Fair. Seeing: Good. Total integration time was 19m 30s. Exposures 15s@300g, UV/IR Cut Filter. Dithered and recentered in SharpCap. No guiding. |
| Description | George O. Abell is best known for his catalog of 2,712 rich clusters of galaxies, in addition to his list of 89 planetary nebulae, developed from the Palomar Sky Survey while he was a graduate student at Calltech. George received his Ph.D. in 1957, which put him 8 years behind Chip Arp. This is a challenging object with a large number of dim galaxies captured on a mediocre night. To be clear, while it looks like a dense open star cluster, those grayish objects aren't individual stars, they're galaxies, each containing hundreds of billions of stars. SharpCap filtered roughly 40% of lights due to a high cloud layer moving in and out, and I was forced to stop observing when the low clouds completely blotted out the sky. |
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