| Name | Polarissima Cluster |
| Designation(s) | NGC 188, C1 |
| Object Type(s) | Open Cluster |
| Relevant Catalog(s) | All (Chron), Caldwell, NGC |
| Obs. Lat/Long | 42° 17', 073° 57' |
| Constellation | Cepheus |
| Date and Time Observed | 2023-11-01 06:19:00 |
| Instrument | 8" EdgeHD SCT |
| Camera | ASI294mc-Pro |
| Image Details | Up is 276.8 degrees E of N. Transparency: Good. Seeing: Fair. Total integration time was 11m 30s. Exposures 30s@305g, UV/IR Cut Filter. Darks subtracted, no flats. Dithered and recentered in SharpCap. No guiding.. |
| Description | Discovered by John Herschel in 1825, within 5° of the celestial pole. Because it's so far above the galactic plain, it is subject to reduced gravitational forces, allowing it to stay together as one of the oldest known open clusters, estimated at 6.8 billion years. I originally imaged it as part of Nov '23 CN EAA Challenge. |
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