M25 / IC 4725
| Designation(s) | M25, IC 4725 |
| Object Type(s) | Open Cluster |
| Relevant Catalog(s) | All (Chron), IC, Messier |
| Obs. Lat/Long | 42° 17', 073° 57' |
| Constellation | Sagittarius |
| Date and Time Observed | 2024-06-01 00:35:00 |
| Instrument | EdgeHD 8" f10-2,032mm FL |
| Camera | ASI294MC-Pro |
| Image Details | Up is 271.1 degrees E of N. Total integration time was 5m. Exposures 15s@305g, UV/IR Cut Filter. Darks subtracted, no flats. Dithered and recentered in SharpCap. No guiding. |
| Description | Continuing Mesisier's exploration in Sagittarius, on June 20, 1764 he recorded, "A cluster of small stars in the neighborhood of the two previous clusters [M23/M24]." Originally observed by de Chéseaux in 1745-46, and others including Bode (1777) and Herschel himself (1783) it [in error?] was omitted from Herschel's General Catalog, and therefore did not receive NGC listing. <--> This strikes me as a typical open cluster on top of an atypical star field that's part of the Milky Way. |
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