| Type | Open Cluster |
|---|---|
| Magnitude | 4.8 |
| Size | 27' |
| Right Ascension | 6h 32' (2000) |
| Declination | 4° 55' N |
| Constellation | Monoceros |
| Description | Cl, beautiful, st sc |
| Classification | II 3 r n:b |
Andrew Cooper
Nov 2, 2008 Hale Pohaku, HI (map)
12x36 Canon Image Stabilized Binoculars @ 12x
Seeing: 7 Transparency: 7 Moon: 0%
Large bright cluster, over ½° across, coarse, fully resolved in the binoculars, visible to the unaided eye, a large and quite faint nebula surrounds the cluster (NGC2246, NGC2238 and NGC2237)
Andrew Cooper
Mar 17, 2004 Sycamore House, Tucson, AZ (map)
28cm f/10 SCT Nexstar 11
Large, bright, coarse, several dozen stars scattered across more than 20', ten bright stars anchor the cluster, no nebulosity visible in the city allowing one to appreciate the cluster
Rev. T.W. Webb
May 19, 1885 Hardwick, Herefordshire, England (map)
Beautiful; visible to the naked eye; including 12, 6mg. yellow; and many 7 and 9 mg. stars. The smallest, 14 mg., run in rays. Small pair near centre.― Celestial Objects for Common Telescopes, T. W. Webb, 1917
| 12 Monocerotis | Collinder 97 | NGC 2237 |
| NGC 2238 | NGC 2246 | NGC 2252 |
Drawings, descriptions, and CCD photos are copyright Andrew Cooper unless otherwise noted, no usage without permission.
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