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
Captain William Henry Smyth
Mar 3, 1836 No. 6 The Crescent, Bedford, England (map)
150mm f/17.6 refractor by Tully 1827
A tolerably compressed cluster, between the Unicorn's fore legs. This is a brilliant gathering of large and small stars, from the 7th to the 14th magnitude; the latter running in rays. It was first registered by Sir William Herschel in the summer of 1784, and is No. 392 of his son's Catalogue. Its place is differentiated from α Orionis; and it may be found nearly in mid-distance between Pollux and α Leporis, where it is crossed by a line led from Procyon to the west, and passed between Orion's belt and his right shoulder, about 2° below Bellatrix.― A Cycle of Celestial Objects Vol II, The Bedford Catalogue, William Henry Smyth, 1844
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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