Type | Open Cluster |
---|---|
Magnitude | 6.9 |
Size | 13' |
Right Ascension | 23h 24' (2000) |
Declination | 61° 35' N |
Constellation | Cassiopeia |
Description | L, Ri, mCM, *9..13 |
Classification | I 2 r |
Andrew Cooper
Dec 1, 2021 Waikoloa, HI (map)
20cm f/6 Newtonian, Cave Astrola @ 76x
Seeing: 7 Transparency: 5 Moon: 0%
A rich open cluster seen against a rich galactic starfield, bright and obvious, fully resolved, the central concentration is about 10' in diameter, very rich with 10 to 12th magnitude stars, the 8th magnitude SAO 20606 is on the western margin, the cluster is 1° south of 4 Cas
Andrew Cooper
Oct 21, 2006 TIMPA, Avra Valley, AZ (map)
12x36 Canon Image Stabilized Binoculars
Bright and distinct despite being in a heavy galactic starfield, small, not resolved
Andrew Cooper
Aug 27, 2006 TIMPA, Avra Valley, AZ (map)
28cm f/10 SCT Gypsy
A bright well defined open cluster, rich, quite clumpy in appearance with a few notable voids, well over 10' in diameter and reasonably round, homogeneous with a fairly small magnitude variation
Andrew Cooper
Sep 30, 2005 Gila, New Mexico (map)
90mm F/12 APO Violet Haze
Rich! a circular patch with a much brighter 8.2 mag. star on one side, resolved but with a mist of unresolved stars surrounding, visible in 9x63 binoculars, a good binocular object
Andrew Cooper
Nov 14, 1998 Empire Mts., Pima Co., AZ (map)
20cm f/10 SCT
Rich star cluster, roughly circular and well resolved
Rev. T.W. Webb
May 19, 1885 Hardwick, Herefordshire, England (map)
Irregular with orange star, as is frequently the case.― Celestial Objects for Common Telescopes, T. W. Webb, 1917
Charles Messier
Jan 7, 1774
Cluster of very small stars, mingled with nebulosity, which can be seen only with an achromatic telescope. It was when he observed the Comet which appeared in this year that M. Messier saw this cluster, which was close to comet on the 7th of September 1774; it is below the star d Cassiopeiae: that star was used to determine both the cluster of stars & the comet.― Connaissance des Temps, 1781
Drawings, descriptions, and CCD photos are copyright Andrew Cooper unless otherwise noted, no usage without permission.
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