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RA: 00h 47m 30s
Dec: +85° 14′ 5″
Ch: MSA:6, U2:1, SA:1
Ref: SIMBAD, Collinder (1931), DAML02, Archinal&Hynes (2003), Skiff20080430-s
Type: open cluster, 12r
Mag: B=8.91, V=8.1
(Lick Obs Bulletin, Vol 14, No. 420) gives the diameter as 14' and the class as II 1 r.
A catalogue of star clusters shown on Franklin-Adams chart plates. Mem.R.A.S., 60(5), 175-186.
Phelps, R. L., Janes, K. A. & Montgomery, K. A. (1994) Development of the galactic disk: A search for the oldest open clusters. Astron.J., 107(3), 1079.
Included in Table 6: The oldest open clusters.
Notes that it is the nearest cluster to the north celestial pole, and is known to be very old, older even than the globular clusters as determined by elemental abundances and other spectral data.
by Jim Lucyk: Sky&Tel. 9/60 p141, Sky&Tel. 11/62 p261, Sky&Tel. 6/69 p394, Sky&Tel. 12/86 p563, Burnhams V1 p612, Vehrenberg's Atlas of DS Splendors (3ed).
(Sulentic and Tifft 1973) notes that this is a 9.5 mag open cluster.
Raab, S. (1922) A research on open clusters. Lund Medd. Astron. Obs. Ser. II, 28, 1.
Based of F-A plates: "This cl is not distinctly shown on the chart"
Lorenzin, in the electronic version of "1000+ The Amateur Astronomers' Field Guide to Deep Sky Observing", notes "8M; 15' diameter; very large, faint and rich with >100 12M and dimmer members; similar to N6791 in LYR"
8cm - lg, mod f patch amongst sev m8-10 fld *s. fairly smooth but hint of gran. sl concen. BS, 13Aug1983, Anderson Mesa.
25cm - 90x/180x. pretty f, distinguished by f 20' diam haze. 50 brtr *s on top of it. two br *s widely sep on each side. loose looking.
30cm - finally after all these years! hardly distinguishable from bkgrnd because of fld size. unconcen, scattered grping of 50 *s, m13+. no unres haze.
Observing site: Little Bennett Regional Park
[0h 44m 0s, 85° 20m 0s] This cluster does not stand out from the Milky way. It was found with the finder chart. The faint stars that make up most of it were unseen on this 4.8mv night.
The Messier objects
The Bennett objects
The Caldwell list
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