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RA: 19h 20m 53s
Dec: +37° 46′ 18″
Ch: MSA:1151, U2:118, SA:8
Ref: SIMBAD, DAML02, Archinal&Hynes (2003)
Type: open cluster, 12r
Mag: B=10.52, V=9.5
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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.
(Sulentic and Tifft 1973) notes that this is a open cluster.
by Jim Lucyk: Sky&Tel. 3/71 p142, Astronomy mag. 7/85 p78, Burnhams V2 p1177.
Situated in Lyra, Houston calls this is a "sparse cluster, quarter degree in diameter, that is very difficult to distinguish from its rich milky way background. When I first hunted for it a few months ago, I decided it didn't exist. A later night and lower power finally produced this frail grouping of baout 2 dozen members."
Tom Lorenzin, in the e-version of "1000+ The Amateur Astronomers' Field Guide to Deep Sky Observing", notes: "11M; 20' diameter; large, faint and rich; a glorious sprinkle of over three-hundred 13M stars; <1 degree ESE of 4.5M Theta LYR."
Alldays (22.50S, 20.12E, 770m).
12-inch f/10 SCT (76x, 218x)
Soft large patch of light 76x, with a multitude of faint stars imbedded of it. Round shape, faint stars mingle well with nebulosity and a busy faint star field of view. Let M57 & 56 stand over in the article.
The Messier objects
The Bennett objects
The Caldwell list
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