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RA: 18h 42m 12s
Dec: −06° 17′ 0″
Ch: MSA:1318, U2:295, SA:16
Ref: SIMBAD, DAML02, Archinal&Hynes (2003)
Type: open cluster, 21pn
Mag: B=9.93, V=9.4
Burnham calls it a "rich Milky Way field 15' diam in Scutum Cloud; probably not a true cluster."
The RNGC (Sulentic and Tifft 1973) notes that this is a 9.5 mag open cluster.
Houston notes that this cluster "lies on a rich blanket of background stars and is better seen at high magnifications."
Steve Coe, observing with a 17.5" f/4.5 at 100X, notes: "Seen in 10 x 50 binoculars as a bright edge to the Scutum Star Cloud. Not much in telescope, does not detach itself well from the star cloud.
Lick: grps N @ 40' and 50', S @ 24'.
15cm - abs hole on E edge of Great Rift. scanning along ~N-S border more
interesting than either N6683 or -84. -83 is sm. BS, 22Jun1990, Anderson
25cm - nice, elong NE-SW, about 4'x2'.5 w/20 *s in rich fld. 125x shows that cl
*s fntr than m11. about 10' W is edge of Great Rift, sharply defined,
making striking contrast @ 60x/95x, where rich & blank flds bisect view.
40' & 50' are two elong concens of fld *s at edge of Rift. each is hazy,
well concen @ 50x, and reveal lg numbers of f *s @ 190x. also 20' S is lg
assemblage of *s sl brtr than bkgrnd *s, forming 20' diam vcirc cl. BS,
15Mar1981, Anderson Mesa.
To call this an open cluster is somewhat optimistic: a 15.5-inch reflector shows it as a small, discrete collection of stars with a polygon of 4 stars in the centre. The general impression is that the cluster consists of roughly 20 stars arranged in an irregular boomerang shape. Of greater interest is the dark nebula Barnard 103, which lies to the immediate west of this grouping.
1997 July 8, Tuesday, 20:55 - 23:30 Jonkershoek. 11x80's tripod-mounted. At this position, I see a sudden, rich milky way field, 20' across. Nothing as small as shown on the map.
The Messier objects
The Bennett objects
The Caldwell list
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