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RA: 19h 30m 36s
Dec: +20° 16′ 0″
Ch: MSA:1220, U2:162, SA:8
Ref: SIMBAD, DAML02, Archinal&Hynes (2003)
Type: open cluster, 11m
Mag: B=10.07, V=8.8
A small telescopic cluster lying on the east end of Collinder 399, the Coathanger.
Synonyms: H VI-014
Discovered in 1785 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "a cluster of extremely small and very compressed stars, a parallelogram of 4' long, 2' broad."
Trumpler (Lick Obs Bul, Vol 14, No. 420) gives the diameter as 5' and the class as 3 1 mE.
Photo Index by Jim Lucyk: Sky&Tel. 9/86 p317.
The RNGC (Sulentic and Tifft 1973) notes that this is a 12.0 mag open cluster.
Houston calls it a faint open cluster, about 3' in diameter; "I've have a good view of it with my 4-inch Clark refractor when the sky was clear and dark." He wrote: "Even small telescopes reveal the cluster as a 5' patch, elongated north-south, inside a quadrilateral of 9th to 11th magnitude stars. A fairly large instrument will resolve the cluster into members of magnitude 13 and fainter.
Observer: Dave Mitsky (e-mail: email@example.com)
Instrument: 12.5-inch equatorial reflector Location: Harrisburg, Pa, U.S.A.
Light pollution: moderate Transparency: poor Seeing: good
Time: Tue Jul 8 06:20:00 1997 UT Obs. no.: 207
Despite the less than ideal conditions on Tuesday morning (very hazy and light polluted skies) I was able to observe NGC 6802, one of my favorite dim star clusters. This small (3.5') Herschel 400 open cluster lies about 1 degree northeast of the Coathanger (Collinder 399). Using a 16mm Brandon Erfle (129x) and a 12.5" Cave Newtonian I was barely able to see NGC 6802 as an eleventh magnitude powder-like spray of stars. While in the area I also took a look at NGC 6800 and Stock 1, two nearby open clusters. NGC 6800 is a moderate sized group of over 30 stars and Stock 1 is a large cluster with many bright members.
15cm - 60x: lies inside a triangle (two are pairs). a few *s res.
- partially res in to ~20 *s of m13.5+ @ 140x. rectangular oval outline 4'x2'.5 in pa10 (seems sl off from N-S). a few brtr *s N side, much graniness and some haze. BS, 22May1988, Anderson Mesa.
- consp fine-grained fuzz @ 50x, partially res @ 80x. 195x shows bar in pa15 about half height of lg trapezoid of br *s that contains it, bar elong in 3:1 ratio. brtst *s m13.5 nr N end and one on E edge of bar. many more nr threshold, about tow doz w/o much fudging. BS, 5Sep1989, Anderson Mesa.
25cm - fairly f, elong N-S. a small triangle on N end and a wide pair to NW. about seven *s res plus gran.
30cm - 15 *s @ 238x w/f bkgrnd haze. small trapezium of m13 *s in N section. 3'x2'. 5' NW & NW are pairs.
Alldays (22.50S, 20.12E, 770m).
12-inch f/10 SCT (76x, 218x)
For the first time in my astronomy life I have the feeling of approaching a distant little town with flickering lights envelope in mistiness (12" – 76x). This very elongated cluster in a north to south direction shines soft with close flickering lights upon one another in the distant dark of night. The similar streetlights topped with a soft glow of light pollution, draped against the background of a distant dark mountain. This dainty cluster is situated at the east end of the "Coat hanger Cluster".
The Messier objects
The Bennett objects
The Caldwell list
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