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RA: 20h 06m 48s
Dec: +38° 21′ 0″
Ch: MSA:1149, U2:119, SA:9
Ref: SIMBAD, DAML02, NGC/IC, Archinal&Hynes (2003)
Type: open cluster, 41mn
Mag: B=?, V=7.7
NGC 6874. WH found this on 15 Sept 1792, describing it as "A coarsly scattered cluster of large stars, of a right-angled triangular shape." This is exactly the configuration seen about 15 seconds preceding the NGC position, and is the cluster that I've taken as the NGC object. The tabulated position refers to the approximate center of the triangle.
JH's position, copied correctly into GC and NGC, refers to the 10th magnitude star at the apex of the triangle, east of the center.
Synonyms: H VIII-086
Discovered in 1792 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "a coarsely scattered cluster of large stars, of a right-angle triangular shape."
The SAC database comments: "HURST: 10in, rich group triangle outline 19* in 7' "
The RNGC (Sulentic and Tifft 1973) notes that this is a nonexistent object. Their coded description reads NOCL S.
The Messier objects
The Bennett objects
The Caldwell list
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