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RA: 18h 17m 30s
Dec: −16° 39′ 0″
Ch: MSA:1368, U2:294, SA:15
Ref: SIMBAD, DAML02, Archinal&Hynes (2003)
Type: open cluster, 22mn
Mag: B=?, V=?
Synonyms: H VIII-055
Discovered in 1786 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "a coarsely scattered cluster of large stars."
The RNGC (Sulentic and Tifft 1973) notes that this is a open cluster.
1995-05-30: 11x80.Technopark. 23:00 SAST. Hazy sky. A large hazy milky way patch. Borders are very unclear.
1997 April 21. Jonkershoek. 11x80 tripod-mounted. No moon. Very difficult. Chart shows small cluster, I see a much larger patch.
1997 July 7, Monday, 21:00 - 24:00 Jonkershoek. 11x80's tripod-mounted. Very rich field, coarse grouping of many small stars, all of which are imagined. Shows as a round, mottled glow. Same size as M18.
Location: Jonkershoek Nature Reserve, Assegaaibosch Station
Date: 1998 July 31 / August 01, 01:00-02:40 SAST
11x80 tripod-mounted binoculars (9.5 mag stars at times not easy)
Sky conditions: Mediocre (transp. low, seeing average, dew) The skies are showing the effects of the combination of pollution (mainly from a nearby wood-processing plant) and a stable inversion layer, turning daytime skies grey-blue, and night skies ashen.
Between the Swan and M24 I picked up this wee one with not much certainty, only vaguely noticed as a hazy patch.
The Messier objects
The Bennett objects
The Caldwell list
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