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RA: 15h 01m 47.8s
Dec: −51° 55′ 7″
Ch: MSA:968, U2:431, SA:21
Ref: DAML02, NGC/IC
Type: open cluster, p
Mag: B=8, V=?
Discovered by Sir John Herschel at the Cape of Good Hope with an 18-inch f/13 speculum telescope. He recorded it as "a pL cluster VII class; coarse, not comp, chief double star taken."
The RNGC (Sulentic and Tifft 1973) notes that this is a nonexistent object. Their coded description reads NOCL) S.
1995-05-28: 11x80.Technopark. 20:15 SAST. Hazy sky, thin clouds. One of Herschel's Doubtfuls. I noticed this object earlier in the sweep before looking up its identity on the map. There are several stars in the binocular field which are of a similar magnitue. None of these exhibit a hazy envelope as does this star. I can imagine seeing a close companion to this star, contributing to the haze.
NGC 5800 (15h 02m 00s, -51 55.1)
Doubtful Objects Report 4.
Location: Campsite South 23 16 - East 29 26
Telescope: Meade 8" 26mm eyepiece
Four stars forming a near triangle shape with the brightest member to the north east in a busy starfield. I think the combination can be described as an asterism.
Alldays (22.50S, 20.12E, 770m).
12-inch f/10 SCT (95x, 218x)
Four stars forming a near triangle shape with the brightest member to the NE in a busy star field. I think the combination can be described as an asterism. The four stars is all about 9 Magnitude and rufly in a sling triangle shape. The western one is a double star with companion to south, and they are notable all yellow in colour. I estimate the group more or less 4' in size. Going to use this one with the small clusters and a sketch.
The Messier objects
The Bennett objects
The Caldwell list
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