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NGC 5299
NGC 5299, ESO 133-5, h 3537, GC 3654
Type: open cluster
Mag: B=?, V=9
Size: 30′
PA: ?
History and Accurate Positions for the NGC/IC Objects (Corwin 2004)
NGC 5299. There is a +30 arcmin error in the GC and NGC declination, but JH's original CGH observation is correct. Once we look in the right spot, we find a large (roughly 25 arcmin across) Milky Way star cloud that matches JH's description. I've adopted the identification.
Historical observations
John Herschel
Discovered by John Herschel at the Cape of Good Hope with an 18-inch f/13 speculum telescope. He recorded it as "Star cluster of Class VII; much more than fills field; a very large and rich milky way cluster, quite insulated on the preceding, north and following sides, and nearly so to the south; forming a kind of peninsular projection, but much richer than the main body of the milky way."
Published comments
Burnham's Celestial Handbook
Burnham calls this a bright Milky Way field in Centaurus, diameter 30' and notes that it is probably not a true cluster. It is regarded as an invalid object in the NGC 2000.0.
Sulentic & Tifft (1973)
The RNGC (Sulentic and Tifft 1973) notes that this is a nonexistent object. Their coded description reads NOCL) S.
Contemporary observations
Auke Slotegraaf
1982
Viewing with a two-inch refractor at 20x, it appears as a pleasing cluster, small, rich and irregular in shape. It is well concentrated, and the stars are on the verge of resolution; with averted vision, however, many stars sparkle out. The stars appear to be closely packed and regularly distributed.
1995 May 28
1995-05-28: 11x80.Technopark. 20:15 SAST. Hazy sky, thin clouds. I don't see anything in binoculars that resembles a 'bright milky way cloud'. The whole area of the field is nebulous, typical milky way background, but nothing insulated enough to be called a separate object.
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Favourite lists
Lacaille's catalogue
The Messier objects
Dunlop's catalogue
The Bennett objects
The Caldwell list
Named DSOs
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