NGC/IC Project Restoration Effort
(This is a very very beta version)
NGC6402
Basic Information
Location and Magnitude
Right Ascension: 17:37:36.1
Declination: -3:14:43
Constellation: OPH
Visual Magnitude: 7.6
Historic Information
Discoverer: Messier
Year of discovery: 1764
Discovery aperture: 3.5
Observational
Summary description: ! globular, B, vL, R, eRi, vgmbM, rrr, st 15
Sub-type: VIII
Steve's Notes
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NGC 6402
24" (7/30/16): at 432x; very bright, large, nearly fills the 10' field. The outer halo is resolved into dozens of star, perhaps 50 or 60 total. The relatively large core is plastered with tiny resolved stars; roughly 50 additional stars were resolved over a lively background, so overall at least a 100 total though difficult to count due to density and the bright background glow. The outer halo is slightly elongated E-W as well as the core, but the overall appearance is symmetrical. The core only exhibits a broad, weak concentration.
17.5" (7/1/00): this bright, large, fairly symmetric globular appears elongated ~E-W and ~7'x5' in size at 220x. The bright core is relatively large at 4', very lively and granular with a layer of very faint stars. At 280x, ~30 stars are resolved in the small halo and at the edge of the intense core. A rich, even sprinkling of faint stars cover the core. It was difficult to count the resolved stars as numerous dim stars pop out with averted vision over the bright background haze, but perhaps 60-70 stars in total were glimpsed.
17.5" (7/16/88): bright, large, 25-30 very faint stars are resolved mostly at the edges which have a ragged appearance.
13" (7/5/83): fairly large, broad concentration. About a dozen very faint stars are resolved across the disk. The outer halo fades out smoothly.