NGC/IC Project Restoration Effort
(This is a very very beta version)
NGC188
Basic Information
Location and Magnitude
Right Ascension: 0:47:30.0
Declination: +85:15:30
Constellation: CEP
Visual Magnitude: 8.1
Historic Information
Discoverer: Herschel J.
Year of discovery: 1831
Discovery aperture: 18.3
Observational
Summary description: Cl, vL, R, 150-200 st 10…18
Sub-type: II2r
Steve's Notes
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NGC 188
17.5" (12/26/00): At 100x, ~75 stars within 10'-12', roundish group. The cluster is fairly rich but unconcentrated with a noticeable void of stars near in the center and a somewhat ill-defined boundary. The stars appear to be layered with at least a dozen mag 12-13 stars superimposed on a much richer carpet of mag 14-15 stars over unresolved haze. At 220x, some additional very faint stars are visible bringing the total up to ~85. Two mag 9.5-10 field stars are just off the west edge and two mag 8.5-9 stars are beyond the eastern border. This is one of the older known open clusters with an age of ~6.3 billion years.
13" (8/24/84): about 50 stars at 62x with several mag 7-9 stars in field, appears fully resolved.
8": large cluster, many faint stars, not rich, blank areas near center.