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C1

NGC 188

Proper NameNone
Caldwell NumberC1
NGC/IC NumberNGC 188
ConstellationCepheus
Right Ascension0h 48m 26s
Declination+85° 15' 18"
Distancec.5,400 light years
c.1,700 parsecs
MagnitudeApparent: +8.1
Absolute: -3.1
DiameterApparent: 17'
Actual: 28 light years
Number of Stars> 130
Optimum VisibilityOctober (Usually visible from northern latitudes)
NotesUnusually for an open cluster, C1 lies far outside the disc of the Galaxy, and being remote from the gravitational influence of other objects has allowed it to remain intact as a cluster for far longer than would normally be the case. C1 has survived as a group for nearly seven billion years, a remarkable age for a cluster of this kind.

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