Ruprecht 106

Globular Cluster Rup 106, in Centaurus

Distance from Sun:
69.1 kly
Distance from Galactic Center:
60.3 kly
Apparent Diameter:
5: arc min
10.90 mag vis
Radial Velocity:
-44.0 +/- 3.0 km/s
Abs. Mag:
-6.35 Mag vis
Discovered by J. Ruprecht in 1961.

Ruprecht 106 (or Ru 106, Rup 106) was discovered on photographic plates taken at the Boyden Observatory, South Africa, and first cataloged as open clusters (Alter, 1961). Ruprecht (1966) describes it as open cluster of very faint stars and Trumpler class III2m. Webbink (1985) includes it as possible globular cluster but takes it as doubtful. From their CCD photometric survey, Buonanno (1990) find a globular cluster type color-magnitude diagram, and that Ruprecht 106 is a "metal-poor" globular, i.e. has low abundance of elements heavier than Helium, and is perhaps 4-5 billion years younger than other globulars.


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Hartmut Frommert [contact]