Ruprecht 106

RA:

12:38:40.2

Dec:

-51:09:01

Distance from Sun:

69.1 kly

Distance from Galactic Center:

60.3 kly

Apparent Diameter:

5: arc min

Brightness:

10.90 mag vis

Radial Velocity:

-44.0 +/- 3.0 km/s

Diameter:

ly

Abs. Mag:

-6.35 Mag vis

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 et.al., 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 et.al. (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.

• Catalog of Variable Stars in Ruprecht 106 (Christine Clement)

• G. Alter, H.S. Hogg, J. Ruprecht and V. Vanysek, 1961. Bull. Astron. Inst. Czech., Vol. 12, p. 1, Appendix.
• R. Buonanno, G. Buscema, F. Fusi Pecci, H.B. Richer and G.G. Fahlman, 1990. Ruprecht 106 - A young metal-poor Galactic globular cluster. Astronomical Journal, Vol. 100, pp. 1811-1840 (Dec 1990) [ADS: 1990AJ....100.1811B]
• J. Ruprecht, 1966. Classification of open star clusters. Bulletin of the Astronomical Institute of Czechoslovakia, Vol. 17, pp. 33-44 [ADS: 1966BAICz..17...33R]
• R.F. Webbink, 1985. Structure parameters of galactic globular clusters. In: Dynamics of star clusters; Proceedings of the Symposium, Princeton, NJ, May 29-June 1, 1984. Dordrecht, D. Reidel Publishing Co., pp. 541-577 [ADS: 1985IAUS..113..541W"]