NGC 2158

Open Cluster NGC 2158, in Gemini

RA:: 06 : 07.5
Dec:: +24 : 06
Distance from Sun:
Distance from Galactic Center:
Apparent Diameter:: 5. arc min
Brightness:: 8.6 mag
Radial Velocity:
Diameter:
Abs. Mag:

Discovered by William Herschel on November 16, 1784.

This wellknown open cluster, situated very close to famous M35 (NGC 2168), was considered as a globular by Rosino (1954), see also Sawyer Hogg (1959). Despite this, its nature as an old Galactic open cluster is established with certainty; its age has been estimated at about 1.05 billion years.

The image in this page has been obtained with the Burell-Schmidt Telescope of Kitt Peak National Observatory near Tucson, Arizona. It has been cropped from a larger image of NGC 2158 together with its more prominent neighbor M35.
Credit: NOAO/AURA/NSF

More information on this image (N.A. Sharp, NOAO)

NGC 2158 had been discovered by William Herschel and cataloged as H VI.17.

Jean-Claude Mermilliod's WEBDA cluster page for open cluster NGC 2158

References:

Rosino, 1954. Contr. Padova in Asagio No. 52.
Helen B. Sawyer Hogg, 1959. Star Clusters. In: S. Flügge (ed.), Handbuch der Physik [Encyclopedia of Physics], Vol. LIII (53): Astrophysik IV: Sternsysteme [Astrophysics IV: Stellar Systems], p. 129-207. [ADS: 1959HDP....53..129S]. Here: Appendix B, Catalogue of globular clusters, p. 204-206.

[MW Globulars] | [NGC] | [DSS] | [SIMBAD] | [ADS]

Hartmut Frommert [contact]
[SEDS]