10 Ursae Majoris

Object type

  • Spectroscopic binary
  • Star
  • Double or multiple star
  • Infra-Red source
  • High proper-motion Star
  • UV-emission source
  • X-ray source
simbad:* 10 UMa


10 Ursae Majoris (10 UMa) is a star in the constellation Lynx. Its apparent magnitude is 3.960. It is also fairly close, at 52.4 light-years (16.1 parsecs) away from Earth.

It is the third-brightest star in Lynx. Originally in the neighbouring constellation Ursa Major, it became part of Lynx with the official laying down of the constellation borders.

10 Ursae Majoris is a spectroscopic binary—orbital motion from the two stars can be detected by Doppler shifts in their spectra. In this case, the two stars can also be split by differential astrometry. The primary has a mass of 1,44 M and the secondary, 0.89 M. The primary is an F-type main-sequence star, and the secondary is K-type. The two orbit each other every 21.057 a along a slightly eccentric orbit.

This article uses material from the Wikipedia article "10 Ursae Majoris", which is released under the Creative Commons Attribution-Share-Alike License 3.0.