WX Ursae Majoris Gliese 412

Stellar classification



  • X -1
  • Y 14
  • Z -7
→ Sol: 16

Object type

  • Flare Star
  • Star
  • Double or multiple star
  • Infra-Red source
  • High proper-motion Star
  • Variable Star
  • X-ray source
simbad:BD+44 2051B


Gliese 412 is a pair of stars that share a common proper motion through space and are thought to form a binary star system. The pair have an angular separation of 31.4″ at a position angle of 126.1°. They are located 15.8 light years distant from the Sun in the constellation Ursa Major. Both components are relatively dim red dwarf stars.

The two stellar components of this system have a projected separation of about 152 AU, and an estimated orbital semimajor axis of 190 AU. The primary has about 48% of the Sun's mass, while the secondary is only 10%. The primary has a projected rotation velocity at the equator of less than 3 km/s; the secondary has a rotation velocity of 7.7±1.7 km/s.

The primary star was monitored for radial velocity (RV) variations caused by a Jupiter-mass companion in a short period orbit. It displayed no significant excess of RV variation that could be attributed to a planet. A search of the system using near-infrared speckle interferometry also failed to detect a companion orbiting at distances of 1–10 AU. Nor has a brown dwarf been detected orbiting within this system.

The space velocity components of this system are U = 141, V = –7 and W = 7. They are members of the halo population of the Milky Way galaxy.

This article uses material from the Wikipedia article "Gliese 412", which is released under the Creative Commons Attribution-Share-Alike License 3.0.