4 Ursae Majoris is the Bayer designation for a star in the northern circumpolar constellation of Ursa Major. The star is around 256 light years away from Earth. The Star has an estimated age of around four billion years. The star has a mass 1.2 times larger than the Sun, but has expanded to 18 times the Sun's girth. The star's effective temperature is 4415 K (7487 °F, 4141 °C).
In 2011, an extrasolar planet was found orbiting this star.
4 Ursae Majoris SystemEdit
- Mass: >7.1 ± 1.6 MJ
- Semimajor axis: 0.87 ± 0.04
- Orbital period (earth days): 269.3 ± 1.96
- Eccentricity: 0.432 ± 0.024