Mu Ursae Majoris

From Wikipedia, the free encyclopedia

μ Ursae Majoris
Observation data
Epoch J2000.0
Constellation
(pronunciation)		 Ursa Major
Right ascension 10h 22m 19.7s
Declination +41° 29' 58"
Apparent magnitude (V) +3.06
Distance 249 ± 14 ly
(76 ± 4 pc)
Spectral type M0III
Other designations
Tania Australis, Alkafzah al Thaniyah,
34 Ursae Majoris, HR 4069,
HD 89758, BD+42 2115,
FK5 386, HIP 50801,
SAO 43310, GC 14232

Mu Ursae Majoris (μ UMa / μ Ursae Majoris) is a star in the constellation Ursa Major. It also has the traditional names Tania Australis, and Alkafzah Australis.

Mu Ursae Majoris is a M-type red giant with a mean apparent magnitude of +3.06. It is approximately 249 light years from Earth. It is classified as a Semiregular variable star and its brightness varies from magnitude +2.99 to +3.33.

Spectroscopically it has been determined that this is a double star with a companion a mere 1.5 AU from the primary with a rotation period of 230 days.

  This variable star–related article is a stub. You can help by expanding it.