Mu Ursae Majoris

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**μ Ursae Majoris**
Observation data Epoch J2000.0
Constellation	Ursa Major
Right ascension	10^h 22^m 19.7^s
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.