This is a spectroscopic binary star system with a companion a mere 0.2 AU from the primary, assuming a distance of 71 parsecs, with an orbital period of 230 days.- Tania Australis (stars.astro.illinois.edu)
TANIA AUSTRALIS (Mu Ursae Majoris). Our Ursa Major, the Greater Bear, contains remnants of ancient Arabic constellations, the best-known example the star Alkaid, which refers to the leader of the daughters of a funeral bier. Southwest of the Dipper’s bowl lie three obvious pairs of stars that represent the bear’s paws, but to the Arabs were the tracks of leaping gazelles. The middle pair is the “second leap,” from which comes the name “Tania” (for “second”).
- Mu Ursae Majoris (Wikipedia)
Mu Ursae Majoris (μ Ursae Majoris, abbreviated Mu UMa, μ UMa), formally named Tania Australis /ˈteɪniə ɔːˈstreɪlɪs/, is a binary star in the constellation of Ursa Major. An apparent visual magnitude of +3.06 places it among the brighter members of the constellation.