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.

TODO

Look at the following paper and confirm the distance is 0.2 AU. Other sources give a larger distance. See desigation HIP 50801. https://iopscience.iop.org/article/10.1088/0004-6256/145/3/81

binary star of

Tania Australis

citation

Wikipedia contributors. (2024, July 21). Mu Ursae Majoris. In Wikipedia, The Free Encyclopedia. Retrieved August 2, 2024, from https://en.wikipedia.org/w/index.php?title=Mu_Ursae_Majoris&oldid=1235876804

note

This is closer to the star than Mercury is to the Sun (the semi-major axis of Mercury is 0.387098 AU)

random

Beta Cancri (Wikipedia) Beta Cancri (β Cancri, abbreviated Beta Cnc, β Cnc), also named Tarf /ˈtɑːrf/, is the brightest star in the zodiacal constellation of Cancer. It has an apparent visual magnitude of +3.5 and an absolute magnitude of −1.2. Based on parallax measurements obtained during the Hipparcos mission, it is approximately 290 light-years distant from the Sun. An exoplanet, designated Beta Cancri b, is believed to be orbiting the star.

see also

Mercury (Wikipedia)

snippet of

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.

tags

snippet