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Lambda Ursae Majoris: Wikis


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λ Ursae Majoris
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Ursa Major
Right ascension 10h 17m 05.8s
Declination +42° 54' 52"
Apparent magnitude (V) +3.45
Distance 134 ± 4 ly
(41 ± 1 pc)
Spectral type A2IV
Other designations
Tania Borealis,
33 Ursae Majoris, HR 4033,
HD 89021, BD+43 2005,
FK5 383, HIP 50372,
SAO 43268, GC 14113

Lambda Ursae Majoris (λ UMa / λ Ursae Majoris) is a star in the constellation Ursa Major. It also has the proper names Tania Borealis (former Tania borealis[1]) meaning "the Northern (star) of Tania." The word Tania comes from the Arabic phrase (al-Qafzah) al-Thāniyah meaning "the Second (Leap)" (the distinctions "northern" (borealis) is added in Latin), and Alkafzah Borealis. With Mu Ursae Majoris, they were Chung Tae (中台), the Middle Dignitary, in Chinese astronomy.[2]

Lambda Ursae Majoris is a white A-type subgiant with an apparent magnitude of 3.5m. It is approximately 135 light years from the Earth.


  1. ^ Piazzi, G., The Palermo Catalogue, Palermo, 1814.
  2. ^ Allen, Richard Hinckley (1899). Star-Names and Their Meanings. New York: G. E. Stechert.  , p.443.


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