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ν Ursae Majoris
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Ursa Major
Right ascension 11h 18m 28.7s
Declination +33° 05' 39"
Apparent magnitude (V) +3.49
Distance 421 ± 43 ly
(129 ± 13 pc)
Spectral type K3-IIIBa0.3
Other designations
Alula Borealis, 54 Ursae Majoris,
HR 4377, HD 98262,
BD+33 2098, FK5 425,
HIP 55219, SAO 62486,
GC 15547, ADS 8123,
CCDM 11185+3306

Nu Ursae Majoris (ν UMa / ν Ursae Majoris) is a binary star in the constellation Ursa Major. It is approximately 400 light years from the Earth.

And has the proper name Alula Borealis (former Alula borealis[1], and erroneously Alula Boreale[2]) meaning "the Northern (star) of Alula." The words Alula and el-Awla[3] (with ξ) come from the Arabic phrase (al-Qafzah) al-Ūlā meaning "the first (leap)" (the distinctions "northern" (borealis) is added in Latin). With Xi Ursae Majoris, they were Hea Tae (下台), the Lower Dignitary, in Chinese astronomy.,[4]

The primary component, Nu Ursae Majoris A, is an orange K-type giant with an apparent magnitude of 3.5m. It has a 10th magnitude companion, Nu Ursae Majoris B 7.1 arcseconds away.

Notes

  1. ^ Piazzi, G., The Palermo Catalogue, Palermo, 1814.
  2. ^ Bečvář, A., Atlas Coeli (Atlas of the Heavens) II - Catalogue, Plague, 1964.
  3. ^ Bode J., Uranographia, Berlin, 1801.
  4. ^ Allen, Richard Hinckley (1899). Star-Names and Their Meanings. New York: G. E. Stechert.  , p.443.
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