Nu Ursae Majoris

Nu Ursae Majoris
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.

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.

It has the proper name 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)" (plus "Borealis", "northern" in Latin). It and Xi Ursae Majoris are Hea Tae （下台）, the Lower Dignitary, in Chinese astronomy.[4]

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.
v · d · eStars of Ursa Major
Bayer
α (Dubhe) • β (Merak) • γ (Phecda) • δ (Megrez) • ε (Alioth) • ζ (Mizar) • η (Alkaid) • θ (Alhaud) • ι (Talitha Bor) • κ (Talitha Aus) • λ (Tania Bor) • μ (Tania Aus) • ν (Alula Bor) • ξ (Alula Aus) • ο (Muscida) • π¹ • π² • ρ • σ¹ • σ² • τ • υ • φ • χ • ψ • ω • b • c • d • e • f • g (Alcor) • h • A
Flamsteed
1 (ο, Muscida) • 2 (A) • 3 (π¹) • 4 (π²) • 5 (b) • 6 • 7 • 8 (ρ) • 9 (ι, Talitha Bor) • 11 (σ¹) • 12 (κ, Talitha Aus) • 13 (σ²) • 14 (τ) • 15 (f) • 16 (c) • 17 • 18 (e) • 19 • 20 • 21 • 22 • 23 (h) • 24 (d) • 25 (θ, Alhaud) • 26 • 27 • 28 • 29 (υ) • 30 (φ) • 31 • 32 • 33 (λ, Tania Bor) • 34 (μ, Tania Aus) • 35 • 36 • 37 • 38 • 39 • 40 • 41 • 42 • 43 • 44 • 45 (ω) • 46 • 47 • 48 (β, Merak) • 49 • 50 (α, Dubhe) • 51 • 52 (ψ) • 53 (ξ, Alula Aus) • 54 (ν, Alula Bor) • 55 • 56 • 57 • 58 • 59 • 60 • 61 • 62 • 63 (χ) • 64 (γ, Phecda) • 65 • 66 • 67 • 68 • 69 (δ, Megrez) • 70 • 71 • 72 • 73 • 74 • 75 • 76 • 77 (ε, Alioth) • 78 • 79 (ζ, Mizar) • 80 (g, Alcor) • 81 • 82 • 83 • 84 • 85 (η, Alkaid) • 86 • 55 Cam • 56 Cam • 57 Cam • 1 CVn • 14 LMi • 15 LMi • 47 LMi • 37 Lyn • 41 Lyn • 44 Lyn
Nearby
Lalande 21185 • WISE 1405+5534 • Gliese 412 • Groombridge 1618 • Gliese 338 • GJ 1151 • ξ (Alula Aus) • Gliese 450 • Gliese 424 • Groombridge 1830
Other
R • S • W • Winnecke 4
List
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