Tau Ursae Majoris

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Tau Ursae Majoris
Diagram showing star positions and boundaries of the Ursa Major constellation and its surrounding
Diagram showing star positions and boundaries of the Ursa Major constellation and its surrounding

Location of τ Ursae Majoris (circled)
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Ursa Major
Right ascension 09h 10m 55.1s
Declination +63° 30' 49"
Apparent magnitude (V) +4.67
Characteristics
Spectral type F3-4IIIm
Astrometry
Distance 122 ± 3 ly
(37 ± 1 pc)
Other designations
τ Ursae Majoris, τ UMa, Tau UMa, 14 Ursae Majoris, BD+64 723A, CCDM J09110+6331A, FK5 2727, GC 12646, HD 78362, HIP 45075, HR 3624, IDS 09027+6355 A, PPM 16936, SAO 14796, WDS J09109+6331A.
Database references
SIMBAD data

Tau Ursae Majoris (Tau UMa, τ Ursae Majoris, τ UMa) is a binary star in the constellation Ursa Major. It is approximately 122 light years from Earth.

Tau Ursae Majoris is a spectroscopic binary which is classified as a yellow-white F-type giant with an apparent magnitude of +4.67. The binary system completes one orbit every 1062 days.

With φ, h, υ, θ, e, and f, it composed the Arabic asterism Sarīr Banāt al-Na'sh, the Throne of the daughters of Na'sh, and al-Haud, the Pond,[1]

References[edit]

  1. ^ Allen, Richard Hinckley (1899), Star-Names and Their Meanings, New York: G. E. Stechert, p. 442