Tau Ursae Majoris

Tau Ursae Majoris

Location of τ Ursae Majoris (circled)
Observation data Epoch J2000.0      Equinox J2000.0
Constellation	Ursa Major
Right ascension	09^h 10^m 55.1^s
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

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