Tau Persei

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Tau Persei
Diagram showing star positions and boundaries of the Perseus constellation and its surroundings
Cercle rouge 100%.svg

Location of τ Persei (circled)
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Perseus
Right ascension 02h 54m 15.46s
Declination +52° 45' 45.0"
Apparent magnitude (V) +3.93
Distance 248 ly
(76 pc)
Spectral type G4III...
Other designations
τ Persei, τ Per, Tau Per, 18 Per, BD+44°631, CCDM J03095+4451A, GC 3462, HD 17878, HIP 13531, HR 854, IDS 02472+5221 A, PPM 28080, SAO 23685, WDS J02543+5246A

Tau Persei (Tau Per, τ Persei, τ Per) is multiple star system in constellation of Perseus, with an apparent magnitude of +3.93. The primary component is a yellow G-type giant. It is approximately 248 light years from Earth.

Tau Persei is moving through the Galaxy at a speed of 2.8 km/s relative to the Sun. Its projected Galactic orbit carries it between 24,100 and 34,200 light years from the center of the Galaxy.[1]


In Chinese, 大陵 (Dà Líng), meaning Mausoleum, refers to an asterism consisting of τ Persei, 9 Persei, ι Persei, κ Persei, β Persei, ρ Persei, 16 Persei and 12 Persei. Consequently, τ Persei itself is known as 大陵二 (Dà Líng èr, English: the Second Star of Mausoleum.).[2]