Rho Tucanae

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ρ Tucanae
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Tucana
Right ascension 00h 42m 28.4s
Declination −65° 28' 05"
Apparent magnitude (V) +5.38
Absolute magnitude (V) +2.75[1]
Distance 133 ± 3 ly
(41 ± 1 pc)
Spectral type F6V
Other designations
HR 187, HD 4089, CP-66 47, FK5 2047, HIP 3330, SAO 248237, GC 851

Rho Tucanae (ρ Tuc, ρ Tucanae) is a binary star in the constellation Tucana.

Rho Tucanae is a spectroscopic binary composed of two yellow-white F-type main sequence dwarfs with a combined apparent magnitude of +5.38. The binary star has a rotation period of 4.82 days. It is approximately 133 light years from Earth.

The projected rotational velocity is 23.5±1.2 km/s.[1]


  1. ^ a b Reiners, A. (January 2006), "Rotation- and temperature-dependence of stellar latitudinal differential rotation", Astronomy and Astrophysics, 446 (1): 267–277, arXiv:astro-ph/0509399Freely accessible, Bibcode:2006A&A...446..267R, doi:10.1051/0004-6361:20053911.