Tau Centauri

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τ Centauri
Template:Location mark
Location of τ Centauri (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Centaurus
Right ascension Template:RA[1]
Declination Template:DEC[1]
Apparent magnitude (V) +3.86[2]
Characteristics
Spectral type A0 V[3] or A1 IVnn[4]
U−B Template:Engvar +0.04[2]
B−V Template:Engvar +0.06[2]
Astrometry
Radial velocity (Rv)Script error: No such module "val".[5] km/s
Proper motion (μ) RA: −186.26[1] mas/yr
Dec.: −6.01[1] mas/yr
Parallax (π)24.85±0.53 mas[1]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)+0.83[6]
Details
Mass2.31[7] Template:Solar mass
Radius2.7ref name=tycho-gaia/> Template:Solar radius
Luminosity39[8] Template:Solar luminosity
Surface gravity (log g)Script error: No such module "val".[7] cgs
TemperatureScript error: No such module "val".[7] K
Rotational velocity (v sin i)Script error: No such module "val".[9] km/s
Age132[7] Myr
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
Template:Odlist[10]
Database references
SIMBADdata

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Tau Centauri, Latinized from τ Centauri, is a solitary[11] star in the southern constellation of Centaurus. It is visible to the naked eye with an apparent visual magnitude of +3.86.[2] The distance to this star, based upon an annual parallax shift of 24.85 mas,[1] is 131 light years. It makes a star system with Gamma Centauri at 98% probability, both separated by Script error: No such module "convert"..[12]

This is an A-type star with stellar classifications of A0 V[3] or A1 IVnn,[4] indicating it may be a main sequence star or a more evolved subgiant star. It is around 132 million years old[7] and is spinning rapidly with a projected rotational velocity of 296.8 km/s.[9] This is giving the star an oblate shape, with an estimated equatorial girth that is 30% larger than the polar radius.[13] The star has an estimated 2.3 times the mass of the Sun[7] and 2.7 times the Sun's radius.[8]

References

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  7. ↑ a b c d e f Script error: No such module "citation/CS1".
  8. ↑ a b Script error: No such module "citation/CS1".
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  10. ↑ Template:Cite simbad
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  12. ↑ Script error: No such module "citation/CS1".
  13. ↑ Script error: No such module "citation/CS1".

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Template:Stars of Centaurus

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