Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Centaurus |
Right ascension | 12h 37m 42.16377s [1] |
Declination | −48° 32′ 28.6899″ [1] |
Apparent magnitude (V) | +3.86 [2] |
Characteristics | |
Spectral type | A0 V [3] or A1 IVnn [4] |
U−B color index | +0.04 [2] |
B−V color index | +0.06 [2] |
Astrometry | |
Radial velocity (Rv) | +5.5±2.3 [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] |
Distance | 131 ± 3
ly (40.2 ± 0.9 pc) |
Absolute magnitude (MV) | +0.83 [6] |
Details | |
Mass | 2.31 [7] M☉ |
Radius | 2.2 [8] R☉ |
Luminosity | 42 [6] L☉ |
Surface gravity (log g) | 4.02±0.14 [7] cgs |
Temperature | 10,533±358 [7] K |
Rotational velocity (v sin i) | 296.8±3.8 [9] km/s |
Age | 132 [7] Myr |
Other designations | |
Database references | |
SIMBAD | data |
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. There is a 98% chance that it is a co-moving companion of Gamma Centauri; the two stars have an estimated separation of 1.7 ly (0.53 pc). [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 [7] million years old and is spinning rapidly with a projected rotational velocity of 296.8 [9] km/s. 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 [7] times the mass of the Sun and 2.2 [8] times the Sun's radius.
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cite web}}
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Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Centaurus |
Right ascension | 12h 37m 42.16377s [1] |
Declination | −48° 32′ 28.6899″ [1] |
Apparent magnitude (V) | +3.86 [2] |
Characteristics | |
Spectral type | A0 V [3] or A1 IVnn [4] |
U−B color index | +0.04 [2] |
B−V color index | +0.06 [2] |
Astrometry | |
Radial velocity (Rv) | +5.5±2.3 [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] |
Distance | 131 ± 3
ly (40.2 ± 0.9 pc) |
Absolute magnitude (MV) | +0.83 [6] |
Details | |
Mass | 2.31 [7] M☉ |
Radius | 2.2 [8] R☉ |
Luminosity | 42 [6] L☉ |
Surface gravity (log g) | 4.02±0.14 [7] cgs |
Temperature | 10,533±358 [7] K |
Rotational velocity (v sin i) | 296.8±3.8 [9] km/s |
Age | 132 [7] Myr |
Other designations | |
Database references | |
SIMBAD | data |
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. There is a 98% chance that it is a co-moving companion of Gamma Centauri; the two stars have an estimated separation of 1.7 ly (0.53 pc). [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 [7] million years old and is spinning rapidly with a projected rotational velocity of 296.8 [9] km/s. 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 [7] times the mass of the Sun and 2.2 [8] times the Sun's radius.
{{
cite web}}
: CS1 maint: postscript (
link)