Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Scorpius |
Right ascension | 16h 35m 52.95285s[1] |
Declination | −28° 12′ 57.6615″[1] |
Apparent magnitude (V) | +2.82[2] |
Characteristics | |
Spectral type | B0.2 V[3] |
U−B color index | −1.039[2] |
B−V color index | −0.252[2] |
Astrometry | |
Radial velocity (Rv) | +2.0[4] km/s |
Proper motion (μ) | RA: −9.89[1] mas/yr Dec.: −22.83[1] mas/yr |
Parallax (π) | 6.88 ± 0.53 mas[1] |
Distance | 470 ± 40 ly (150 ± 10 pc) |
Absolute magnitude (MV) | −4.2[5] |
Details | |
Mass | 15.0±0.1,[6] 14.5–14.7[7] M☉ |
Radius | 6.5[3] R☉ |
Luminosity | 20,400[7] L☉ |
Surface gravity (log g) | 4.24[8] cgs |
Temperature | 31,440,[9] 29,850[7] K |
Metallicity [Fe/H] | −0.14[8] dex |
Rotation | 41 days[10] |
Rotational velocity (v sin i) | 24[11] km/s |
Age | 5.7±1.0,[6] 5[7] Myr |
Other designations | |
Database references | |
SIMBAD | data |
Tau Scorpii, Latinized from τ Scorpii, formally known as Paikauhale /ˌpaɪkaʊˈhɑːleɪ/, is a star in the southern zodiac constellation of Scorpius. The apparent visual magnitude of Tau Scorpii is +2.8,[2] while parallax measurements yield a distance estimate of roughly 470 light-years (150 parsecs) from Earth.[1]
aaa474_2_653
was invoked but never defined (see the help page).apjs15_459
was invoked but never defined (see the help page).apj534_1_348
was invoked but never defined (see the help page).scfs
was invoked but never defined (see the help page).aaa216_1_44
was invoked but never defined (see the help page).mnras410_1_190
was invoked but never defined (see the help page).Pecaut
was invoked but never defined (see the help page).aaa282_3_867
was invoked but never defined (see the help page).aaa501_1_297
was invoked but never defined (see the help page).aar17_3_251
was invoked but never defined (see the help page).bsc1
was invoked but never defined (see the help page).SIMBAD
was invoked but never defined (see the help page).