θ Sculptoris, Latinized as Theta Sculptoris, is a star in the southern constellation of Sculptor. This object is visible to the naked eye as a dim, yellow-white hued star with an apparent visual magnitude of +5.24.[2] It is located 71 light years from the Sun based on parallax.[1] The object is drifting closer with a radial velocity of −21 km/s, and may come to within 49 light-years in half a million years.[4]
Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Sculptor |
Right ascension | 00h 11m 44.02079s[1] |
Declination | −35° 07′ 59.2320″[1] |
Apparent magnitude (V) | +5.236±0.005[2] |
Characteristics | |
Evolutionary stage | main sequence |
Spectral type | F5V[3] |
B−V color index | 0.459±0.002[4] |
Astrometry | |
Radial velocity (Rv) | −21.1±0.3[4] km/s |
Proper motion (μ) | RA: +171.529[1] mas/yr Dec.: +126.670[1] mas/yr |
Parallax (π) | 46.1936 ± 0.1565 mas[1] |
Distance | 70.6 ± 0.2 ly (21.65 ± 0.07 pc) |
Absolute magnitude (MV) | 3.52[2] |
Details[2] | |
Mass | 1.25 M☉ |
Radius | 1.40±0.05 R☉ |
Luminosity | 3.09[4] L☉ |
Surface gravity (log g) | 4.25±0.10 cgs |
Temperature | 6,395±80 K |
Metallicity [Fe/H] | −0.07±0.07 dex |
Rotational velocity (v sin i) | 1.0±1.0 km/s |
Age | 1.6+2.4 −0.5[4] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
According to Fuhrmann and Chini (2015) this is an astrometric binary system,[6] although Eggleton and Tokovinin (2008) deemed it to be a single star.[7] The visible component is an ordinary F-type main-sequence star with a stellar classification of F5V.[3] It is around 1.6[4] billion years old with 1.25 times the mass of the Sun and 1.40 times the Sun's radius. The star is radiating three[4] times the luminosity of the Sun from its photosphere at an effective temperature of 6,395 K.[2]
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