Theta Sculptoris
Star in the constellation Sculptor
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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 ICRS | |
|---|---|
| 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 | |
| θ Scl, CD−35°4, FK5 6, GC 202, GJ 3013, HD 739, HIP 950, HR 35, SAO 192388, LTT 79, GSC 06995-01262[5] | |
| Database references | |
| SIMBAD | data |
This is an astrometric binary system.[6] 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]