Theta Sculptoris

Theta Sculptoris
Location of θ Sculptoris (circled)
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]
Distance70.6 ± 0.2 ly
(21.65 ± 0.07 pc)
Absolute magnitude (MV)3.52[2]
Details[2]
Mass1.25 M☉
Radius1.40±0.05 R☉
Luminosity3.09[4] L☉
Surface gravity (log g)4.25±0.10 cgs
Temperature6,395±80 K
Metallicity [Fe/H]−0.07±0.07 dex
Rotational velocity (v sin i)1.0±1.0 km/s
Age1.6+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
SIMBADdata

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]

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]

  1. ^ a b c d e f Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c d e Cite error: The named reference Fuhrmann2012 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Gray2006 was invoked but never defined (see the help page).
  4. ^ a b c d e f g Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Fuhrmann2015 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).