Short description: Star in the constellation Sculptor
Theta Sculptoris
Location of θ Sculptoris (circled) |
Observation data
Equinox J2000.0]] (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[1] mas |
| 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 |
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]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.
- ↑ 2.0 2.1 2.2 2.3 2.4 Fuhrmann, K.; Chini, R. (2012), "Multiplicity among F-type Stars", The Astrophysical Journal Supplement 203 (2): 20, doi:10.1088/0067-0049/203/2/30, 30, Bibcode: 2012ApJS..203...30F.
- ↑ 3.0 3.1 Gray, R. O.; Corbally, C. J.; Garrison, R. F.; McFadden, M. T.; Bubar, E. J.; McGahee, C. E.; O'Donoghue, A. A.; Knox, E. R. (2006), "Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 pc--The Southern Sample", The Astronomical Journal 132 (1): 161–170, doi:10.1086/504637, Bibcode: 2006AJ....132..161G.
- ↑ 4.0 4.1 4.2 4.3 4.4 4.5 4.6 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
- ↑ "tet Scl". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=tet+Scl.
- ↑ Fuhrmann, K.; Chini, R. (August 2015), "Multiplicity among F-type stars. II", The Astrophysical Journal 809 (1): 19, doi:10.1088/0004-637X/809/1/107, 107, Bibcode: 2015ApJ...809..107F.
- ↑ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society 389 (2): 869–879, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E.
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