Zeta Pictoris

ζ Pictoris, Latinised as Zeta Pictoris, is a solitary[10] star in the southern constellation of Pictor. It is visible to the naked eye with an apparent visual magnitude of +5.43.[2] Based upon an annual parallax shift of 28.00 mas as seen from the Earth,[1] the system is located 116.5 light years from the Sun.

Zeta Pictoris
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Pictor
Right ascension 05h 19 22.13548m [1]
Declination −50° 36′ 21.4820″[1]
Apparent magnitude (V) +5.43[2]
Characteristics
Spectral type F6 IV[3]
U−B color index +0.01[2]
B−V color index +0.52[2]
Astrometry
Radial velocity (Rv)+43.8±0.2[4] km/s
Proper motion (μ) RA: +23.64[1] mas/yr
Dec.: +227.43[1] mas/yr
Parallax (π)28.00 ± 0.23 mas[1]
Distance116.5 ± 1.0 ly
(35.7 ± 0.3 pc)
Absolute magnitude (MV)2.65±0.04[5]
Details[6]
Mass1.39 M☉
Radius5.3[7] R☉
Surface gravity (log g)4.07±0.07 cgs
Temperature6,411±56 K
Metallicity [Fe/H]0.07 dex
Rotational velocity (v sin i)5.6±1.0[8] km/s
Age2.6 Gyr
Other designations
ζ Pic, CD−50° 1723, HD 35072, HIP 24829, HR 1767, SAO 233926[9]
Database references
SIMBADdata

This is an evolving F-type subgiant star with a stellar classification of F6 IV.[3] It is a thin disk[11] star with an estimated 1.4[6] times the mass of the Sun and about 5.3[7] times the Sun's radius. At the age of 2.6[6] billion years, Zeta Pictoris is spinning with a projected rotational velocity of 5.6 km/s.[8]

References
  1. van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357, S2CID 18759600.
  2. Przybylski, A.; Kennedy, P. M. (1965), "Radial velocities and three-colour photometry of 166 southern stars", Monthly Notices of the Royal Astronomical Society, 131: 95–104, Bibcode:1965MNRAS.131...95P, doi:10.1093/mnras/131.1.95.
  3. Gray, R. O.; et al. (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): 161–70, arXiv:astro-ph/0603770, Bibcode:2006AJ....132..161G, doi:10.1086/504637, S2CID 119476992.
  4. De Bruijne, J. H. J.; Eilers, A.-C. (2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics, 546: A61, arXiv:1208.3048, Bibcode:2012A&A...546A..61D, doi:10.1051/0004-6361/201219219, S2CID 59451347.
  5. Soubiran, C.; Girard, P. (July 2005), "Abundance trends in kinematical groups of the Milky Way's disk", Astronomy and Astrophysics, 438 (1): 1391–51, arXiv:astro-ph/0503498, Bibcode:2005A&A...438..139S, doi:10.1051/0004-6361:20042390, S2CID 42282870.
  6. Bensby, T.; et al. (2014), "Exploring the Milky Way stellar disk. A detailed elemental abundance study of 714 F and G dwarf stars in the solar neighbourhood", Astronomy & Astrophysics, 562 (A71): 28, arXiv:1309.2631, Bibcode:2014A&A...562A..71B, doi:10.1051/0004-6361/201322631, S2CID 118786105.
  7. Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy and Astrophysics (Third ed.), 367: 521–524, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451, S2CID 425754.
  8. De Medeiros, J. R.; Mayor, M. (1999), "A catalog of rotational and radial velocities for evolved stars", Astronomy and Astrophysics Supplement Series, 139 (3): 433, arXiv:astro-ph/0608248, Bibcode:1999A&AS..139..433D, doi:10.1051/aas:1999401.
  9. "zet Pic". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-06-22.
  10. 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, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976.
  11. Bensby, T.; Feltzing, S. (April 2006), "The origin and chemical evolution of carbon in the Galactic thin and thick discs*" (PDF), Monthly Notices of the Royal Astronomical Society, 367 (3): 1181–1193, arXiv:astro-ph/0601130, Bibcode:2006MNRAS.367.1181B, doi:10.1111/j.1365-2966.2006.10037.x, hdl:2027.42/74854, S2CID 7771039.
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