Astronomy:Xi Virginis
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Short description: Star in the constellation Virgo
  | |
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Virgo |
| Right ascension | 11h 45m 17.04027s[1] |
| Declination | +08° 15′ 29.2150″[1] |
| Apparent magnitude (V) | 4.83[2] |
| Characteristics | |
| Spectral type | A4 V[3] |
| U−B color index | +0.10[2] |
| B−V color index | +0.17[2] |
| Astrometry | |
| Radial velocity (Rv) | −0.5[4] km/s |
| Proper motion (μ) | RA: +60.08[1] mas/yr Dec.: −24.50[1] mas/yr |
| Parallax (π) | 26.73 ± 0.25[1] mas |
| Distance | 122 ± 1 ly (37.4 ± 0.3 pc) |
| Absolute magnitude (MV) | +1.98[5] |
| Details | |
| Mass | 1.93[6] M☉ |
| Radius | 1.5[7] R☉ |
| Luminosity | 12.6[8] L☉ |
| Surface gravity (log g) | 4.31[6] cgs |
| Temperature | 8,172[8] K |
| Rotational velocity (v sin i) | 130[3] km/s |
| Age | 480[9] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Xi Virginis (ξ Vir, ξ Virginis) is a solitary[11] star in the zodiac constellation of Virgo. It is bright enough to be seen with the naked eye, having an apparent visual magnitude of 4.83.[2] The distance to this star is about 122 light years, as determined from parallax readings.[1]
Xi Virginis is an A-type main sequence star with a stellar classification of A4 V.[3] It has an estimated age of 480[9] million years and is spinning rapidly with a projected rotational velocity of 130 km/s.[3] It has about 150%[7] the Sun's radius and shines with 12.6[8] times the luminosity of the Sun.
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, doi:10.1051/0004-6361:20078357, Bibcode: 2007A&A...474..653V.
- ↑ 2.0 2.1 2.2 2.3 Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data. SIMBAD, Bibcode: 1986EgUBV........0M.
- ↑ 3.0 3.1 3.2 3.3 Abt, Helmut A.; Morrell, Nidia I. (July 1995), "The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars", Astrophysical Journal Supplement 99: 135, doi:10.1086/192182, Bibcode: 1995ApJS...99..135A.
- ↑ Wilson, R. E. (1953), "General Catalogue of Stellar Radial Velocities", Carnegie Institute Washington D.C. Publication, Bibcode: 1953GCRV..C......0W.
- ↑ Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
- ↑ 6.0 6.1 David, Trevor J.; Hillenbrand, Lynne A. (2015), "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets", The Astrophysical Journal 804 (2): 146, doi:10.1088/0004-637X/804/2/146, Bibcode: 2015ApJ...804..146D.
- ↑ 7.0 7.1 Pasinetti Fracassini, L. E. et al. (2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics", Astronomy & Astrophysics 367 (2): 521–24, doi:10.1051/0004-6361:20000451, Bibcode: 2001A&A...367..521P.
- ↑ 8.0 8.1 8.2 McDonald, I. et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society 427 (1): 343–57, doi:10.1111/j.1365-2966.2012.21873.x, Bibcode: 2012MNRAS.427..343M.
- ↑ 9.0 9.1 Vican, Laura (June 2012), "Age Determination for 346 Nearby Stars in the Herschel DEBRIS Survey", The Astronomical Journal 143 (6): 135, doi:10.1088/0004-6256/143/6/135, Bibcode: 2012AJ....143..135V.
- ↑ "ksi Vir -- Star", SIMBAD Astronomical Database (Centre de Données astronomiques de Strasbourg), http://simbad.u-strasbg.fr/simbad/sim-id?Ident=ksi+vir, retrieved 2016-09-08.
- ↑ 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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