Astronomy:53 Virginis
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Virgo |
| Right ascension | 13h 12m 03.54378s[1] |
| Declination | −16° 11′ 54.9682″[1] |
| Apparent magnitude (V) | 5.04[2] |
| Characteristics | |
| Spectral type | F5.5 V[3] |
| B−V color index | 0.46[2] |
| Astrometry | |
| Radial velocity (Rv) | −12.7±0.2[4] km/s |
| Proper motion (μ) | RA: +97.32[1] mas/yr Dec.: −287.65[1] mas/yr |
| Parallax (π) | 29.49 ± 0.29[1] mas |
| Distance | 111 ± 1 ly (33.9 ± 0.3 pc) |
| Absolute magnitude (MV) | 2.46±0.03[5] |
| Details[6] | |
| Mass | 1.21 M☉ |
| Radius | 3.0[7] R☉ |
| Luminosity | 9.45[2] L☉ |
| Surface gravity (log g) | 3.85±0.14 cgs |
| Temperature | 6,346±216 K |
| Metallicity [Fe/H] | −0.04±0.04[8] dex |
| Rotational velocity (v sin i) | 13.5±0.6[5] km/s |
| Age | 2.923 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
53 Virginis is a single,[10] yellow-white hued star in the zodiac constellation of Virgo. It is faintly visible to the naked eye, having an apparent visual magnitude of 5.04.[2] Based upon an annual parallax shift of 29.49±0.29 mas,[1] it is located 111 light years away. The star is moving closer to the Sun with a heliocentric radial velocity of −12.7 km/s.[4] It has a relatively high rate of proper motion, traversing the celestial sphere at the rate of 284±18 mas/yr along a position angle of 162.2°.[11]
Gray et al. (2006) assigned this star a stellar classification of F5.5 V,[3] matching an ordinary F-type main-sequence star. Older studies, such as Malaroda (1975)[12] or Eggen (1955),[13] listed a class of F5 III-IV or F6 III-IV, suggesting a more evolved condition. It is spinning with a projected rotational velocity of 13.5[5] km/s and appears to be undergoing differential rotation.[10] The star is nearly three[6] billion years old, with 1.21[6] times the mass of the Sun and about three times the Sun's radius.[7] It is radiating over nine[2] times the Sun's luminosity from its photosphere at an effective temperature of around 6,346 K.[6]
The star has three visual companions, the nearest being a magnitude 12.5 star located at an angular separation of 104.10″ along a position angle of 1°, as of 2000.[14]
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 2.4 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
- ↑ 3.0 3.1 Gray, R. O. et al. (July 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 De Bruijne, J. H. J.; Eilers, A.-C. (2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics 546: A61, doi:10.1051/0004-6361/201219219, Bibcode: 2012A&A...546A..61D.
- ↑ 5.0 5.1 5.2 Paunzen, E. et al. (July 2014), "Investigating the possible connection between λ Bootis stars and intermediate Population II type stars", Astronomy & Astrophysics 567: 8, doi:10.1051/0004-6361/201423817, A67, Bibcode: 2014A&A...567A..67P.
- ↑ 6.0 6.1 6.2 6.3 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. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy and Astrophysics 367 (2): 521–524, doi:10.1051/0004-6361:20000451, Bibcode: 2001A&A...367..521P.
- ↑ Prugniel, Ph. et al. (July 2011), "The atmospheric parameters and spectral interpolator for the MILES stars", Astronomy & Astrophysics 531: A165, doi:10.1051/0004-6361/201116769, Bibcode: 2011A&A...531A.165P.
- ↑ "53 Vir". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=53+Vir.
- ↑ 10.0 10.1 Ammler-von Eiff, Matthias; Reiners, Ansgar (June 2012), "New measurements of rotation and differential rotation in A-F stars: are there two populations of differentially rotating stars?", Astronomy & Astrophysics 542: A116, doi:10.1051/0004-6361/201118724, Bibcode: 2012A&A...542A.116A.
- ↑ Wroblewski, H.; Torres, C. (March 1998), "New proper motion determination of Luyten catalogue stars (LTT) with declination between -5° and -30° and right ascension between 0h and 13h 30m", Astronomy and Astrophysics Supplement 128: 457–458, doi:10.1051/aas:1998157, Bibcode: 1998A&AS..128..457W
- ↑ Malaroda, S. (August 1975), "Study of the F-type stars. I. MK spectral types", Astronomical Journal 80: 637–641, doi:10.1086/111786, Bibcode: 1975AJ.....80..637M.
- ↑ Eggen, O. J. (1955), "The color-luminosity array for stars near the Sun", Astronomical Journal 60: 401, doi:10.1086/107248, Bibcode: 1955AJ.....60..401E
- ↑ Mason, B. D. et al. (2014), "The Washington Visual Double Star Catalog", The Astronomical Journal 122 (6): 3466, doi:10.1086/323920, Bibcode: 2001AJ....122.3466M.
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