53 Virginis

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]

53 Virginis
Observation data
Epoch J2000      Equinox J2000
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
Distance111 ± 1 ly
(33.9 ± 0.3 pc)
Absolute magnitude (MV)2.46±0.03[5]
Details[6]
Mass1.21 M☉
Radius3.0[7] R☉
Luminosity9.45[2] L☉
Surface gravity (log g)3.85±0.14 cgs
Temperature6,346±216 K
Metallicity [Fe/H]−0.04±0.04[8] dex
Rotational velocity (v sin i)13.5±0.6[5] km/s
Age2.923 Gyr
Other designations
53 Vir, NSV 6136, BD−15° 3613, HD 114642, HIP 64407, HR 4981, SAO 157788, WDS J13121-1612A[9]
Database references
SIMBADdata

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. 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.
  2. Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015.
  3. 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, arXiv:astro-ph/0603770, Bibcode:2006AJ....132..161G, doi:10.1086/504637.
  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.
  5. Paunzen, E.; et al. (July 2014), "Investigating the possible connection between λ Bootis stars and intermediate Population II type stars", Astronomy & Astrophysics, 567: 8, arXiv:1406.3936, Bibcode:2014A&A...567A..67P, doi:10.1051/0004-6361/201423817, A67.
  6. 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, arXiv:1501.03154, Bibcode:2015ApJ...804..146D, doi:10.1088/0004-637X/804/2/146.
  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 (2): 521–524, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451.
  8. Prugniel, Ph.; et al. (July 2011), "The atmospheric parameters and spectral interpolator for the MILES stars", Astronomy & Astrophysics, 531: A165, arXiv:1104.4952, Bibcode:2011A&A...531A.165P, doi:10.1051/0004-6361/201116769.
  9. "53 Vir". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-04-05.
  10. Ammler-von Eiff, M.; Reiners, A. (2012), "New measurements of rotation and differential rotation in A-F stars: are there two populations of differentially rotating stars?", Astronomy & Astrophysics, 542: 31, arXiv:1204.2459, Bibcode:2012A&A...542A.116A, doi:10.1051/0004-6361/201118724, A116.
  11. 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, Bibcode:1998A&AS..128..457W, doi:10.1051/aas:1998157
  12. Malaroda, S. (August 1975), "Study of the F-type stars. I. MK spectral types", Astronomical Journal, 80: 637–641, Bibcode:1975AJ.....80..637M, doi:10.1086/111786.
  13. Eggen, O. J. (1955), "The color-luminosity array for stars near the Sun", Astronomical Journal, 60: 401, Bibcode:1955AJ.....60..401E, doi:10.1086/107248
  14. Mason, B. D.; et al. (2014), The Washington Visual Double Star Catalog, Bibcode:2001AJ....122.3466M, doi:10.1086/323920.
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