PROFILBARU.COM

109 Virginis
Observation data; Epoch J2000.0 Equinox J2000.0 (ICRS)
Constellation	Virgo
Right ascension	14h 46m 14.92536s
Declination	+01° 53′ 34.3845″
Apparent magnitude (V)	+3.72
Characteristics
Spectral type	A0 V
B−V color index	−0.005±0.006
Variable type	None
Astrometry
Radial velocity (Rv)	−6.1±2.7 km/s
Proper motion (μ)	RA: −114.03 mas/yr ; Dec.: −22.13 mas/yr
Parallax (π)	24.25 ± 0.18 mas
Distance	134.5 ± 1.0 ly ; (41.2 ± 0.3 pc)
Details
Mass	2.58±0.02 M☉
Radius	2.7 R☉
Luminosity	62.8+1.8; −1.7 L☉
Surface gravity (log g)	3.83±0.12 cgs
Temperature	9683+112; −111 K
Metallicity [Fe/H]	−0.41±0.14 dex
Rotational velocity (v sin i)	285 km/s
Age	320 Myr
Other designations
	109 Vir, BD+02°2862, FK5 547, HD 130109, HIP 72220, HR 5511, SAO 120648
Database references
SIMBAD	data

109 Virginis is a single,^[9] white-hued star in the zodiac constellation of Virgo, located some 134.5 light years away from the Sun. It is the seventh-brightest member of this constellation, having an apparent visual magnitude of +3.72.^[2]

This is an A-type main-sequence star with a stellar classification of A0 V,^[3] and is a suspected chemically peculiar star.^[6]^[11] However, Abt and Morrell (1995) gave it a class of A0 IIInn,^[12] matching a giant star with "nebulous" lines. It is spinning rapidly with a projected rotational velocity of 285 km/s,^[6] which is giving the star an oblate shape with an equatorial bulge that is an estimated 31% larger than the polar radius.^[13] The star is 320^[9] million years old with 2.58^[6] times the mass of the Sun and about 2.7^[7] times the Sun's radius. It is radiating 63^[6] times the Sun's luminosity from its photosphere at an effective temperature of 9,683 K.^[6]

References

^ ^a ^b ^c ^d ^e Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
^ ^a ^b Malagnini, M. L.; Morossi, C. (November 1990), "Accurate absolute luminosities, effective temperatures, radii, masses and surface gravities for a selected sample of field stars", Astronomy and Astrophysics Supplement Series, 85 (3): 1015–1019, Bibcode:1990A&AS...85.1015M.
^ ^a ^b Cowley, A.; et al. (April 1969), "A study of the bright A stars. I. A catalogue of spectral classifications", Astronomical Journal, 74: 375–406, Bibcode:1969AJ.....74..375C, doi:10.1086/110819
^ ^a ^b 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, S2CID 119257644.
^ Adelman, Saul J. (November 1997), "On the possible variability of the main sequence A stars theta Virginis and 109 Virginis", Astronomy and Astrophysics Supplement Series, 125 (3): 497–499, Bibcode:1997A&AS..125..497A, doi:10.1051/aas:1997105.
^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ Zorec, J.; Royer, F. (January 2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics, 537: A120, arXiv:1201.2052, Bibcode:2012A&A...537A.120Z, doi:10.1051/0004-6361/201117691, S2CID 55586789.
^ ^a ^b Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy and Astrophysics, 367 (Third ed.): 521–524, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451, S2CID 425754.
^ ^a ^b Wu, Yue; et al. (January 2011), "Coudé-feed stellar spectral library - atmospheric parameters", Astronomy and Astrophysics, 525: A71, arXiv:1009.1491, Bibcode:2011A&A...525A..71W, doi:10.1051/0004-6361/201015014, S2CID 53480665.
^ ^a ^b ^c De Rosa, R. J.; et al. (2014), "The VAST Survey - III. The multiplicity of A-type stars within 75 pc", Monthly Notices of the Royal Astronomical Society, 437 (2): 1216–1240, arXiv:1311.7141, Bibcode:2014MNRAS.437.1216D, doi:10.1093/mnras/stt1932, S2CID 88503488.
^ "109 Vir". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-02-13.
^ Renson, P.; Manfroid, J. (May 2009), "Catalogue of Ap, HgMn and Am stars", Astronomy and Astrophysics, 498 (3): 961–966, Bibcode:2009A&A...498..961R, doi:10.1051/0004-6361/200810788.
^ Abt, Helmut A.; Morrell, Nidia I. (1995), "The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars", Astrophysical Journal Supplement, 99: 135, Bibcode:1995ApJS...99..135A, doi:10.1086/192182.
^ Belle, G. T. (2012), "Interferometric observations of rapidly rotating stars", The Astronomy and Astrophysics Review, 20 (1): 51, arXiv:1204.2572, Bibcode:2012A&ARv..20...51V, doi:10.1007/s00159-012-0051-2, S2CID 119273474.