109 Virginis

109 Virginis

Chart of Virgo; 109 Virginis forms the Virgin's right foot
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Virgo
Right ascension 14h 46m 14.92345s
Declination +01° 53′ 34.3818″
Apparent magnitude (V) +3.72
Characteristics
Evolutionary stage main sequence
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: −115.08 mas/yr
Dec.: −20.464 mas/yr
Parallax (π)24.2814±0.2271 mas
Distance134 ± 1 ly
(41.2 ± 0.4 pc)
Details
Mass2.40 M☉
Radius2.57 R☉
Luminosity46.8±1.1 L☉
Surface gravity (log g)3.83±0.12 cgs
Temperature9,420±130 K
Metallicity [Fe/H]−0.41±0.14 dex
Rotational velocity (v sin i)285 km/s
Age320 Myr
Other designations
Maenalus, 109 Vir, BD+02°2862, FK5 547, HD 130109, HIP 72220, HR 5511, SAO 120648
Database references
SIMBADdata

109 Virginis, also named Maenalus, is a single, white-hued star in the zodiac constellation of Virgo, located some 134.5 light years away from Earth. It is the seventh-brightest member of this constellation, having an apparent visual magnitude of +3.72.

This is an A-type main-sequence star with a stellar classification of A0 V, and is a suspected chemically peculiar star. However, Abt and Morrell (1995) gave it a class of A0 IIInn, matching a giant star with "nebulous" lines. It is spinning rapidly with a projected rotational velocity of 285 km/s, which is giving the star an oblate shape with an equatorial bulge that is an estimated 31% larger than the polar radius. The star is 320 million years old with 2.4 times the mass of the Sun and about 2.57 times the Sun's radius. It is radiating 47 times the Sun's luminosity from its photosphere at an effective temperature of 9,420 K.

109 Virginis was the brightest star in the obsolete constellation Mons Maenalus, representing a mountain in the Peloponnese, Greece. The IAU Working Group on Star Names approved the name Maenalus for 109 Virginis on 15 April 2026, after the obsolete constellation.

Notes

  1. 1 2 Calculated, using the Stefan-Boltzmann law and the star's effective temperature and luminosity, with respect to the solar nominal effective temperature of 5,772 K:

References

  1. 1 2 3 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. XHIP record for this object at VizieR.
  2. 1 2 3 4 5 6 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
  3. 1 2 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.
  4. 1 2 3 4 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.
  5. 1 2 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.
  6. ↑ 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.
  7. 1 2 3 4 5 Paunzen, E; Supíková, J; Bernhard, K; Hümmerich, S; Prišegen, M (2021-07-01), "Magnetic chemically peculiar stars investigated by the Solar Mass Ejection Imager", Monthly Notices of the Royal Astronomical Society, 504 (3): 3758–3772, arXiv:2105.02206, Bibcode:2021MNRAS.504.3758P, doi:10.1093/mnras/stab1100, ISSN 0035-8711.
  8. 1 2 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.
  9. 1 2 3 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.
  10. ↑ "109 Vir", SIMBAD, Centre de données astronomiques de Strasbourg, retrieved 2019-02-13.
  11. 1 2 "IAU Catalog of Star Names". Retrieved 20 April 2026.
  12. ↑ 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.
  13. ↑ 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.
  14. ↑ 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.
  15. ↑ Ian Ridpath's Star Tales - Mons Maenalus