109 Virginis

Star in the constellation Virgo 280px Chart of Virgo; 109 Virginis forms the Virgin's right foot J2000.0 J2000.0 (ICRS) Virgo 14 46 14.92345 +01 53 34.3818 +3.72 main sequence A0 V −0.005 0.006 None −6.1 2.7 -115.08 -20.464 24.2814 0.2271 2.40 logLT 1.67 9418.9 2radius 46.8 1.1 9420 130 commas 3.83 0.12 −0.41 0.14 285 320 Maenalus 109 Vir +02°2862 547 130109 72220 5511 120648 109+Vir 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.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.Ian Ridpath's Star Tales - Mons Maenalus The IAU Working Group on Star Names approved the name Maenalus for 109 Virginis on 15 April 2026, after the obsolete constellation. Notes radius 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 109 Vir 2019-02-13 cs2 . 3655377057091634304 cs2 72220 Malagnini M. L. Morossi C. 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 November 1990 1990A&AS...85.1015M . 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 10.1093/mnras/stab1100 free 2105.02206 2021MNRAS.504.3758P 0035-8711 . 1 The VAST Survey - III. The multiplicity of A-type stars within 75 pc De Rosa R. J. Patience J. Wilson P. A. Schneider A. Wiktorowicz S. J. Vigan A. Marois C. Song I. Macintosh B. Graham J. R. Doyon R. Bessell M. S. Thomas S. Lai O. Monthly Notices of the Royal Astronomical Society 437 2 1216–1240 2014 2014MNRAS.437.1216D . 1311.7141 10.1093/mnras/stt1932 free 88503488 Zorec J. Royer F. Rotational velocities of A-type stars. IV. Evolution of rotational velocities Astronomy & Astrophysics 537 A120 January 2012 10.1051/0004-6361/201117691 2012A&A...537A.120Z 1201.2052 55586789 . Interferometric observations of rapidly rotating stars Belle G. T. The Astronomy and Astrophysics Review 20 1 51 2012 10.1007/s00159-012-0051-2 2012A&ARv..20...51V 1204.2572 119273474 . 1 Wu Yue Singh H. P. Prugniel P. Gupta R. Koleva M. Coudé-feed stellar spectral library - atmospheric parameters Astronomy and Astrophysics 525 A71 January 2011 10.1051/0004-6361/201015014 2011A&A...525A..71W . 1009.1491 53480665 Renson P. Manfroid J. Catalogue of Ap, HgMn and Am stars Astronomy and Astrophysics . 498 3 961–966 May 2009 10.1051/0004-6361/200810788 2009A&A...498..961R free https://zenodo.org/record/890529 On the possible variability of the main sequence A stars theta Virginis and 109 Virginis Adelman Saul J. . Astronomy and Astrophysics Supplement Series 125 497–499 November 1997 3 10.1051/aas:1997105 1997A&AS..125..497A free Cowley A. Cowley C. Jaschek M. Jaschek C. A study of the bright A stars. I. A catalogue of spectral classifications 1 Astronomical Journal 74 375–406 April 1969 10.1086/110819 1969AJ.....74..375C . Abt Helmut A. Morrell Nidia I. The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars Astrophysical Journal Supplement 99 135 1995 . 1995ApJS...99..135A 10.1086/192182 free IAU Catalog of Star Names https://exopla.net/star-names/modern-iau-star-names/ 20 April 2026 Category:A0V stars Category:Virgo (constellation) BD+02 2862 Virginis, 109 130109 072220 5511 Maenalus