The name 38 Virginis derives from the star being the 38th star in order of right ascension catalogued in the constellation Virgo by Flamsteed in his star catalogue. The designation b of 38 Virginis b derives from the order of discovery and is given to the first planet orbiting a given star, followed by the other lowercase letters of the alphabet.[4] In the case of 38 Virginis, only one was discovered, which was designated b.[2]
Stellar characteristicsEdit
38 Virginis is an F-type main sequence star that is approximately 118% the mass of and 145% the radius of the Sun. It has a temperature of 6557 K and is about 1.9 billion years old. In comparison, the Sun is about 4.6 billion years old[5] and has a temperature of 5778 K.[6]
The star is metal-rich, with a metallicity ([Fe/H]) of 0.07 dex, or 117% the solar amount. Its luminosity (L☉) is 3.48 times that of the Sun.
A companion star is cataloged in the CCDM at a separation of half an arcsecond.[7]
The star is known to host one exoplanet, 38 Virginis b, discovered in 2016. This planet has a relatively low eccentricity out of any long-period giant exoplanet discovered, with an eccentricity of 0.03. The planet has a mass of around 4.5 times that of the planet Jupiter.[2] Its orbit very likely puts it and any moons it may have in the habitable zone of its star.[citation needed]
NotesEdit
^From , where is the luminosity, is the radius, is the effective surface temperature and is the Stefan–Boltzmann constant.
ReferencesEdit
^ abcdefBrown, 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.
^ abcdefghijkBorgniet, S.; et al. (2017). "Extrasolar planets and brown dwarfs around AF-type stars. IX. The HARPS southern sample". Astronomy and Astrophysics. 599. A57. arXiv:1608.08257. Bibcode:2017A&A...599A..57B. doi:10.1051/0004-6361/201628805. S2CID 118723455.
^Hessman, F. V.; Dhillon, V. S.; Winget, D. E.; Schreiber, M. R.; Horne, K.; Marsh, T. R.; Guenther, E.; Schwope, A.; Heber, U. (2010). "On the naming convention used for multiple star systems and extrasolar planets". arXiv:1012.0707 [astro-ph.SR].
^Fraser Cain (16 September 2008). "How Old is the Sun?". Universe Today. Retrieved 19 February 2011.
^Fraser Cain (15 September 2008). "Temperature of the Sun". Universe Today. Retrieved 19 February 2011.
^J. Dommanget; et al. (February 2002), Catalog of Components of Double & Multiple Stars, Observations et Travaux, Societe Astronomique de France
October 15, 2023
virginis, type, main, sequence, star, constellation, virgo, around, light, years, distant, from, earth, observation, dataepoch, j2000, equinox, j2000, 0constellation, virgoright, ascension, 1564s, declination, 1482, apparent, magnitude, 11characteristicsspectr. 38 Virginis is an F type main sequence star in the constellation of Virgo It is around 108 light years distant from the Earth 2 1 38 Virginis Observation dataEpoch J2000 0 Equinox J2000 0Constellation VirgoRight ascension 12h 53m 11 1564s 1 Declination 03 33 11 1482 1 Apparent magnitude V 6 11CharacteristicsSpectral type F6V 2 B V color index 0 49 2 AstrometryProper motion m RA 262 638 0 113 1 mas yr Dec 3 853 0 100 1 mas yrParallax p 30 0702 0 0541 mas 1 Distance108 5 0 2 ly 33 26 0 06 pc Absolute magnitude MV 6 11DetailsMass1 18 0 12 2 M Radius1 45 0 07 2 R Luminosity3 48 note 1 L Temperature6557 96 2 KMetallicity Fe H 0 07 2 dexAge1 9 0 6 0 7 2 GyrOther designationsBD 02 3593 HD 111998 HIP 62875 HR 4891 WDS J12532 0333AB 3 Database referencesSIMBADdata Contents 1 Nomenclature 2 Stellar characteristics 3 Planetary system 4 Notes 5 ReferencesNomenclature EditThe name 38 Virginis derives from the star being the 38th star in order of right ascension catalogued in the constellation Virgo by Flamsteed in his star catalogue The designation b of 38 Virginis b derives from the order of discovery and is given to the first planet orbiting a given star followed by the other lowercase letters of the alphabet 4 In the case of 38 Virginis only one was discovered which was designated b 2 Stellar characteristics Edit38 Virginis is an F type main sequence star that is approximately 118 the mass of and 145 the radius of the Sun It has a temperature of 6557 K and is about 1 9 billion years old In comparison the Sun is about 4 6 billion years old 5 and has a temperature of 5778 K 6 The star is metal rich with a metallicity Fe H of 0 07 dex or 117 the solar amount Its luminosity L is 3 48 times that of the Sun A companion star is cataloged in the CCDM at a separation of half an arcsecond 7 Planetary system EditThe 38 Virginis planetary system 2 Companion in order from star Mass Semimajor axis AU Orbital period days Eccentricity Inclination Radiusb 4 51 0 5 MJ 1 82 0 07 825 9 6 2 0 03 0 04 4 51 RJThe star is known to host one exoplanet 38 Virginis b discovered in 2016 This planet has a relatively low eccentricity out of any long period giant exoplanet discovered with an eccentricity of 0 03 The planet has a mass of around 4 5 times that of the planet Jupiter 2 Its orbit very likely puts it and any moons it may have in the habitable zone of its star citation needed Notes Edit From L 4 p R 2 s T e f f 4 displaystyle begin smallmatrix L 4 pi R 2 sigma T rm eff 4 end smallmatrix nbsp where L displaystyle begin smallmatrix L end smallmatrix nbsp is the luminosity R displaystyle begin smallmatrix R end smallmatrix nbsp is the radius T e f f displaystyle begin smallmatrix T rm eff end smallmatrix nbsp is the effective surface temperature and s displaystyle begin smallmatrix sigma end smallmatrix nbsp is the Stefan Boltzmann constant References Edit a b c d e f Brown A G A et al Gaia collaboration August 2018 Gaia Data Release 2 Summary of the contents and survey properties Astronomy amp Astrophysics 616 A1 arXiv 1804 09365 Bibcode 2018A amp A 616A 1G doi 10 1051 0004 6361 201833051 Gaia DR2 record for this source at VizieR a b c d e f g h i j k Borgniet S et al 2017 Extrasolar planets and brown dwarfs around AF type stars IX The HARPS southern sample Astronomy and Astrophysics 599 A57 arXiv 1608 08257 Bibcode 2017A amp A 599A 57B doi 10 1051 0004 6361 201628805 S2CID 118723455 38 Virginis SIMBAD Centre de donnees astronomiques de Strasbourg Retrieved 2018 10 19 Hessman F V Dhillon V S Winget D E Schreiber M R Horne K Marsh T R Guenther E Schwope A Heber U 2010 On the naming convention used for multiple star systems and extrasolar planets arXiv 1012 0707 astro ph SR Fraser Cain 16 September 2008 How Old is the Sun Universe Today Retrieved 19 February 2011 Fraser Cain 15 September 2008 Temperature of the Sun Universe Today Retrieved 19 February 2011 J Dommanget et al February 2002 Catalog of Components of Double amp Multiple Stars Observations et Travaux Societe Astronomique de France Retrieved from https en wikipedia org w index php title 38 Virginis amp oldid 1079517326, wikipedia, wiki, book, books, library,
