| 词条 | GL Virginis |
| 释义 |
| name = GL Virginis }}{{Starbox observe | epoch = J2000 | constell = Virgo | ra = {{RA|12|18|59.3999}} | dec = {{DEC|+11|07|33.7702}} | appmag_v = 13.898[3] }}{{Starbox character | class = M4.5Ve[1] | b-v = +1.88[2] | u-b = +1.065[2] | variable = Flare star }}{{Starbox astrometry | radial_v = 5.82[1] | prop_mo_ra = {{val|−1269.932|0.192}} | prop_mo_dec = {{val|203.617|0.117}} | parallax = 154.5077 | p_error = 0.1108 | parallax_footnote = | absmag_v = 14.72[11] }}{{Starbox detail |mass = 0.12[3] |radius = 0.16[4] |temperature=3110[5] | gravity = 5.0[5] | metal_fe = 0.17[6] | rotational_velocity = 17[4] }}{{Starbox catalog | names = GL Vir, G 12-30, GJ 1156, LHS 324, LTT 13440, GCTP 2835.0, LP 494-77, 2MASS J12185939+1107338[1] }}{{Starbox reference | Simbad = GJ+1156 }}{{Starbox end}} GL Virginis, also known as G 12-30, is a star in the constellation of Virgo. It is a faint red dwarf, like more than 70% of the stars located within 10 parsecs of the Solar System; its magnitude visual magnitude is 13.898, making it impossible to see with the naked eye. Located 21.1 light years away, GL Virginis has a spectral type of M4.5V and an effective temperature of approximately 3110 K.[5] Its luminosity (emitted in the visible section of the electromagnetic spectrum is only one ten-thousandth compared to the Sun; however, since a significant fraction of its radiation is emitted as invisible infrared light, its bolometric luminosity increases to 0.5% of that of the Sun. Its mass is 12% that of the Sun[3] and its radius is 16% of the Sun.[4] It is a fairly rapid rotator: its rotational velocity is least 17 km/s,[4] which implies that it takes less than half a day to complete a rotation on its axis. The closest known star system to GL Virginis is Gliese 486, 6.4 light-years away.[7] References1. ^1 2 3 {{cite simbad|title=V* GL Vir|access-date=25 December 2016}} 2. ^1 {{cite journal| author1=Mermilliod, J.-C.|title=Compilation of Eggen's UBV data, transformed to UBV (unpublished)|url=http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?1986EgUBV........0M&db_key=AST&nosetcookie=1| date=1986|bibcode= 1986EgUBV........0M }} 3. ^1 2 {{cite web|title=The One Hundred Nearest Star Systems|url=http://www.recons.org/TOP100.posted.htm|date=2012|accessdate=25 December 2016}} 4. ^1 2 3 {{cite journal|display-authors=1|author1=Reiners, A. | author2=Basri, G.|author3=Browning, M.|title=Evidence for Magnetic Flux Saturation in Rapidly Rotating M Stars|journal=The Astrophysical Journal|volume=692|issue=1| pages=538–545|date=2009|bibcode=2009ApJ...692..538R|doi=10.1088/0004-637X/692/1/538 | arxiv=0810.5139}} 5. ^1 2 {{cite journal|title=A Spectroscopic Catalog of the Brightest (J < 9) M Dwarfs in the Northern Sky|author1=Lépine, Sébastien|date=2013|journal=The Astronomical Journal|volume=145|issue=4|bibcode=2013AJ....145..102L|doi=10.1088/0004-6256/145/4/102|arxiv=1206.5991}} 6. ^{{cite journal|title=Near-infrared Metallicities, Radial Velocities, and Spectral Types for 447 Nearby M Dwarfs|author1=Newton, Elisabeth R.|date=2014|journal=The Astronomical Journal|volume=147|issue=1|bibcode=2014AJ....147...20N|doi=10.1088/0004-6256/147/1/20|arxiv=1310.1087}} 7. ^Stars within 15 light-years of Gliese & Jahreiss 1156 (The Internet Stellar Database) }}{{Virgo}}{{reddwarf-star-stub}} 5 : Virgo (constellation)|M-type main-sequence stars|Gliese and GJ objects|Objects with variable star designations|2MASS objects |
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