GL Virginis

{{Short description|Star in the constellation Virgo}}

{{Starbox begin

| name = GL Virginis

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{{Starbox image

| image = 250px

| caption = A near-infrared light curve for GL Virginis, adapted from Díez Alonso et al. (2019)

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{{Starbox observe

| epoch = J2000

| constell = Virgo

| ra = {{RA|12|18|59.3999}}

| dec = {{DEC|+11|07|33.7702}}

| appmag_v = 13.898{{cite simbad|title=V* GL Vir|access-date=25 December 2016}}

}}

{{Starbox character

| class = M5{{citation|arxiv=1912.05549|year=2019|title=A Catalog of M-dwarf Flares with ASAS-SN|doi=10.3847/1538-4357/ab793a |last1=Rodríguez Martínez |first1=Romy |last2=Lopez |first2=Laura A. |last3=Shappee |first3=Benjamin J. |last4=Schmidt |first4=Sarah J. |last5=Jayasinghe |first5=Tharindu |last6=Kochanek |first6=Christopher S. |last7=Auchettl |first7=Katie |last8=Holoien |first8=Thomas W.-S. |journal=The Astrophysical Journal |volume=892 |issue=2 |page=144 |s2cid=209323915 |doi-access=free }}

| b-v = +1.88{{cite journal| author1=Mermilliod, J.-C.|title=Compilation of Eggen's UBV data, transformed to UBV (unpublished)|journal=Catalogue of Eggen's UBV Data|url=http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?1986EgUBV........0M&db_key=AST&nosetcookie=1| date=1986|bibcode= 1986EgUBV........0M }}

| u-b = +1.065

| variable = Flare star

}}

{{Starbox astrometry

| radial_v = 5.82

| prop_mo_ra = {{val|-1269.771|0.056}}

| prop_mo_dec = {{val|203.444|0.033}}

| parallax = 154.6999

| p_error = 0.0445

| parallax_footnote = {{Cite Gaia EDR3|3907283967108054528}}

| absmag_v = 14.72

}}

{{Starbox detail

|mass = 0.12{{cite web|title=The One Hundred Nearest Star Systems|url=http://www.recons.org/TOP100.posted.htm|date=2012|access-date=25 December 2016}}

|radius = 0.16{{cite journal |last1=Reiners |first1=Ansgar |last2=Basri |first2=Gibor |last3=Browning |first3=Matthew |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 |hdl=10871/10302 |s2cid=15833388 |url=https://ore.exeter.ac.uk/repository/bitstream/handle/10871/10302/Evidence%20for%20Magnetic%20Flux%20Saturation%20in%20Rapidly%20Rotating%20M%20Stars.pdf }}

|temperature=3110{{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|page=102|bibcode=2013AJ....145..102L|doi=10.1088/0004-6256/145/4/102|arxiv=1206.5991|s2cid=117144290}}

| gravity = 5.0

| metal_fe = 0.17{{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|page=20|bibcode=2014AJ....147...20N|doi=10.1088/0004-6256/147/1/20|arxiv=1310.1087|s2cid=26818462}}

| rotational_velocity = 17

}}

{{Starbox catalog

| names = GL Vir, G 12-30, GJ 1156, LHS 324, LTT 13440, GCTP 2835.0, LP 494-77, 2MASS J12185939+1107338

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{{Starbox reference

| Simbad = GJ+1156

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{{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. 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 and its radius is 16% of the Sun. It is a fairly rapid rotator: its rotational velocity is least 17 km/s, which implies that it takes less than half a day to complete a rotation on its axis. The star is emitting a frequent flares, with at least five detected by 2019.

The closest known star system to GL Virginis is Gliese 486, 6.4 light-years away.[http://www.stellar-database.com/Scripts/find_neighbors.exe?ID=83500&ly=15 Stars within 15 light-years of Gliese & Jahreiss 1156 (The Internet Stellar Database)]