{{Short description|Star in the constellation Taurus}} {{other stars by Bayer designation|A Tauri}} {{Starbox begin}} {{Starbox image | image = {{Location mark |image=Taurus constellation map.svg|alt=|float=center|width=280 |label=|position=right |mark=Red circle.svg|mark_width=10|mark_link=37 Tauri |x=700|y=385 }} | caption = Location of 37 Tauri (circled in red) }} {{Starbox observe | epoch = J2000 | constell = Taurus | ra = {{RA|04|04|41.71484}}<ref name=vanLeeuwen2007/> | dec = {{DEC|+22|04|54.9243}}<ref name=vanLeeuwen2007/> | appmag_v = 4.36<ref name=Anderson2012/> }} {{Starbox character | class = K0&nbsp;III-IIIb<ref name=perkins1989/> | b-v = 1.07<ref name=Luck2015/> | u-b = 0.95<ref name=ducati2002/> | r-i = 0.53<ref name=ducati2002/> | variable = }} {{Starbox astrometry | radial_v = {{Val|+9.52|0.11}}<ref name=Massarotti2008/> | prop_mo_ra = +90.53<ref name=vanLeeuwen2007/> | prop_mo_dec = −59.47<ref name=vanLeeuwen2007/> | parallax = 17.43 | p_error = 0.21 | parallax_footnote = <ref name=vanLeeuwen2007/> | absmag_v = 0.57<ref name=Anderson2012/> }} {{Starbox detail | source = | mass = 1.99<ref name=Luck2015/> | radius = {{Val|10.15|0.69}}<ref name=Piau2010/> | luminosity = {{Val|60|6}}<ref name=Piau2010/> | gravity = 2.77<ref name=Piau2010/> | temperature = {{Val|4732|26|fmt=commas}}<ref name=Luck2015/> | metal_fe = +0.01<ref name=Piau2010/> | rotational_velocity = 2.8<ref name=Massarotti2008/> | age_gyr = 1.39<ref name=Luck2015/> }} {{Starbox catalog | names = {{odlist | F=37 Tau | BD=+21°585 | FK5=1112 | HD=25604 | HIP=19038 | HR=1256 | SAO=76430 | WDS=J04047+2205A }}<ref name=SIMBAD/> }} {{Starbox reference | Simbad = 37+Tau }} {{Starbox end}}

'''37 Tauri''' is a single,<ref name=Eggleton2008/> orange-hued star in the zodiac constellation of Taurus. It can be seen with the naked eye, having an apparent visual magnitude of 4.36.<ref name=Anderson2012/> A magnitude 10.01 visual companion has an angular separation of {{Val|134.30|ul=arcsecond}} on a position angle of 138.6°, as of 2003.<ref name=WDSC2014/> Based on an annual parallax shift of {{Val|17.43|0.21|ul=mas}},<ref name=vanLeeuwen2007/> 37 Tauri is about 187&nbsp;light years away. It is moving further from the Sun with a heliocentric radial velocity of 9.5&nbsp;km/s.<ref name=Massarotti2008/>

This is an evolved K-type giant star with a stellar classification of K0&nbsp;III-IIIb.<ref name=perkins1989/> At the age of 1.39<ref name=Luck2015/> billion years, it has become a red clump giant, indicating that it is generating energy through helium fusion at its core.<ref name=Puzeras2010/> The star has around double the mass of the Sun and has expanded to 10<ref name=Piau2010/> times the Sun's radius. It is radiating roughly 60<ref name=Piau2010/> times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,732&nbsp;K.<ref name=Luck2015/>

==Chinese astronomy== In Chinese astronomy, 37 Tauri is called 月, Pinyin: Yuè, meaning ''Moon'', because this star is marking itself and stand alone in ''Moon'' asterism, Hairy Head mansion (see: Chinese constellation).<ref name="ridpathtaurus">[http://www.ianridpath.com/startales/taurus2.htm#chinese Ian Ridpath's Star Tales - Taurus the Bull]</ref>

==References== <references> <ref name=SIMBAD>{{cite simbad | title=37 Tau | access-date=2018-03-22 }}</ref>

<ref name=vanLeeuwen2007>{{citation | title=Validation of the new Hipparcos reduction | last1=van Leeuwen | first1=F. | postscript=. | journal=Astronomy and Astrophysics | volume=474 | issue=2 | pages=653–664 | year=2007 | arxiv=0708.1752 | bibcode=2007A&A...474..653V | doi=10.1051/0004-6361:20078357 | s2cid=18759600 }}</ref>

<ref name=ducati2002>{{citation | title=VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system | journal=CDS/ADC Collection of Electronic Catalogues | last1=Ducati | first1=J. R. | volume=2237 | date=2002 | postscript=. | bibcode=2002yCat.2237....0D }}</ref>

<ref name=Anderson2012>{{citation | title=XHIP: An extended hipparcos compilation | last1=Anderson | first1=E. | last2=Francis | first2=Ch. | journal=Astronomy Letters | volume=38 | issue=5 | pages=331 | year=2012 | bibcode=2012AstL...38..331A | doi=10.1134/S1063773712050015 | arxiv=1108.4971 | s2cid=119257644 | postscript=. }}</ref>

<ref name=perkins1989>{{citation | title=The Perkins catalog of revised MK types for the cooler stars | journal=Astrophysical Journal Supplement Series | last1=Keenan | first1=Philip C. | last2=McNeil | first2=Raymond C. | volume=71 | pages=245 | year=1989 | postscript=. | bibcode=1989ApJS...71..245K | doi=10.1086/191373 }}</ref>

<ref name=Eggleton2008>{{citation | last1=Eggleton | first1=P. P. | last2=Tokovinin | first2=A. A. | title=A catalogue of multiplicity among bright stellar systems | journal=Monthly Notices of the Royal Astronomical Society | volume=389 | issue=2 | pages=869–879 | date=September 2008 | doi=10.1111/j.1365-2966.2008.13596.x | doi-access=free | bibcode=2008MNRAS.389..869E | postscript=. | arxiv=0806.2878 | s2cid=14878976 }}</ref>

<ref name=Puzeras2010>{{citation | display-authors=1 | last1=Puzeras | first1=E. | last2=Tautvaišienė | first2=G. | last3=Cohen | first3=J. G. | last4=Gray | first4=D. F. | last5=Adelman | first5=S. J. | last6=Ilyin | first6=I. | last7=Chorniy | first7=Y. | title=High-resolution spectroscopic study of red clump stars in the Galaxy: iron-group elements | journal=Monthly Notices of the Royal Astronomical Society | volume=408 | issue=2 | pages=1225–1232 | date=October 2010 | doi=10.1111/j.1365-2966.2010.17195.x | doi-access=free | bibcode=2010MNRAS.408.1225P | postscript=. | arxiv=1006.3857 | s2cid=44228180 }}</ref>

<ref name=Massarotti2008>{{citation | display-authors=1 | postscript=. | last1=Massarotti | first1=Alessandro | last2=Latham | first2=David W. | last3=Stefanik | first3=Robert P. | last4=Fogel | first4=Jeffrey | title=Rotational and Radial Velocities for a Sample of 761 Hipparcos Giants and the Role of Binarity | journal=The Astronomical Journal | volume=135 | issue=1 | pages=209–231 | date=January 2008 | doi=10.1088/0004-6256/135/1/209 | bibcode=2008AJ....135..209M | s2cid=121883397 | doi-access=free }}</ref>

<ref name=Luck2015>{{citation | title=Abundances in the Local Region. I. G and K Giants | last1=Luck | first1=R. Earle | journal=Astronomical Journal | postscript=. | volume=150 | issue=3 | at=88 | year=2015 | bibcode=2015AJ....150...88L | doi=10.1088/0004-6256/150/3/88 |arxiv = 1507.01466 | s2cid=118505114 }}</ref>

<ref name=Piau2010>{{citation | display-authors=1 | last1=Piau | first1=L. | last2=Kervella | first2=P. | last3=Dib | first3=S. | last4=Hauschildt | first4=P. | title=Surface convection and red-giants radii measurements | journal=Astronomy and Astrophysics | volume=526 | id=A100 | pages=12 | year=2010 | arxiv=1010.3649 | bibcode=2011A&A...526A.100P | doi=10.1051/0004-6361/201014442 | s2cid=118533297 | postscript=. }}</ref>

<ref name=WDSC2014>{{citation | display-authors=1 | last1=Mason | first1=B. D. | last2=Wycoff | first2=G. L. | last3=Hartkopf | first3=W. I. | last4=Douglass | first4=G. G. | last5=Worley | first5=C. E. | title=The Washington Visual Double Star Catalog | journal=The Astronomical Journal | year=2014 | volume=122 | issue=6 | page=3466 | bibcode=2001AJ....122.3466M | doi=10.1086/323920 | doi-access=free }}</ref> </references>

{{Stars of Taurus}}

Category:K-type giants Category:Horizontal-branch stars Category:Taurus (constellation) Tauri, A1 BD+21 0585 Tauri, 037 025604 019038 1256