5 Tauri

{{Short description|Binary star system in the constellation Taurus}}

{{Starbox begin

| name=5 Tauri

}}

{{Starbox observe

| epoch = J2000

| ra = {{RA|03|30|52.38296}}{{cite DR2|40834388682003328}}

| dec = {{DEC|+12|56|12.0489}}

| appmag_v = +4.14

| constell = Taurus

}}

{{Starbox character

| class = K0-III{{cite journal | bibcode=1989ApJS...71..245K | title=The Perkins catalog of revised MK types for the cooler stars | journal=Astrophysical Journal Supplement Series | volume=71 | pages=245 | last1=Keenan | first1=Philip C. | last2=McNeil | first2=Raymond C. | year=1989 | doi=10.1086/191373 }}

| b-v = +1.09{{cite journal| author1=Mermilliod, J.-C.| title=Compilation of Eggen's UBV data, transformed to UBV (unpublished)| journal=Catalogue of Eggen's UBV Data| date=1986 | bibcode= 1986EgUBV........0M }}

| u-b = +0.95

| variable =

}}

{{Starbox astrometry

| radial_v = {{Val|14.2|0.3}}{{cite journal | title=XHIP: An extended hipparcos compilation | last1=Anderson | first1=E. | last2=Francis | first2=Ch. | journal=Astronomy Letters | arxiv=1108.4971 | volume=38 | issue=5 | pages=331 | year=2012 | bibcode=2012AstL...38..331A | doi=10.1134/S1063773712050015 | s2cid=119257644 }}

| prop_mo_ra = 13.537

| prop_mo_dec = -2.037

| parallax = 6.1081

| p_error = 0.3907

| parallax_footnote =

| absmag_v = −0.96

}}

{{Starbox orbit

| reference=

| primary=5 Tauri A

| name=5 Tauri B

| period_unitless=960 days

| axis_unitless={{Val|4.25|ul=mas}}{{cite journal | title=The Hipparcos and Tycho Catalogues | author=ESA | journal=VizieR On-line Data Catalog | date=1997 | bibcode=1997yCat.1239....0E }}

| inclination=36.95

| node=207.61

| periastron={{Val|2414889.565|5.82|fmt=commas}}

| eccentricity={{Val|0.397|0.016}}

| periarg={{Val|326.32|2.99}}

| k1 = {{Val|8.25|0.15}}

}}

{{Starbox detail

| component1 = 5 Tauri A

| mass = {{val|4.0|0.7}}

| radius = 8.5{{citation | display-authors=1

| last1=Pasinetti Fracassini | first1=L. E. | last2=Pastori | first2=L.

| last3=Covino | first3=S. | last4=Pozzi | first4=A.

| title=Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)

| edition=Third | journal=Astronomy and Astrophysics

| volume=367 | pages=521–524 | date=February 2001

| doi=10.1051/0004-6361:20000451 | bibcode=2001A&A...367..521P

| arxiv=astro-ph/0012289 | s2cid=425754 | postscript=.}}

| luminosity = 329.38

| temperature = 4,644{{cite journal | bibcode=2014AJ....147..137L | doi=10.1088/0004-6256/147/6/137 | title=Parameters and Abundances in Luminous Stars | journal=The Astronomical Journal | volume=147 | issue=6 | pages=137 | year=2014 | last1=Earle Luck | first1=R. | doi-access=free }}

| gravity = 1.97

| metal_fe = 0.05

| rotational_velocity = 10{{cite journal | author=Bernacca, P. L. | author2=Perinotto, M. | title=A catalogue of stellar rotational velocities | journal=Contributi Osservatorio Astronomico di Padova in Asiago | volume=239 | issue=1 | pages=1 | date=1970 | bibcode=1970CoAsi.239....1B }}

| age =

| component2 = 5 Tauri B

| mass2 = {{val|1.13|0.13}}

}}

{{Starbox catalog

| names = {{odlist | B=f Tau | F=5 Tau | FK5=125 | BD=+12°486 | HD=21754 | HIP=16369 | HR=1066 | SAO=93469 | GC=4184 | TYC=656-1725-1 }}{{cite simbad|title=5 Tau|access-date=28 December 2016}}

}}

{{Starbox reference

|Simbad=5+Tau }}

{{Starbox end}}

5 Tauri is a binary star in the zodiac constellation of Taurus, located approximately 530 light years from the Sun. It is visible to the naked eye as a faint orange-hued star with an apparent visual magnitude of +4.14. It is moving further from the Earth with a heliocentric radial velocity of +14 km/s.

This is a spectroscopic binary with a period of 960 days and an eccentricity of about 0.4.{{cite journal

| title=The orbit of the spectroscopic binary 5 Tauri

| last1=Harper | first1=W. E.

| journal=Publications of the Dominion Observatory Ottawa

| volume=3 | pages=145–149 | date=June 1924

| bibcode=1924PDAO....3..145H }} The primary component is a K-type giant with a stellar classification of K0-III. It has four times the mass of the Sun and is radiating 329 times the Sun's luminosity from its photosphere at an effective temperature of 4,644 K.