47 Tauri

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

{{Starbox begin|title=47 Tauri}}

{{Starbox observe

|epoch=J2000

|constell=Taurus

|ra={{RA|04|13|56.38482}}{{cite journal|title=Validation of the new Hipparcos reduction|author=van Leeuwen, F.|display-authors=etal|journal=Astronomy and Astrophysics|volume=474|issue=2|pages=653–664|date=2007|arxiv=0708.1752|bibcode=2007A&A...474..653V|doi=10.1051/0004-6361:20078357|s2cid = 18759600}}

|dec={{DEC|+09|15|49.7729}}

|appmag_v=4.89{{cite simbad|title=* 47 Tau|access-date=2 May 2017}}
(5.05 + 7.32)

}}

{{Starbox character

|class=G5III + A7V:{{cite journal|bibcode=1969AJ.....74..689S|doi=10.1086/110845|title=The masses of stars above the main sequence|journal=The Astronomical Journal|volume=74|pages=689|year=1969|last1=Stephenson|first1=C. B.|last2=Sanwal|first2=N. B.|doi-access=free}}

|b-v=+0.82{{cite journal|author1=Mermilliod, J.-C.|title=Compilation of Eggen's UBV data, transformed to UBV (unpublished)|journal=Catalogue of Eggen's UBV Data|date=1986|bibcode= 1986EgUBV........0M}}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=+0.46

}}

{{Starbox astrometry

|radial_v=-8.2 ± 0.4{{cite journal|bibcode=2011ApJ...736...87K|doi=10.1088/0004-637X/736/2/87|arxiv=1105.3083|title=Abundances of Refractory Elements for G-Type Stars with Extrasolar Planets|journal=The Astrophysical Journal|volume=736|issue=2|pages=87|year=2011|last1=Kang|first1=Wonseok|last2=Lee|first2=Sang-Gak|last3=Kim|first3=Kang-Min|s2cid=118382154}}

|prop_mo_ra=-10.31

|prop_mo_dec=-30.01

|parallax=9.83

|p_error=0.64

|parallax_footnote=

}}

{{Starbox orbit

|reference={{cite web|url=http://www.usno.navy.mil/USNO/astrometry/optical-IR-prod/wds/orb6|title=Sixth Catalog of Orbits of Visual Binary Stars|work=United States Naval Observatory|access-date=2 May 2017|archive-date=1 August 2017|archive-url=https://web.archive.org/web/20170801102553/http://www.usno.navy.mil/USNO/astrometry/optical-IR-prod/wds/orb6|url-status=dead}}

|period=479

|axis=1.053

|inclination=128.6

|node=52.9

|periastron=B 1816.6

|eccentricity=0.910

|periarg=263.0

|k1=

}}

{{Starbox detail

|component1=47 Tau A

|mass=

|radius=12.9{{cite journal|display-authors=1|author1=Pasinetti Fracassini, L. E.|author2=Pastori, L.|author3=Covino, S.|author4=Pozzi, A.|title=Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics|journal=Astronomy & Astrophysics|volume=367|issue=2|pages=521–24|date=2001|bibcode=2001A&A...367..521P|doi=10.1051/0004-6361:20000451|arxiv=astro-ph/0012289|s2cid=425754}}

|temperature=5117 ± 58

|luminosity=

|gravity=2.67 ± 0.11

|metal_fe=-0.10 ± 0.08

|rotational_velocity=

|age_gyr=

}}

{{Starbox catalog

|names={{odlist|BD=+08°652|HD=26722|HIP=19740|HR=1311|SAO=111674}}

}}

{{Starbox reference

|Simbad=47+Tau|sn=47 Tau

|Simbad2=47+Tau+A|sn2=47 Tau A

|Simbad3=47+Tau+B|sn3=47 Tau B

}}

{{Starbox end}}

47 Tauri (abbreviated to 47 Tau) is a binary star in the zodiac constellation of Taurus. Parallax measurements made by the Hipparcos spacecraft put it at a distance of about 330 light-years (102 parsecs) from Earth. The system has a combined apparent magnitude of about 4.89, meaning it can be faintly seen with the naked eye, according to the Bortle scale.

47 Tauri is a visual binary, meaning that the two components can be resolved, and the orbit is derived from the positions of the two stars. The primary component is a G-type giant. Its radius is about 13 times that of the Sun. The companion is likely a white-colored A-type main-sequence star that is fainter. The two stars are separated about 1.3 arcseconds away, and because of their large separation, the two stars take some 479 years to complete an orbit.