tau Tauri

{{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=Tau Tauri

|x=457|y=363

}}

| caption = Location of τ Tauri (circled)

}}

{{Starbox observe

| epoch = J2000

| constell = Taurus

| ra = {{RA|04|42|14.70161}}

| dec = {{DEC|22|57|24.9214}}

| appmag_v = 4.27

}}

{{Starbox character

| type =

| class = B3V + ? + A0V–A2V + A1V

| b-v = -0.14

| u-b = -0.57

| variable =

}}

{{Starbox astrometry

| radial_v = +14.60

| prop_mo_ra = -2.89

| prop_mo_dec = -21.86

| parallax = 8.19

| p_error = 0.88

| parallax_footnote =

| absmag_v = -1.15

}}

{{Starbox orbit

| reference =

| primary = Aa

| period_unitless = {{Val|2.956549|0.000002|u=days}}

| axis =

| axis_unitless = ≤ {{Convert|2176000|km|AU|disp=out}}

| eccentricity = {{Val|0.051|0.019}}

| periastron = {{Val|2436424.207|0.009|ul=JD|fmt=commas}}

| periarg = {{Val|126.7|21.8}}

| k1 = {{Val|53.6|1.0}}

}}

{{Starbox detail

| component1 = Aa

| mass = 6.4

| radius =

| gravity = 2.60

| metal_fe = -0.51

| age_gyr =

| temperature = 18,700

| luminosity = 1,472

| rotational_velocity = 115

}}

{{Starbox catalog

| names = {{odlist | B=τ Tau | F=94 Tauri | BD=+22°739 | FK5=174 | HD=29763 | HIP=21881 | HR=1497 | SAO=76721 | GC=5716 | CCDM=J04422+2257AB | GSC=01830-02129 | WDS=J04422+2257A }}

}}

{{Starbox reference

| Simbad = tau+Tau

}}

Tau Tauri, Latinized from τ Tauri, is a quadruple star system in the constellation Taurus. It is visible to the naked eye as a faint point of light with a combined apparent visual magnitude of 4.33. The distance to this system is approximately about 400 light years based on parallax. The system is moving further from the Earth with a heliocentric radial velocity of +14.6 km/s, and it is a member of the Taurion OB association, located between Orion and Taurus. It is located 0.7 degree north of the ecliptic, and thus is subject to lunar occultations.

The blue-white hued primary, component Aa, is a B-type main-sequence star with a stellar classification of B3V. It was found to be a close spectroscopic binary in 1903 by American astronomers Edwin B. Frost and Walter S. Adams. The pair have an orbital period of 2.96 days and eccentricity of 0.05. A second companion, white-hued component Ab, has magnitude 6.97 and angular separation 0.2" from the primary in a 58-year orbit. This is a probably A-type main-sequence star with a class of A0V–A2V. The more distant component B is a type A1V star with magnitude 7.2 and separation 62.8".

References

{{reflist|refs=

{{cite simbad | title=tau Tau | access-date=2016-10-18 | postscript=. }}

{{cite journal

| title=The spectroscopic binary Boss 1107

| last1=Petrie | first1=R. M. | last2=Ebbighausen | first2=E. G.

| journal=Publications of the Dominion Astrophysical Observatory Victoria

| volume=11 | pages=385–394 | date=1961

| bibcode=1961PDAO...11..385P }}

{{cite journal

| title=Cosmography of OB stars in the solar neighbourhood

| last1=Bouy | first1=H. | last2=Alves | first2=J.

| journal=Astronomy & Astrophysics

| volume=584 | id=A26 | pages=13 | date=December 2015

| doi=10.1051/0004-6361/201527058

| bibcode=2015A&A...584A..26B | doi-access=free }}

{{cite journal

| title=New binary stars discovered by lunar occultations

| display-authors=1 | last1=Richichi | first1=A.

| last2=Calamai | first2=G. | last3=Leinert | first3=C.

| journal=Astronomy and Astrophysics

| volume=286 | pages=829–837 | date=June 1994

| bibcode=1994A&A...286..829R }}

{{cite journal

| title=Validation of the new Hipparcos reduction

| last1=Van Leeuwen | first1=F.

| 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 }} [http://vizier.u-strasbg.fr/viz-bin/VizieR-S?HIP%2021881 Vizier catalog entry]

{{cite journal | bibcode=2012AstL...38..331A | doi=10.1134/S1063773712050015 | arxiv=1108.4971 | title=XHIP: An extended hipparcos compilation | journal=Astronomy Letters | volume=38 | issue=5 | pages=331 | year=2012 | last1=Anderson | first1=E. | last2=Francis | first2=Ch. | s2cid=119257644 }} [http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=V/137D/XHIP&HIP=21881 Vizier catalog entry]

{{cite journal | bibcode=1995yCat.5050....0H | title=VizieR Online Data Catalog: Bright Star Catalogue, 5th Revised Ed. (Hoffleit+, 1991) | journal=VizieR On-line Data Catalog: V/50. Originally Published in: 1964BS....C......0H | volume=5050 | last1=Hoffleit | first1=D. | last2=Warren | first2=W. H. | year=1995 }}

{{cite journal | bibcode=2014JAVSO..42..443M | title=Sloan Magnitudes for the Brightest Stars | journal=The Journal of the American Association of Variable Star Observers | volume=42 | pages=443 | last1=Mallama | first1=A. | year=2014 | issue=2 }}[http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=J/other/JAVSO/42.443/ugriz&HD=029763 Vizier catalog entry]

{{cite journal | last=Wilson | first=R. E. | year=1953 | title=General Catalogue of Stellar Radial Velocities | journal=Carnegie Institute Washington D.C. Publication | publisher=Carnegie Institution for Science | bibcode=1953GCRV..C......0W | isbn=9780598216885 | lccn=54001336 }}

{{cite journal | bibcode=2011MNRAS.410..190T | doi=10.1111/j.1365-2966.2010.17434.x | arxiv=1007.4883 | title=A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun | journal=Monthly Notices of the Royal Astronomical Society | volume=410 | pages=190–200 | year=2011 | last1=Tetzlaff | first1=N. | last2=Neuhäuser | first2=R. | last3=Hohle | first3=M. M. | issue=1 | doi-access=free | s2cid=118629873 }} [http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=J/MNRAS/410/190/table1&HIP=21881 Vizier catalog entry]

{{cite journal | bibcode=2010AN....331..349H | doi=10.1002/asna.200911355 | arxiv=1003.2335 | title=Masses and luminosities of O- and B-type stars and red supergiants | journal=Astronomische Nachrichten | volume=331 | issue=4 | pages=349 | year=2010 | last1=Hohle | first1=M.M. | last2=Neuhäuser | first2=R. | last3=Schutz | first3=B.F. | s2cid=111387483 }} [http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=J/AN/331/349/single&HIP=21881 Vizier catalog entry]

{{cite journal | bibcode=2002ApJ...573..359A | doi=10.1086/340590 | title=Rotational Velocities of B Stars | journal=The Astrophysical Journal | volume=573 | pages=359–365 | year=2002 | last1=Abt | first1=Helmut A. | last2=Levato | first2=Hugo | last3=Grosso | first3=Monica | issue=1 | doi-access=free }}

{{cite journal | bibcode=2011A&A...525A..71W | doi=10.1051/0004-6361/201015014 | arxiv=1009.1491 | title=Coudé-feed stellar spectral library – atmospheric parameters | journal=Astronomy & Astrophysics | volume=525 | pages=A71 | year=2010 | last1=Wu | first1=Yue | last2=Singh | first2=H. P. | last3=Prugniel | first3=P. | last4=Gupta | first4=R. | last5=Koleva | first5=M. | s2cid=53480665 }}

{{cite journal | bibcode=2012A&A...546A..69M | doi=10.1051/0004-6361/201219774 | title=Dynamical masses of a selected sample of orbital binaries | journal=Astronomy & Astrophysics | volume=546 | pages=A69 | year=2012 | last1=Malkov | first1=O. Yu. | last2=Tamazian | first2=V. S. | last3=Docobo | first3=J. A. | last4=Chulkov | first4=D. A. | doi-access=free }} [http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=J/A%2bA/546/A69/table1&WDS=04422%2B2257 Vizier catalog entry]

{{cite journal | bibcode=2008MNRAS.389..869E | doi=10.1111/j.1365-2966.2008.13596.x | arxiv = 0806.2878 | title=A catalogue of multiplicity among bright stellar systems | journal=Monthly Notices of the Royal Astronomical Society | volume=389 | issue=2 | pages=869 | year=2008 | last1=Eggleton | first1=P. P. | last2=Tokovinin | first2=A. A. | doi-access=free | s2cid=14878976 }} [http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=J/MNRAS/389/869/table1&mHR=1497 Vizier catalog entry]

{{cite journal | bibcode=2001AJ....122.3466M | doi=10.1086/323920 | title=The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog | journal=The Astronomical Journal | volume=122 | issue=6 | pages=3466 | year=2001 | last1=Mason | first1=Brian D. | last2=Wycoff | first2=Gary L. | last3=Hartkopf | first3=William I. | last4=Douglass | first4=Geoffrey G. | last5=Worley | first5=Charles E. | doi-access=free }} [http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=B/wds/wds&WDS=04422%2B2257 Vizier catalog entry]

}}

Category:B-type main-sequence stars

Category:A-type main-sequence stars

Category:Spectroscopic binaries

Category:Taurus (constellation)