71 Tauri

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Star in the constellation Taurus

title: "71 Tauri" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["f-type-main-sequence-stars", "delta-scuti-variables", "triple-star-systems", "taurus-(constellation)", "objects-with-variable-star-designations", "durchmusterung-objects", "flamsteed-objects", "henry-draper-catalogue-objects", "hipparcos-objects", "bright-star-catalogue-objects", "hyades-(star-cluster)"] description: "Star in the constellation Taurus" topic_path: "science/astronomy" source: "https://en.wikipedia.org/wiki/71_Tauri" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Star in the constellation Taurus ::

| image = |image=Taurus constellation map.svg|alt=|float=center|width=280 |label=|position=right |mark=Red circle.svg|mark_width=8|mark_link=71 Tauri |x=565|y=568 | caption = Location of 71 Tauri (circled in red) | epoch = J2000.0 | constell = Taurus | ra = | dec = | appmag_v = +4.48 | class = F0 V | b-v = +0.25 | u-b = +0.13 | variable = δ Sct | radial_v = +38.3 | prop_mo_ra = +85.393 | prop_mo_dec = −14.869 | parallax = 22.4141 | p_error = 0.4969 | parallax_footnote = | absmag_v = 1.10 | mass = 1.94 | radius = 3.34 | luminosity = | gravity = 3.73 | temperature = 7,543 | metal_fe = | rotation = 14.2 d | rotational_velocity = 192 | age_myr = 966 | names = | Simbad=71+Tau

71 Tauri is a suspected triple star system in the zodiac constellation Taurus, located 146 light years from the Sun. It is visible to the naked eye as a faint, yellow-white hued star with an apparent visual magnitude of +4.48. The star is moving further away from the Earth with a heliocentric radial velocity of +38 km/s. It is a member of the Hyades open cluster.

::figure[src="https://upload.wikimedia.org/wikipedia/commons/c/cb/V777TauLightCurve.png" caption="TESS]]'' data"] ::

The primary component is an F-type main-sequence star with a stellar classification of F0 V. In 1979, Stephen Horan discovered that 71 Tauri is a variable star. It was given its variable star designation, V777 Tauri, in 1981. It is a Delta Scuti variable with an amplitude of 0.02 in magnitude and a frequency of 0.16 d−1. This star has about 1.94 times the mass of the Sun and 3.34 times the Sun's radius. It has a projected rotational velocity of 192 km s−1, for an estimated rotation period of 14.2 days. Extreme ultraviolet flares have been observed coming from this star's hot corona, and it is the second brightest X-ray source in the Hyades.

References

| title=MAST: Barbara A. Mikulski Archive for Space Telescopes | url=https://mast.stsci.edu/portal/Mashup/Clients/Mast/Portal.html | publisher=Space Telescope Science Institute |access-date=8 December 2021}}

| last1=Horan | first1=S. | title=A photometric survey of the Hyades for delta Scuti variables | journal=Astronomical Journal | date=November 1979 | volume=84 | pages=1770-1774 | doi=10.1086/112607 | bibcode=1979AJ.....84.1770H | url=https://articles.adsabs.harvard.edu/pdf/1979AJ.....84.1770H | access-date=3 September 2025}}

| last1=Kholopov | first1=P. N. | last2=Samus | first2=N. N. | last3=Kukarkina | first3=N. P. | last4=Medvedeva | first4=G. I. | last5=Perova | first5=N. B. | title=65th Name-List of Variable Stars | journal=Information Bulletin on Variable Stars | date=February 1981 | volume=1921 | pages=1-21 | bibcode=1981IBVS.1921....1K | url=https://ibvs.konkoly.hu/pub/ibvs/1901/1921.pdf | access-date=3 September 2025}}

| last1=Pizzolato | first1=N. | last2=Maggio | first2=A. | last3=Sciortino | first3=S. | title=Evolution of X-ray activity of 1-3 Msun late-type stars in early post-main-sequence phases | journal=Astronomy and Astrophysics | volume=361 | pages=614–628 | date=September 2000 | bibcode=2000A&A...361..614P | postscript=. }}

| title=Extreme-Ultraviolet Flares in an F2 Star | last1=Mullan | first1=D. J. | last2=Mathioudakis | first2=M. | journal=The Astrophysical Journal | volume=544 | issue=1 | pages=475–480 | date=November 2000 | doi=10.1086/317202 | bibcode=2000ApJ...544..475M | postscript=. | doi-access=free }}

| title=71 Tau -- Variable Star of delta Sct type | work=SIMBAD Astronomical Database | publisher=Centre de Données astronomiques de Strasbourg | url=http://simbad.u-strasbg.fr/sim-id.pl?protocol=html&Ident=71+tauri | access-date=2007-01-25 }}

| last=Evans | first=D. S. | date=June 20–24, 1966 | editor1-last=Batten | editor1-first=Alan Henry | editor2-last=Heard | editor2-first=John Frederick | title=The Revision of the General Catalogue of Radial Velocities | work=Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30 | volume=30 | page=57 | location=University of Toronto | publisher=International Astronomical Union | bibcode=1967IAUS...30...57E | postscript=. }}

| last1=Mermilliod | first1=J.-C. | title=Compilation of Eggen's UBV data, transformed to UBV (unpublished) | journal=Catalogue of Eggen's UBV Data. SIMBAD | date=1986 | bibcode=1986EgUBV........0M | postscript=. }}

| display-authors=1 | last1=Samus | first1=N. N. | last2=Kazarovets | first2=E. V. | last3=Durlevich | first3=O. V. | last4=Kireeva | first4=N. N. | last5=Pastukhova | first5=E. N. | title=General Catalogue of Variable Stars | version=5.1 | journal=Astronomy Reports | year=2017 | volume=61 | issue=1 | pages=80–88 | doi=10.1134/S1063772917010085 | bibcode=2017ARep...61...80S | s2cid=125853869 | postscript=. }}

| last1=David | first1=Trevor J. | last2=Hillenbrand | first2=Lynne A. | title=The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets | journal=The Astrophysical Journal | volume=804 | issue=2 | pages=146 | year=2015 | bibcode=2015ApJ...804..146D | doi=10.1088/0004-637X/804/2/146 | arxiv=1501.03154 | s2cid=33401607 | postscript=. }}

| 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 | postscript=. | bibcode=2008MNRAS.389..869E | arxiv=0806.2878 | s2cid=14878976 }}

| title=71 Tauri: Hyades Enigma Resolved? | last1=Simon | first1=Theodore | last2=Ayres | first2=Thomas R. | journal=The Astrophysical Journal | postscript=. | volume=539 | issue=1 | pages=325–330 | date=August 2000 | doi=10.1086/309228 | bibcode=2000ApJ...539..325S | doi-access=free }}

References

  1. {{cite DR2. 3312759303911629952

::callout[type=info title="Wikipedia Source"] This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page. ::

f-type-main-sequence-starsdelta-scuti-variablestriple-star-systemstaurus-(constellation)objects-with-variable-star-designationsdurchmusterung-objectsflamsteed-objectshenry-draper-catalogue-objectshipparcos-objectsbright-star-catalogue-objectshyades-(star-cluster)