{{Short description|G-type star in the constellation Taurus}} {{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=104 Tauri |x=292|y=480 }} | caption = Location of 104 Tauri (circled in red) }} {{Starbox observe | epoch = J2000 | constell = Taurus | ra = {{RA|05|07|27.00529}}<ref name="vanLeeuwen2007"/> | dec = {{DEC|+18|38|42.1815}}<ref name="vanLeeuwen2007"/> | appmag_v = 4.92<ref name="apj764_1_78"/> }} {{Starbox character | type = subgiant<ref name=dr3/> | class = G4V<ref name=aj133_6_2524/> | b-v = 0.64<ref name=aj133_6_2524/> | u-b = | variable = }} {{Starbox astrometry | radial_v = +20.19<ref name=aj133_6_2524/> | prop_mo_ra = +534.73<ref name="vanLeeuwen2007"/> | prop_mo_dec = +17.93<ref name="vanLeeuwen2007"/> | parallax = 64.79 | p_error = 0.33 | parallax_footnote = <ref name="vanLeeuwen2007"/> | absmag_v = {{Val|3.75|0.06}}<ref name=bernkopf2006/> }} {{Starbox detail | mass = {{Val|1.00|0.03|0.04}}<ref name=bernkopf2006/> | radius = {{Val|1.63|0.06}}<ref name=bernkopf2006/> | gravity = 4.06<ref name="apj764_1_78"/> | metal_fe = −0.22<ref name="apj764_1_78"/> | temperature = 5,717<ref name="apj764_1_78"/> | luminosity = 2.41<ref name=Anderson2012/> | habitable_inner = 1.17<ref name=Painter2025/> AU | habitable_outer = 2.76<ref name=Painter2025/> AU | rotational_velocity = 10.00<ref name=aj133_6_2524/> | rotation = | age_gyr = 10.15<ref name="apj764_1_78"/> }} {{Starbox catalog | names = {{odlist |B=m Tau |F=104 Tau |BD=+18°779 |GJ=188 |HD=32923 |HIP=23835 |HR=1656 |SAO=94332 }}<ref name="SIMBAD"/> }} {{Starbox reference |Simbad=104+Tau }} {{Starbox end}} '''104 Tauri''' ('''104 Tau''') is the Flamsteed designation for a star in the equatorial constellation of Taurus. It has an apparent magnitude of 4.92, which is bright enough to be seen with the naked eye. Based upon parallax measurements, this star is located about 50 light-years from the Sun.<ref name="vanLeeuwen2007"/> It is moving further from the Sun with a heliocentric radial velocity of +20&nbsp;km/s.<ref name=aj133_6_2524/>

This star has a stellar classification of G4&nbsp;V,<ref name=aj133_6_2524/> which suggests it is an ordinary G-type main-sequence star that is generating energy through hydrogen fusion at its stellar core. It is an estimated 10<ref name="apj764_1_78"/>&nbsp;billion years old and is spinning with a projected rotational velocity of 10&nbsp;km/s.<ref name=aj133_6_2524/> The star has about the same mass as the Sun, with 1.6 times the Sun's radius.<ref name=bernkopf2006/> It is radiating 2.4<ref name=Anderson2012/> times the Sun's luminosity from its photosphere at an effective temperature of {{val|5717|ul=K|fmt=commas}}.<ref name="apj764_1_78"/>

104 Tauri appears to have a modest barium enrichment compared to iron. This may indicate that the star had accreted stellar wind of a companion star in the asymptotic giant branch, which has since evolved into a white dwarf.<ref name="2017MNRAS.471.3768F"/>

The star displays convincing evidence for an infrared excess, suggesting the presence of a circumstellar debris disk of dust.<ref name=holmes2003/> It also presents a statistically significant difference on proper motion measurements taken by the Hipparcos and Gaia spacecrafts, suggesting the presence of an orbiting exoplanet.<ref name=Painter2025/>

On 24 July 2028, it will be occulted by Venus over Japan, East Siberia and the Pacific Ocean.<ref name="Mus2002">{{cite book |date=2002 |first=Jan |last=Meeus |chapter=Mutual occultations of planets |pages=174–185 |title=More Mathematical Astronomy Morsels |isbn=0943396743 |url=https://falakmu.id/khgt/dokumen/More%20mathematical%20astronomy%20morsels%20(Jean%20Meeus)%20(Z-Library).pdf |archive-date=2025-04-05 |access-date=2025-02-21 |archive-url=https://web.archive.org/web/20250405185720/https://falakmu.id/khgt/dokumen/More%20mathematical%20astronomy%20morsels%20%28Jean%20Meeus%29%20%28Z-Library%29.pdf |url-status=dead }}</ref>{{rp|165}}

==References== {{Reflist|refs=

<ref name=dr3>{{cite Gaia DR3|3407611182744289152}}</ref>

<ref name="vanLeeuwen2007">{{citation | first=F. | last=van Leeuwen | title=Validation of the new Hipparcos reduction | journal=Astronomy and Astrophysics | volume=474 | issue=2 | pages=653–664 |date=November 2007 | bibcode=2007A&A...474..653V | doi=10.1051/0004-6361:20078357 | arxiv=0708.1752 | s2cid=18759600 | postscript=. }}</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=aj133_6_2524>{{citation | display-authors=1 | last1=White | first1=Russel J. | last2=Gabor | first2=Jared M. | last3=Hillenbrand | first3=Lynne A. | title=High-Dispersion Optical Spectra of Nearby Stars Younger Than the Sun | journal=The Astronomical Journal | volume=133 | issue=6 | pages=2524–2536 | date=June 2007 | doi=10.1086/514336 | bibcode=2007AJ....133.2524W | arxiv=0706.0542 | s2cid=122854 | postscript=. }}</ref>

<ref name="apj764_1_78">{{citation | display-authors=1 | last1=Ramírez | first1=I. | last2=Allende Prieto | first2=C. | last3=Lambert | first3=D. L. | title=Oxygen abundances in nearby FGK stars and the galactic chemical evolution of the local disk and halo | journal=The Astrophysical Journal | volume=764 | issue=1 | page=78 | date=February 2013 | doi=10.1088/0004-637X/764/1/78 | bibcode=2013ApJ...764...78R | arxiv=1301.1582 | s2cid=118751608 | postscript=. }}</ref>

<ref name=holmes2003>{{citation | display-authors=1 | last1=Holmes | first1=E. K. | last2=Butner | first2=H. M. | last3=Fajardo-Acosta | first3=S. B. | last4=Rebull | first4=L. M. | title=A Survey of Nearby Main-Sequence Stars for Submillimeter Emission | journal=The Astronomical Journal | volume=125 | issue=6 | pages=3334–3343 | date=June 2003 | doi=10.1086/375202 | bibcode=2003AJ....125.3334H | postscript=. |doi-access=free}}</ref>

<ref name=Painter2025>{{Citation |last=Painter |first=Katie E. |last2=Bowler |first2=Brendan P. |last3=Franson |first3=Kyle |last4=Becker |first4=Juliette C. |last5=Burt |first5=Jennifer A. |title=Astrometric Accelerations of Provisional Targets for the Habitable Worlds Observatory |date=2025-06-26 |arxiv=2506.21768 |journal=The Astronomical Journal |postscript=.}}</ref>

<ref name=bernkopf2006>{{citation | last1=Bernkopf | first1=Jan | last2=Fuhrmann | first2=Klaus | title=Local subgiants and time-scales of disc formation | journal=Monthly Notices of the Royal Astronomical Society | volume=369 | issue=2 | pages=673–676 | date=June 2006 | doi=10.1111/j.1365-2966.2006.10326.x | bibcode=2006MNRAS.369..673B | postscript=. | doi-access=free }}</ref>

<ref name="SIMBAD">{{citation | title=m Tau -- Double or multiple star | work=SIMBAD Astronomical Database | publisher=Centre de Données astronomiques de Strasbourg | url=https://simbad.u-strasbg.fr/simbad/sim-id?Ident=104+Tauri | accessdate=2013-08-12 | postscript=. }}</ref>

<ref name="2017MNRAS.471.3768F"> {{cite journal | last1=Fuhrmann | first1=K. | last2=Chini | first2=R. | last3=Kaderhandt | first3=L. | last4=Chen | first4=Z. | last5=Lachaume | first5=R. | title=The barium-to-iron enrichment versus age relation of ancient disc stars | journal=Monthly Notices of the Royal Astronomical Society | publisher=Oxford University Press (OUP) | volume=471 | issue=3 | pages=3768–3774 | date=2017-07-21 | bibcode=2017MNRAS.471.3768F | doi=10.1093/mnras/stx1848 | doi-access=free | issn=0035-8711 }}</ref>

}}

{{Stars of Taurus}}

Category:Taurus (constellation) Category:G-type subgiants Category:Double stars Tauri, 104 Tauri, m 0188 032923 23835 1656 BD+18 0779