{{Short description|Star in the constellation Taurus}} {{about-distinguish|i Tauri|ι Tauri|1 Tauri}} {{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=97 Tauri |x=395|y=480 }} | caption = Location of 97 Tauri (circled in red) }} {{Starbox observe | epoch = J2000 | constell = Taurus<ref name=xhip/> | ra = {{RA|04|51|22.46353}}<ref name=GaiaDR3/> | dec = {{DEC|+18|50|23.4859}}<ref name=GaiaDR3/> | appmag_v = 5.09 to 5.13<ref name=GCVS/> }} {{Starbox character | type = main sequence<ref name=GaiaDR3/> | class = A9V<ref name=xhip/> or A7IV-V<ref name=Royer2007/> | b-v = 0.214<ref name=xhip/> | variable = δ Sct<ref name=GCVS/> }} {{Starbox astrometry | radial_v = {{val|+39.1|1.2}}<ref name=SIMBAD/> | prop_mo_ra = +82.319 | prop_mo_dec = −35.743 | pm_footnote = <ref name=GaiaDR3/> | parallax = 26.1221 | p_error = 0.7454 | parallax_footnote = <ref name=GaiaDR3/> | absmag_v = 1.53<ref name=xhip/> }} {{Starbox detail | mass = 1.7<ref name=GaiaDR3/> | radius = 2.6<ref name=GaiaDR3/> | luminosity = 10.7<ref name=GaiaDR3/> | gravity = 3.8<ref name=GaiaDR3/> | temperature = 7543<ref name=GaiaDR3/> | metal_fe = −0.63<ref name=GaiaDR3/> | rotation = | rotational_velocity = 180<ref name=Royer2007/> | age_gyr = 1.02<ref name=GaiaDR3/> }} {{Starbox catalog | names = {{odlist | name=Lembu | B=i Tau | F=97 Tau | V=V480 Tau | BD=+18 743 | HD=30780 | HIP=22565 | HR=1547 | SAO=94164}}<ref name=SIMBAD/> }} {{Starbox reference | Simbad = *+97+Tau }} {{Starbox end}}
'''97 Tauri''', also named '''Lembu''', is a star about {{convert|125|ly|pc|lk=on|abbr=off}} away in the constellation Taurus. With an apparent magnitude of about 5.1, it is faintly visible to the naked eye under good viewing conditions. It is a member of the Hyades star cluster.<ref name=Núñez2022/> Because it is close to the ecliptic, this star can be occulted by the Moon.<ref name=Stecklum1987/>
The stellar classification of 97 Tauri is reported by different sources as A9V<ref name=xhip/> or A7IV-V,<ref name=Royer2007/> indicating an A-type main-sequence star or possibly a subgiant. It is a rapidly rotating star, with a projected rotational velocity of 180 km/s.<ref name=Royer2007/> It is classified as a Delta Scuti variable, and has been given the variable star designation '''V480 Tauri'''.<ref name=GCVS/>
97 Tauri forms an optical double with the faint G-type main-sequence star HD 286053, whose parallax indicates that it is an unrelated background object.<ref>{{cite simbad |title=HD 286053 |access-date=25 May 2026}}</ref>
==Nomenclature== ''97 Tauri'' is the star's Flamsteed designation; it also has the Bayer designation ''i Tauri''. In Chinese astronomy, the asterism Tiāngāo ({{lang|zh|天高}}, Celestial High Terrace) consists of the stars 97 Tauri, ι Tauri, 107 Tauri, and 109 Tauri.{{refn|Stellarium, citing Yi Shitong (1981)<ref name=Yi1981/>}}
In Bali (Indonesia), Lěmbu refers to a constellation (''lintang'') of an ox, corresponding to the Western constellation Taurus, the bull.<ref name=ASE/> The IAU Working Group on Star Names adopted the name Lembu for 97 Tauri on 17 May 2026.<ref name=IAU-CSN/>
==See also== * Tau Tauri, named Gaja from another Balinese constellation in Taurus
==References== <references>
<ref name=SIMBAD>{{cite simbad |title=* i Tau |access-date=25 May 2026}}</ref>
<ref name=GaiaDR3>{{Cite Gaia DR3|3406917219108423808}}</ref>
<ref name=xhip>{{Cite XHIP|22565}}</ref>
<ref name=GCVS>{{cite web |title=V480 Tau |url=https://vizier.cds.unistra.fr/viz-bin/VizieR-S?V*%20V480%20Tau |work=General Catalogue of Variable Stars – VizieR |access-date=25 May 2026}}</ref>
<ref name=IAU-CSN>{{cite web |title=IAU Catalog of Star Names |url=https://exopla.net/star-names/modern-iau-star-names/ |access-date=25 May 2026}}</ref>
<ref name=ASE>{{cite web |last1=Azkarrula |first1=Youla |last2=Hoffmann |first2=Susanne M |title=Lembu |url=https://ase.exopla.net/index.php/Lembu |website=All Skies Encyclopaedia |publisher=IAU Working Group on Star Names |access-date=25 May 2026}}</ref>
<ref name=Yi1981>{{cite book|script-title=zh:中西对照恒星图表|language=zh|trans-title=Atlas Comparing Chinese and Western Star Maps and Catalogues|last=Yi|first=Shitong|date=April 1981|publisher=科学出版社}}</ref>
<ref name=Stecklum1987>{{cite journal |last1=Stecklum |first1=Bringfried |date=July 1987 |title=Photoelectric observations of lunar occultations |journal=The Astronomical Journal |volume=94 |page=201 |doi=10.1086/114464 |bibcode=1987AJ.....94..201S}}</ref>
<ref name=Royer2007>{{cite journal |last=Royer |first=F. |last2=Zorec |first2=J. |last3=Gómez |first3=A. E. |date=February 2007 |title=Rotational velocities of A-type stars: III. Velocity distributions |journal=Astronomy & Astrophysics |volume=463 |issue=2 |pages=671–682 |doi=10.1051/0004-6361:20065224 |doi-access=free |arxiv=astro-ph/0610785 |bibcode=2007A&A...463..671R |issn=0004-6361}}</ref>
<ref name=Núñez2022>{{cite journal |last=Núñez |first=Alejandro |last2=Agüeros |first2=Marcel A. |last3=Covey |first3=Kevin R. |last4=Douglas |first4=Stephanie T. |last5=Drake |first5=Jeremy J. |last6=Rampalli |first6=Rayna |last7=Bowsher |first7=Emily C. |last8=Cargile |first8=Phillip A. |last9=Kraus |first9=Adam L. |last10=Law |first10=Nicholas M. |display-authors=2 |date=May 2022 |title=The Factory and the Beehive. IV. A Comprehensive Study of the Rotation X-Ray Activity Relation in Praesepe and the Hyades |journal=The Astrophysical Journal |volume=931 |issue=1 |pages=45 |doi=10.3847/1538-4357/ac6517 |doi-access=free |arxiv=2205.06461 |bibcode=2022ApJ...931...45N |issn=0004-637X}}</ref>
</references>
{{Taurus (constellation)}}
Category:Taurus (constellation) Category:A-type main-sequence stars Category:Hyades (star cluster) Tauri, i Tauri, 97 Tauri, V480 1547 BD+18 0743 030780 022565 Lembu Category:Delta Scuti variables