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This article is about i Tauri; not to be confused with ι Tauri or 1 Tauri.

97 Tauri, also named Lembu, is a star about 125 light-years (38 parsecs) 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.[6] Because it is close to the ecliptic, this star can be occulted by the Moon.[7]

The stellar classification of 97 Tauri is reported by different sources as A9V[1] or A7IV-V,[4] 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.[4] It is classified as a Delta Scuti variable, and has been given the variable star designation V480 Tauri.[3]

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.[8]

Nomenclature

97 Tauri is the star’s Flamsteed designation; it also has the Bayer designation i Tauri. In Chinese astronomy, the asterism Tiāngāo (天高, Celestial High Terrace) consists of the stars 97 Tauri, ι Tauri, 107 Tauri, and 109 Tauri.[10]

In Bali (Indonesia), Lěmbu refers to a constellation (lintang) of an ox, corresponding to the Western constellation Taurus, the bull.[11] The IAU Working Group on Star Names adopted the name Lembu for 97 Tauri on 17 May 2026.[12]

See also

  • Tau Tauri, named Gaja from another Balinese constellation in Taurus

References

  1. ^ a b c d e Anderson, E.; Francis, Ch. (2012). “XHIP: An extended hipparcos compilation”. Astronomy Letters. 38 (5): 331. arXiv:1108.4971. Bibcode:2012AstL…38..331A. doi:10.1134/S1063773712050015. XHIP record for this object at VizieR.
  2. ^ a b c d e f g h i j k l Vallenari, A.; et al. (Gaia collaboration) (2023). “Gaia Data Release 3. Summary of the content and survey properties”. Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A…674A…1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
  3. ^ a b c “V480 Tau”. General Catalogue of Variable Stars – VizieR. Retrieved 25 May 2026.
  4. ^ a b c d Royer, F.; Zorec, J.; Gómez, A. E. (February 2007). “Rotational velocities of A-type stars: III. Velocity distributions”. Astronomy & Astrophysics. 463 (2): 671–682. arXiv:astro-ph/0610785. Bibcode:2007A&A…463..671R. doi:10.1051/0004-6361:20065224. ISSN 0004-6361.
  5. ^ a b “* i Tau”. SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 25 May 2026.
  6. ^ Núñez, Alejandro; Agüeros, Marcel A.; et al. (May 2022). “The Factory and the Beehive. IV. A Comprehensive Study of the Rotation X-Ray Activity Relation in Praesepe and the Hyades”. The Astrophysical Journal. 931 (1): 45. arXiv:2205.06461. Bibcode:2022ApJ…931…45N. doi:10.3847/1538-4357/ac6517. ISSN 0004-637X.
  7. ^ Stecklum, Bringfried (July 1987). “Photoelectric observations of lunar occultations”. The Astronomical Journal. 94: 201. Bibcode:1987AJ…..94..201S. doi:10.1086/114464.
  8. ^ “HD 286053”. SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 25 May 2026.
  9. ^ Yi, Shitong (April 1981). 中西对照恒星图表 [Atlas Comparing Chinese and Western Star Maps and Catalogues] (in Chinese). 科学出版社.
  10. ^ Stellarium, citing Yi Shitong (1981)[9]
  11. ^ Azkarrula, Youla; Hoffmann, Susanne M. “Lembu”. All Skies Encyclopaedia. IAU Working Group on Star Names. Retrieved 25 May 2026.
  12. ^ “IAU Catalog of Star Names”. Retrieved 25 May 2026.