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T Centauri

From Wikipedia, the free encyclopedia
T Centauri
Location of T Centauri (circled in red)
Observation data
Epoch J2000.0      Equinox ICRS
Constellation Centaurus
Right ascension 13h 41m 45.56353s[1]
Declination −33° 35′ 50.5600″[1]
Apparent magnitude (V) 5.56 – 8.44[2]
Characteristics
Evolutionary stage AGB or post-AGB[2]
Spectral type K0:e-M4II:e[2]
Variable type semiregular[3]
Astrometry
Radial velocity (Rv)+32.6±2.5[1] km/s
Proper motion (μ) RA: −27.747 mas/yr[1]
Dec.: +3.365 mas/yr[1]
Parallax (π)2.4007±0.0687 mas[1]
Distance1,360 ± 40 ly
(420 ± 10 pc)
Other designations
T Cen, CD−32°9549, HD 119090, HIP 66825, HR 5147, SAO 204739[4]
Database references
SIMBADdata
A visual band light curve for T Centauri, plotted from ASAS data[5]

T Centauri is a variable star located in the far southern constellation Centaurus. It varies between magnitudes 5.56 and 8.44 over 181.4 days, making it intermittently visible to the naked eye.[2] Pulsating between spectral classes K0:e and M4II:e, it has been classed as a semiregular variable,[3] though Sebastian Otero of the American Association of Variable Star Observers has noted its curve more aligned with RV Tauri variable stars and has classified it as one.[2]

The variability of the star was discovered in 1894 by Ernest Elliott Markwick, and independently by Williamina Fleming in 1895.[6][7]

References

[edit]
  1. 1 2 3 4 5 6 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.
  2. 1 2 3 4 5 Watson, Christopher (27 December 2012). "T Centauri". AAVSO Website. American Association of Variable Star Observers. Retrieved 22 July 2014.
  3. 1 2 Samus', N. N.; Kazarovets, E. V.; Durlevich, O. V.; Kireeva, N. N.; Pastukhova, E. N. (2017). "General catalogue of variable stars: Version GCVS 5.1". Astronomy Reports. 61 (1): 80. Bibcode:2017ARep...61...80S. doi:10.1134/S1063772917010085.
  4. ↑ "T Centauri". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2025-05-25.
  5. ↑ "ASAS All Star Catalogue". The All Sky Automated Survey. Retrieved 8 December 2021.
  6. ↑ Markwick, E. E. (July 1895). "Note on the variable star T Centauri, Cord. GC. 18609". Astronomische Nachrichten. 138 (13): 213. Bibcode:1895AN....138..213M. doi:10.1002/asna.18951381304.
  7. ↑ "T Cen". The International Variable Star Index. AAVSO. Retrieved 19 December 2024.


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