Astronomy:T Centauri
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Short description: Variable star in the constellation Centaurus
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| Observation data Equinox J2000.0]] (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[1] mas/yr Dec.: +3.365[1] mas/yr |
| Parallax (π) | 2.4007 ± 0.0687[1] mas |
| Distance | 1,360 ± 40 ly (420 ± 10 pc) |
| Other designations | |
| Database references | |
| SIMBAD | data |
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
- ↑ 1.0 1.1 1.2 1.3 1.4 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ 2.0 2.1 2.2 2.3 2.4 Watson, Christopher (27 December 2012). "T Centauri". AAVSO Website. American Association of Variable Star Observers. http://www.aavso.org/vsx/index.php?view=detail.top&oid=7300.
- ↑ 3.0 3.1 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. doi:10.1134/S1063772917010085. Bibcode: 2017ARep...61...80S.
- ↑ "T Centauri". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=T+Centauri.
- ↑ "ASAS All Star Catalogue". The All Sky Automated Survey. http://www.astrouw.edu.pl/asas/?page=aasc.
- ↑ Markwick, E. E. (July 1895). "Note on the variable star T Centauri, Cord. GC. 18609". Astronomische Nachrichten 138 (13): 213. doi:10.1002/asna.18951381304. Bibcode: 1895AN....138..213M.
- ↑ "T Cen". AAVSO. https://www.aavso.org/vsx/index.php?view=detail.top&oid=7300.
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