T Centauri

T Centauri
Observation data; Epoch J2000.0 Equinox J2000.0
Constellation	Centaurus
Right ascension	13h 41m 45.56353s
Declination	−33° 35′ 50.5600″
Apparent magnitude (V)	5.56 – 8.44
Characteristics
Evolutionary stage	AGB or post-AGB
Spectral type	K0:e-M4II:e
Variable type	semiregular
Astrometry
Radial velocity (Rv)	+32.6±2.5 km/s
Proper motion (μ)	RA: −27.747 mas/yr ; Dec.: +3.365 mas/yr
Parallax (π)	2.4007±0.0687 mas
Distance	1,360 ± 40 ly ; (420 ± 10 pc)
Other designations
	T Cen, CD−32°9549, HD 119090, HIP 66825, HR 5147, SAO 204739
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]

Quick Facts Observation data Epoch J2000.0 Equinox J2000.0, Constellation ...

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

Observation data Epoch J2000.0 Equinox J2000.0
Constellation	Centaurus
Right ascension	13^h 41^m 45.56353^s^[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 (R_v)	+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]
Distance	1,360 ± 40 ly (420 ± 10 pc)

Other designations
T Cen, CD−32°9549, HD 119090, HIP 66825, HR 5147, SAO 204739^[4]
Database references
SIMBAD	data

References