E Centauri

This article is about E Centauri and is not to be confused with e Centauri or ε Centauri.

E Centauri is a single^[8] star in the southern constellation of Centaurus. It is a white-hued star that is dimly visible to the naked eye with an apparent visual magnitude of +5.34.^[1] The distance to this object is approximately 560 light years based on parallax, and it has an absolute magnitude of −0.97.^[1] It is drifting closer to the Sun with a radial velocity of +7 km/s,^[1] and it is a candidate member of the Lower Centaurus Crux subgroup of the Sco OB2 association.^[9]

E Centauri

Observation data Epoch J2000.0      Equinox J2000.0
Constellation	Centaurus[1]
Right ascension	12h 08m 14.70518s[2]
Declination	−48° 41′ 33.0323″[2]
Apparent magnitude (V)	+5.34[1]
Characteristics
Evolutionary stage	subgiant[3]
Spectral type	B9.5/A0V[4]
B−V color index	−0.010±0.007[1]
Astrometry
Radial velocity (Rv)	+7.2±0.5[1] km/s
Proper motion (μ)	RA: −27.271[2] mas/yr Dec.: −7.342[2] mas/yr
Parallax (π)	5.8040±0.2042 mas[2]
Distance	560 ± 20 ly (172 ± 6 pc)
Absolute magnitude (MV)	−0.97[1]
Details
Mass	3.38±0.09[3] M☉
Radius	5.84[5] R☉
Luminosity	302+39 −35[3] L☉
Surface gravity (log g)	3.16[5] cgs
Temperature	9,886±69[3] K
Rotational velocity (v sin i)	74[3] km/s
Age	277[6] Myr
Other designations
E Cen, CD−47°7396, FK5 446, GC 16581, HD 105416, HIP 59184, HR 4620, SAO 223235[7]
Database references
SIMBAD	data

This is a late B- or early A-type main-sequence star with a stellar classification of B9.5/A0V,^[4] which indicates it is generating energy via core hydrogen fusion. It has 3.4^[3] times the mass of the Sun and is spinning with a projected rotational velocity of 74 km/s.^[3] The star is radiating 302^[3] times the luminosity of the Sun from its photosphere at an effective temperature of 9,886 K.^[3]