Zeta Centauri

Starbox begin
name=ζ Centauri Starbox observe
epoch=J2000.0
ra=13^h55^m32.4^s
dec=−47°17′18″
appmag_v=2.55
constell=Centaurus Starbox character
class=B2.5IV
b-v=−0.22
u-b=−0.92
variable=none Starbox astrometry
radial_v=+6.5
prop_mo_ra=−57.14
prop_mo_dec=−44.75
parallax=8.48
p_error=0.74
dist_ly=385
dist_pc=118
absmag_v=−2.81 Starbox catalog
names=Alnair, HR 5231, HD 121263, SAO 224538, CD−46°8949, CP−46°6560, HIP 121263, GC 18809 Starbox reference
Simbad=HD+121263

Zeta Centauri (ζ Cen / ζ Centauri) is a star in the constellation Centaurus. It also has the traditional name Alnair or Al-Na'ir al Batn, from the Arabic البطن الناير "Al-Na'ir al-baţn [u] " meaning "The bright one of the stomach".

This is a spectroscopic binary star with a period of just over 8 days and an estimated orbital eccentricity of 0.5.

References

* A. C. Maury, 1922, "The Orbit of the Spectroscopic Binary ζ Centauri", Harvard College Observatory Circular, vol. 233.