Zeta Sculptoris

ζ Sculptoris

Template:Location mark Location of ζ Sculptoris (circled)
Observation data Epoch J2000      Equinox J2000
Constellation	Sculptor
Right ascension	Template:RA
Declination	Template:DEC
Apparent magnitude (V)	5.04
Characteristics
Spectral type	B5 V
U−B Template:Engvar	-0.55
B−V Template:Engvar	-0.16
Astrometry
Radial velocity (Rv)	km/s
Proper motion (μ)	RA: +9.34 mas/yr Dec.: +14.50 mas/yr
Parallax (π)	6.49±0.25 mas
Distance	Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)	−0.89
Orbit
Period (P)
Eccentricity (e)
Periastron epoch (T)	2453381 ± 37 JD
Argument of periastron (ω) (secondary)	°
Semi-amplitude (K1) (primary)	km/s
Details
Mass	5.5 Template:Solar mass
Luminosity	496 Template:Solar luminosity
Temperature	16,100 K
Metallicity [Fe/H]	0.00 dex
Rotation	1.75222 d
Rotational velocity (v sin i)	15 km/s
Metallicity [Fe/H]	{{{metal_fe2}}} dex
Other designations
Template:Odlist
Database references
SIMBAD	data

Zeta Sculptoris, Latinized from ζ Sculptoris, is a multiple star system in the constellation Sculptor. It is faintly visible to the naked eye with an apparent magnitude of 5.04. The annual parallax shift is 6.49 mas, which yields a distance estimate of about 500 light years from the Sun. It is moving further away with a radial velocity of +8.6 km/s. Zeta Sculptoris is near the Blanco 1 cluster as viewed from Earth, although parallax measurements indicate it to be substantially closer.

The primary component, designated Zeta Sculptoris A, is a single-lined, low amplitude spectroscopic binary system with an orbital period of 4.8 years and an eccentricity of 0.32. The visible member of this pair is a B-type main-sequence star with a stellar classification of B5 V. It has a 13th magnitude companion, Zeta Sculptoris B, at an angular separation of 3 arcseconds along a position angle of 330° (as of 1927). According to Eggleton and Tokovinin (2008), it is most likely gravitationally bound to the primary component.