Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Sculptor |
Right ascension | 00h 02m 19.92035s[1] |
Declination | −29° 43′ 13.4873″[1] |
Apparent magnitude (V) | 5.04[2] |
Characteristics | |
Spectral type | B5 V[3] |
U−B color index | -0.55[4] |
B−V color index | -0.16[4] |
Astrometry | |
Radial velocity (Rv) | +8.6±1.6[5] km/s |
Proper motion (μ) | RA: +9.34[1] mas/yr Dec.: +14.50[1] mas/yr |
Parallax (π) | 6.49 ± 0.25 mas[1] |
Distance | 500 ± 20 ly (154 ± 6 pc) |
Absolute magnitude (MV) | −0.89[2] |
Orbit[6] | |
Period (P) | 1,740±22 d |
Eccentricity (e) | 0.316±0.043 |
Periastron epoch (T) | 2453381 ± 37 JD |
Argument of periastron (ω) (secondary) | 43.5±6.9° |
Semi-amplitude (K1) (primary) | 12.4±0.6 km/s |
Details | |
Mass | 5.5[7] M☉ |
Luminosity | 496[2] L☉ |
Temperature | 16,100[3] K |
Metallicity [Fe/H] | 0.00[8] dex |
Rotation | 1.75222[9] d |
Rotational velocity (v sin i) | 15[10] km/s |
Other designations | |
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.[2] 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.[5] Zeta Sculptoris is near the Blanco 1 cluster as viewed from Earth, although parallax measurements indicate it to be substantially closer.[6]
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.[6] The visible member of this pair is a B-type main-sequence star with a stellar classification of B5 V.[3] 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).[11] According to Eggleton and Tokovinin (2008), it is most likely gravitationally bound to the primary component.[12]