Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Sculptor |
Right ascension | 00h 09m 21.06696s[1] |
Declination | −27° 59′ 16.5322″[1] |
Apparent magnitude (V) | +5.51 (6.23 + 6.29)[2] |
Characteristics | |
Spectral type | F2V[3] (F4 III + F3 III)[2] |
U−B color index | +0.06[4] |
B−V color index | +0.42[4] |
Astrometry | |
Radial velocity (Rv) | 7.7±1.6[5] km/s |
Proper motion (μ) | RA: +70.11[1] mas/yr Dec.: −8.97[1] mas/yr |
Parallax (π) | 12.91 ± 0.72 mas[1] |
Distance | 250 ± 10 ly (77 ± 4 pc) |
Absolute magnitude (MV) | 2.05[6] |
Orbit[7] | |
Period (P) | 616.04 yr |
Semi-major axis (a) | 1.500″ |
Eccentricity (e) | 0.103 |
Inclination (i) | 98.98° |
Longitude of the node (Ω) | 81.75° |
Periastron epoch (T) | 2095.68 |
Argument of periastron (ω) (secondary) | 256.86° |
Details | |
κ1 Scl A | |
Mass | 1.53[8] M☉ |
Luminosity | 31.3[9] L☉ |
Surface gravity (log g) | 3.94[8] cgs |
Temperature | 6,697±228[8] K |
Metallicity [Fe/H] | +0.05[10] dex |
Rotational velocity (v sin i) | 116.8±5.8[6] km/s |
Age | 2.0[8] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
Kappa1 Sculptoris is a binary star[2] system in the southern constellation of Sculptor. It is faintly visible to the naked eye, with a combined apparent visual magnitude of +5.51.[2] Based upon an annual parallax shift of 12.91 mas as measured from Earth,[1] it is located roughly 250 light years from the Sun.
The pair orbit each other with an estimated period of 616 years, a semimajor axis of 1.5 arc seconds, and an eccentricity of 0.1.[7] Both components are evolved, yellow-white hued, F-type giant stars. The primary, component A, has a visual magnitude of 6.23[2] and a stellar classification of F4 III.[2] The companion, component B, is magnitude 6.29[2] and of class F3 III.[2] Their composite spectrum is classified as F2V.[3] The mass ratio is 0.782, meaning the secondary is only 78.2% as massive as the primary.[12] An 18th magnitude companion star lies 73.4 arc seconds distant along a position angle of 243°, as of 1998.[13]