Kappa1 Sculptoris

For other star systems with this Bayer designation, see κ Sculptoris.
Kappa1 Sculptoris
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]
Distance250 ± 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
Mass1.53[8] M☉
Luminosity31.3[9] L☉
Surface gravity (log g)3.94[8] cgs
Temperature6,697±228[8] K
Metallicity [Fe/H]+0.05[10] dex
Rotational velocity (v sin i)116.8±5.8[6] km/s
Age2.0[8] Gyr
Other designations
κ1 Scl, CD−28° 16, HD 493, HIP 761, HR 24, SAO 166083, ADS 111, WDS J00094-2759AB[11]
Database references
SIMBADdata

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]

  1. ^ a b c d e f Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b c d e f g h Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference houk1979 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Hurly1975 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference deBruijne2012 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference AmmlerVonEiff2012 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference ORB6 was invoked but never defined (see the help page).
  8. ^ a b c d Cite error: The named reference David2015 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Mcdonald2012 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Casagrande2011 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Makarov was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference WDSC2014 was invoked but never defined (see the help page).