HD 125072

Gliese 542
Observation data
Epoch J2000      Equinox J2000
Constellation Centaurus
Right ascension 14h 19m 04.8348s[1]
Declination −59° 22′ 44.533″[1]
Apparent magnitude (V) 6.66[1]
Characteristics
Spectral type K3 IV[1]
U−B color index +0.905[1]
B−V color index +1.025[1]
Variable type None
Astrometry
Radial velocity (Rv) −14.9 km/s
Proper motion (μ) RA: −454.53 mas/yr
Dec.: −810.00 mas/yr
Parallax (π) 84.50 ± 0.79[1] mas
Distance 38.6 ± 0.4 ly
(11.8 ± 0.1 pc)
Details
Surface gravity (log g) 4.5[2]
Temperature 4,965[2] K
Metallicity [Fe/H] = -0.70[3]
Age 9.98×109[3] years
Other designations

HD 125072 (Gliese 542) is K3-IV class star in the constellation Centaurus. The components of the space velocity for this star are U=−18.5, V=−6.9 and W=−26.9 km/s. Based on the composition and kinematics of this star, it has an estimated age of about 10 billion years.[3]

References

  1. ^ a b c d e f g h "SIMBAD query result: LHS 2892 -- High proper-motion Star". Centre de Données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-id?protocol=html&Ident=Gliese+542. Retrieved 2008-04-09. 
  2. ^ a b Perrin, M.-N.; Cayrel de Strobel, G.; Dennefeld, M. (1988). "High S/N detailed spectral analysis of four G and K dwarfs within 10 PC of the sun". Astronomy and Astrophysics 191 (2): 237–247. Bibcode 1988A&A...191..237P. 
  3. ^ a b c Lachaume, R.; Dominik, C.; Lanz, T.; Habing, H. J. (1999). "Age determinations of main-sequence stars: combining different methods". Astronomy and Astrophysics 348: 897–909. Bibcode 1999A&A...348..897L.