HD 125072

From Wikipedia, the free encyclopedia
Jump to: navigation, search
HD 125072
Observation data
Epoch J2000      Equinox J2000
Constellation Centaurus
Right ascension 14h 19m 04.83491s[1]
Declination −59° 22′ 44.5272″[1]
Apparent magnitude (V) 6.637[2]
Characteristics
Spectral type K3 IV[3]
U−B color index +0.905[4]
B−V color index +1.025[4]
Astrometry
Radial velocity (Rv) −14.9[5] km/s
Proper motion (μ) RA: −454.35[1] mas/yr
Dec.: −809.49[1] mas/yr
Parallax (π) 84.76 ± 0.69[1] mas
Distance 38.5 ± 0.3 ly
(11.80 ± 0.10 pc)
Absolute magnitude (MV) 6.28[2]
Details
Surface gravity (log g) 4.48[3] cgs
Temperature 4,903[3] K
Metallicity [Fe/H] −0.70[6] dex
Rotational velocity (v sin i) 3.97[7] km/s
Age 9.98[6] Gyr
Other designations
CD-58°5564, GJ 542, HD 125072, HIP 69972, LHS 2892, LTT 5625, SAO 241627.[8]

HD 125072 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.[6]

References[edit]

  1. ^ a b c d e van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. 
  2. ^ a b Holmberg, J.; Nordström, B.; Andersen, J. (July 2009), "The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics", Astronomy and Astrophysics 501 (3): 941–947, arXiv:0811.3982, Bibcode:2009A&A...501..941H, doi:10.1051/0004-6361/200811191 
  3. ^ a b c Gray, R. O. et al. (July 2006), "Contributions to the Nearby Stars (NStars) Project: spectroscopy of stars earlier than M0 within 40 pc-The Southern Sample", The Astronomical Journal 132 (1): 161–170, arXiv:astro-ph/0603770, Bibcode:2006AJ....132..161G, doi:10.1086/504637 
  4. ^ a b Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV data. SIMBAD, Bibcode:1986EgUBV........0M 
  5. ^ Evans, D. S. (June 20–24, 1966), "The Revision of the General Catalogue of Radial Velocities", in Batten, Alan Henry; Heard, John Frederick, Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30, University of Toronto: International Astronomical Union, Bibcode:1967IAUS...30...57E 
  6. ^ a b c Lachaume, R. et al. (1999). "Age determinations of main-sequence stars: combining different methods". Astronomy and Astrophysics 348: 897–909. Bibcode:1999A&A...348..897L. 
  7. ^ Martínez-Arnáiz, R. et al. (September 2010). "Chromospheric activity and rotation of FGK stars in the solar vicinity. An estimation of the radial velocity jitter". Astronomy and Astrophysics 520: A79. arXiv:1002.4391. Bibcode:2010A&A...520A..79M. doi:10.1051/0004-6361/200913725. 
  8. ^ "LHS 2892 -- High proper-motion Star". SIMBAD. Centre de Données astronomiques de Strasbourg. Retrieved 2008-04-09.