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 | |
| Mass | 0.806±0.017[6] M☉ |
| Surface gravity (log g) | 4.48[3] cgs |
| Temperature | 4,903[3] K |
| Metallicity [Fe/H] | −0.70[7] dex |
| Rotational velocity (v sin i) | 3.97[8] km/s |
| Age | 9.98[7] Gyr |
| Other designations | |
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.[7]
References
- 1 2 3 4 5 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.
- 1 2 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
- 1 2 3 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
- 1 2 Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV data. SIMBAD, Bibcode:1986EgUBV........0M
- ↑ 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
- ↑ Tsantaki, M.; et al. (July 2013), "Deriving precise parameters for cool solar-type stars. Optimizing the iron line list", Astronomy & Astrophysics 555: A150, arXiv:1304.6639, Bibcode:2013A&A...555A.150T, doi:10.1051/0004-6361/201321103.
- 1 2 3 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.
- ↑ 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.
- ↑ "LHS 2892 -- High proper-motion Star". SIMBAD. Centre de Données astronomiques de Strasbourg. Retrieved 2008-04-09.
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