Lambda Horologii
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Horologium |
| Right ascension | 02h 24m 53.91014s[1] |
| Declination | −60° 18′ 43.0132″ [1] |
| Apparent magnitude (V) | +5.372 |
| Characteristics | |
| Spectral type | F2III[2] |
| Astrometry | |
| Radial velocity (Rv) | 6.00 ± 7.4 km/s |
| Proper motion (μ) | RA: -71.69 ± 0.18[1] mas/yr Dec.: -131.28 ± 0.21[1] mas/yr |
| Parallax (π) | 20.25 ± 0.18[1] mas |
| Distance | 161 ± 1 ly (49.4 ± 0.4 pc) |
| Details | |
| Mass | 1.76[3] M☉ |
| Temperature | 6848 K[3] K |
| Metallicity [Fe/H] | -0.12[3] dex |
| Rotational velocity (v sin i) | +140[2] km/s |
| Other designations | |
Lambda Horologii is a yellow-white giant star in the constellation Horologium. Analysis of its temperature and metallicity gives it a mass 1.76 times that of the Sun, a surface temperature of 6848 K, and an age of 1.4 billion years.[3] Its rotational velocity is 140 km/second and has an oblateness of 0.17.[2]
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 3 Belle, G. T. (2012). "Interferometric observations of rapidly rotating stars". The Astronomy and Astrophysics Review. 20: 51. arXiv:1204.2572. Bibcode:2012A&ARv..20...51V. doi:10.1007/s00159-012-0051-2.
- 1 2 3 4 Casagrande, L.; Schönrich, R.; Asplund, M.; Cassisi, S.; Ramírez, I.; Meléndez, J.; Bensby, T.; Feltzing, S. (2011). "New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s). Improved astrophysical parameters for the Geneva-Copenhagen Survey". Astronomy & Astrophysics. 530 (A138): 21. arXiv:1103.4651. Bibcode:2011A&A...530A.138C. doi:10.1051/0004-6361/201016276.
- ↑ "Lambda Horologii". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 20 March 2016.
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