| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Horologium |
| Right ascension | 03 03 36.81891 |
| Declination | −59° 44′ 15.9925″ |
| Apparent magnitude (V) | 5.11 |
| Characteristics | |
| Spectral type | F0 III/IV |
| B−V color index | +0.34 |
| Astrometry | |
| Radial velocity (Rv) | 17.3±2.8 km/s |
| Proper motion (μ) | RA: −73.29 mas/yr Dec.: −64.06 mas/yr |
| Parallax (π) | 23.04 ± 0.16 mas |
| Distance | 141.6 ± 1.0 ly (43.4 ± 0.3 pc) |
| Absolute magnitude (MV) | 1.99 |
| Details | |
| Mass | 1.53+0.08 −0.01 M☉ |
| Luminosity | 13 L☉ |
| Surface gravity (log g) | 3.80±0.02 cgs |
| Temperature | 6,898±63 K |
| Metallicity | −0.42±0.05 dex |
| Rotational velocity (v sin i) | 79.2±4.0 km/s |
| Age | 1.95+0.20 −0.14 Gyr |
| Other designations | |
| μ Hor, CPD−60° 236, HD 19319, HIP 14240, HR 934, SAO 232981 | |
| Database references | |
| SIMBAD | data |
Mu Horologii (μ Horologii) is a solitary, yellow-white hued star in the southern constellation of Horologium. It is faintly visible to the naked eye with an apparent visual magnitude of 5.11. Based upon an annual parallax shift of 23.04 mas as seen from Earth, it is located about 141.6 light years from the Sun.
This is an evolving F-type star with a stellar classification of F0 III/IV, showing mixed traits of a subgiant and a giant star. It is around two billion years old with a projected rotational velocity of 79.2 km/s. The star has 1.5 times the mass of the Sun and is radiating 13 times the solar luminosity from its photosphere at an effective temperature of 6,898 K.
References
- ^ 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, S2CID 18759600.
- ^ Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory, 4 (99), Bibcode:1966CoLPL...4...99J.
- ^ Houk, Nancy; Cowley, A. P. (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 1, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode:1975mcts.book.....H.
- de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics, 546: 14, arXiv:1208.3048, Bibcode:2012A&A...546A..61D, doi:10.1051/0004-6361/201219219, S2CID 59451347, A61.
- ^ Ammler-von Eiff, Matthias; Reiners, Ansgar (June 2012), "New measurements of rotation and differential rotation in A-F stars: are there two populations of differentially rotating stars?", Astronomy & Astrophysics, 542: A116, arXiv:1204.2459, Bibcode:2012A&A...542A.116A, doi:10.1051/0004-6361/201118724, S2CID 53666672.
- ^ Ramírez, I.; et al. (September 2012), "Lithium Abundances in nearby FGK Dwarf and Subgiant Stars: Internal Destruction, Galactic Chemical Evolution, and Exoplanets", The Astrophysical Journal, 756 (1): 46, arXiv:1207.0499, Bibcode:2012ApJ...756...46R, doi:10.1088/0004-637X/756/1/46, S2CID 119199829.
- ^ McDonald, I.; et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society, 427 (1): 343–57, arXiv:1208.2037, Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x, S2CID 118665352.
- "mu. Hor". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-04-25.
{{cite web}}: CS1 maint: postscript (link) - Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976.
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