Astronomy:60 Leonis
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Leo |
| Right ascension | 11h 02m 19.77577s[1] |
| Declination | +20° 10′ 47.4265″[1] |
| Apparent magnitude (V) | 4.398[2] |
| Characteristics | |
| Spectral type | A1 Vm[3] |
| U−B color index | +0.05[4] |
| B−V color index | +0.07[4] |
| Astrometry | |
| Radial velocity (Rv) | −11.10±0.7[5] km/s |
| Proper motion (μ) | RA: −8.67[1] mas/yr Dec.: 39.07[1] mas/yr |
| Parallax (π) | 25.73 ± 0.18[1] mas |
| Distance | 126.8 ± 0.9 ly (38.9 ± 0.3 pc) |
| Details[6] | |
| Mass | 2.11±0.06 M☉ |
| Radius | 1.80±0.07 R☉ |
| Luminosity | 24.1±1.4 L☉ |
| Surface gravity (log g) | 4.22±0.20 cgs |
| Temperature | 9,540±180 K |
| Metallicity [Fe/H] | 0.00±0.10 dex |
| Rotational velocity (v sin i) | 17.2±2.0[7] km/s |
| Age | 195±15 Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
60 Leonis is a star in the zodiac constellation of Leo, located 127 light years from the Sun. It is visible to the naked eye as a faint, white-hued star with an apparent visual magnitude of 4.4.[2] The star is moving closer to the Earth with a heliocentric radial velocity of −11 km/s.[5]
This is an Am star[9] with a stellar classification of A1 Vm,[3] although LeBlanc et al. (2015) consider it an Ap star.[7] The atmosphere displays clear indications of stratification of iron with no significant magnetic field detected.[7] It is 195 million years old with a relatively low projected rotational velocity of 17 km/s.[7] The star has 2.11 times the mass of the Sun and 1.80 times the Sun's radius. It is radiating 24.1 times the Sun's luminosity from its photosphere at an effective temperature of 9,540 K.[6]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, doi:10.1051/0004-6361:20078357, Bibcode: 2007A&A...474..653V.
- ↑ 2.0 2.1 Høg, E. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics 355: L27–L30. Bibcode: 2000A&A...355L..27H.
- ↑ 3.0 3.1 Sreedhar Rao, S.; Abhyankar, K. D. (1991). "MK morphological study of AM stars at 66 A/mm". Journal of Astrophysics and Astronomy 12 (2): 133. doi:10.1007/BF02709302. Bibcode: 1991JApA...12..133S.
- ↑ 4.0 4.1 Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Catalogue of Eggen's UBV Data. Bibcode: 1986EgUBV........0M.
- ↑ 5.0 5.1 Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters 32 (11): 759–771. doi:10.1134/S1063773706110065. Bibcode: 2006AstL...32..759G.
- ↑ 6.0 6.1 Maestro, V.; Che, X.; Huber, D.; Ireland, M. J.; Monnier, J. D.; White, T. R.; Kok, Y.; Robertson, J. G. et al. (2013). "Optical interferometry of early-type stars with PAVO@CHARA - I. Fundamental stellar properties". Monthly Notices of the Royal Astronomical Society 434 (2): 1321. doi:10.1093/mnras/stt1092. Bibcode: 2013MNRAS.434.1321M.
- ↑ 7.0 7.1 7.2 7.3 LeBlanc, F. et al. (November 2015). "Project VeSElkA: results of abundance analysis I - HD 71030, HD 95608, HD 116235 and HD 186568". Monthly Notices of the Royal Astronomical Society 453 (4): 3766–3771. doi:10.1093/mnras/stv1466. Bibcode: 2015MNRAS.453.3766L.
- ↑ "* b Leo". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=%2A+b+Leo.
- ↑ Adelman, Saul J. et al. (May 1999). "Elemental abundance analyses with DAO spectrograms - XXI. The hot metallic-lined stars 60 Leonis and 6 Lyrae". Monthly Notices of the Royal Astronomical Society 305 (3): 591–601. doi:10.1046/j.1365-8711.1999.02435.x. Bibcode: 1999MNRAS.305..591A.
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