Iota Leonis
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| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Leo |
| Right ascension | 11h 23m 55.4523s[1] |
| Declination | +10° 31′ 46.231″[1] |
| Apparent magnitude (V) | 4.00[2] |
| Characteristics | |
| Spectral type | F4 IV |
| U−B color index | 1.420[3] |
| B−V color index | 0.456[3] |
| Variable type | Suspected[4] |
| Astrometry | |
| Radial velocity (Rv) | −10.3[5] km/s |
| Proper motion (μ) | RA: 140.75[1] mas/yr Dec.: −77.80[1] mas/yr |
| Parallax (π) | 41.26 ± 1.16[1] mas |
| Distance | 79 ± 2 ly (24.2 ± 0.7 pc) |
| Details | |
| Mass | 1.62−1.70[6] M☉ |
| Surface gravity (log g) | 3.98[7] |
| Luminosity | 11.5[6] L☉ |
| Temperature | 6,739[7] K |
| Metallicity | ![\begin{smallmatrix}\left[\frac{Fe}{H}\right]\ =\ 0.06\end{smallmatrix}](http://upload.wikimedia.org/wikipedia/en/math/c/f/1/cf1480cd604ef050af917a38f03c57d9.png) [7] |
| Rotational velocity (v sin i) | 16[6] km/s |
| Age | 1.7[6] Gyr |
| Other designations | |
Iota Leonis is a star in the constellation Leo.
It was known as 太微右垣三, "the Third (Star) of the Right Wall of the Supreme Palace Enclosure" or 次將 (Tsze Tseang, Mandarin cìjiàng), "the Vice-General", in traditional Chinese astronomy[8]
Iota Leonis is of the spectral class F4IV and apparent magnitude +3.94. It is a spectroscopic binary, which means it is a binary star with components that are too close together to be able to resolve individually through a telescope.[6]
[edit] References
- ^ a b c d e Perryman, M. A. C.; et al. (April 1997). "The HIPPARCOS Catalogue". Astronomy & Astrophysics 323: L49–L52. Bibcode 1997A&A...323L..49P.
- ^ a b "iot Leo -- Spectroscopic binary". SIMBAD. Centre de Données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=iot+Leo. Retrieved 2010-04-07.
- ^ a b Rufener, F. (October 1976). "Second catalogue of stars measured in the Geneva Observatory photometric system". Astronomy & Astrophysics Supplement Series 26: 275−351. Bibcode 1976A&AS...26..275R.
- ^ Kukarkin, B. V.; et al. (1981). Nachrichtenblatt der Vereinigung der Sternfreunde e.V. (Catalogue of suspected variable stars). Moscow, Academy of Sciences USSR Shternberg. Bibcode 1981NVS...C......0K.
- ^ Wilson, R. E. (1953). "General Catalogue of Stellar Radial Velocities". Washington D.C.: Carnegie Institute. Bibcode 1953GCRV..C......0W. http://adsabs.harvard.edu/abs/1953GCRV..C......0W. Retrieved 2009-10-24.
- ^ a b c d e Bi, S.-L.; Basu, Sarbani; Li, L.-H. (February 2008). "Seismological Analysis of the Stars γ Serpentis and ι Leonis: Stellar Parameters and Evolution". The Astrophysical Journal 673 (2): 1093–1105. Bibcode 2008ApJ...673.1093B. doi:10.1086/521575.
- ^ a b c Balachandran, Suchitra (May 1, 1990). "Lithium depletion and rotation in main-sequence stars". Astrophysical Journal, Part 1 354: 310−332. Bibcode 1990ApJ...354..310B. doi:10.1086/168691.
- ^ Richard Hinckley Allen: Star Names — Their Lore and Meaning: Leo
[edit] See also
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