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Mu Leonis
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Leo |
| Right ascension | 09h 52m 45.81654s[1] |
| Declination | +26° 00′ 25.0319″[1] |
| Apparent magnitude (V) | 3.88[2] |
| Characteristics | |
| Evolutionary stage | Red giant branch[3] |
| Spectral type | K2 IIIb CN1 Ca1[4] |
| U−B color index | +1.38[2] |
| B−V color index | +1.23[2] |
| Astrometry | |
| Radial velocity (Rv) | 14.03±0.19[5] km/s |
| Proper motion (μ) | RA: −217.31[1] mas/yr Dec.: −54.26[1] mas/yr |
| Parallax (π) | 26.28 ± 0.16 mas[1] |
| Distance | 124.1 ± 0.8 ly (38.1 ± 0.2 pc) |
| Absolute magnitude (MV) | +0.83[6] |
| Details | |
| Mass | 1.5±0.1[7] M☉ |
| Radius | 11.89±0.11[8] R☉ |
| Luminosity | 53±1[8] L☉ |
| Surface gravity (log g) | 2.43±0.06[8] cgs |
| Temperature | 4,519±23[8] K |
| Metallicity [Fe/H] | 0.27±0.03[8] dex |
| Rotational velocity (v sin i) | 4.5[5] km/s |
| Age | 3.35±0.70,[7] ~5.0[3] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Mu Leonis (μ Leonis, abbreviated Mu Leo, μ Leo), also named Rasalas /ˈræsəlæs/,[10][11] is a star in the constellation of Leo. The apparent visual magnitude of this star is 3.88,[2] which is bright enough to be seen with the naked eye. Based upon an annual parallax shift of 0.02628 arc seconds as measured by the Hipparcos satellite,[1] this system is 124 light-years (38.1 parsecs) from the Sun. In 2014, an exoplanet was discovered to be orbiting the star.
- ^ a b c d e f Cite error: The named reference
vanLeeuwen2007was invoked but never defined (see the help page). - ^ a b c d Cite error: The named reference
Mermilliod1986was invoked but never defined (see the help page). - ^ a b Cite error: The named reference
:0was invoked but never defined (see the help page). - ^ Cite error: The named reference
Keenan1989was invoked but never defined (see the help page). - ^ a b Cite error: The named reference
Massarotti2008was invoked but never defined (see the help page). - ^ Cite error: The named reference
Cardini2005was invoked but never defined (see the help page). - ^ a b Cite error: The named reference
Lee2014was invoked but never defined (see the help page). - ^ a b c d e Cite error: The named reference
soubiranwas invoked but never defined (see the help page). - ^ Cite error: The named reference
SIMBADwas invoked but never defined (see the help page). - ^ Rumrill, H. B. (June 1936). "Star Name Pronunciation". Publications of the Astronomical Society of the Pacific. 48 (283). San Francisco, California: 139. Bibcode:1936PASP...48..139R. doi:10.1086/124681. S2CID 120743052.
- ^ "Naming Stars". IAU.org. Retrieved 16 December 2017.
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