Mu Leonis
Star in the constellation Leo / From Wikipedia, the free encyclopedia
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Mu Leonis (μ Leonis, abbreviated Mu Leo, μ Leo), also named Rasalas /ˈræsəlæs/,[8][9] 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.
Quick Facts Constellation, Right ascension ...
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 | |
Spectral type | K2 IIIb CN1 Ca1[3] |
U−B color index | +1.38[2] |
B−V color index | +1.23[2] |
Astrometry | |
Radial velocity (Rv) | 14.03±0.19[4] 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[5] |
Details | |
Mass | 1.5±0.1[6] M☉ |
Radius | 14[4] R☉ |
Luminosity | 63[4] L☉ |
Surface gravity (log g) | 2.5[4] cgs |
Temperature | 4,436[4] K |
Metallicity [Fe/H] | +0.17[4] dex |
Rotational velocity (v sin i) | 4.5[4] km/s |
Age | 3.35±0.70[6] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
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