Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Leo |
Right ascension | 11h 30m 18.89196s[1] |
Declination | −03° 00′ 12.5712″[1] |
Apparent magnitude (V) | 4.77[2] |
Characteristics | |
Spectral type | K3+ III Fe−0.5[3] |
U−B color index | +1.529±0.016[2] |
B−V color index | +1.54[4] |
R−I color index | +0.84[4] |
Astrometry | |
Radial velocity (Rv) | 18.8±0.8[2] km/s |
Proper motion (μ) | RA: 20.901[1] mas/yr Dec.: −17.944[1] mas/yr |
Parallax (π) | 6.7249 ± 0.2901 mas[1] |
Distance | 480 ± 20 ly (149 ± 6 pc) |
Absolute magnitude (MV) | −1.56[2] |
Details | |
Radius | 54[1] R☉ |
Luminosity | 641[1] L☉ |
Surface gravity (log g) | 1.56±0.20[5] cgs |
Temperature | 4,001±32[5] K |
Metallicity [Fe/H] | −0.24±0.07[5] dex |
Rotational velocity (v sin i) | ≤ 19[4] km/s |
Other designations | |
Database references | |
SIMBAD | data |
87 Leonis is a single[7] star in the zodiac constellation of Leo,[6] located approximately 480[1] light years away from the Sun. It has the Bayer designation e Leonis; 87 Leonis is the Flamsteed designation. This object is visible by the naked eye as a faint orange-hued star with an apparent visual magnitude of 4.77.[2] It is moving away from the Earth with a heliocentric radial velocity of 19 km/s.[2] The star is positioned near the ecliptic and thus is subject to occultation by the Moon.[8]
This is an aging K-type giant star with a stellar classification of K3+ III Fe−0.5,[3] which means it has exhausted the hydrogen at its core and evolved away from the main sequence. The suffix notation indicates a mild underabundance of iron in the atmosphere. It has expanded to 37[9] times the Sun's radius and is radiating over a thousand[2] times the Sun's luminosity from its photosphere at an effective temperature of 4,001 K.[5]