| Observation data EpochJ2000.0 EquinoxJ2000.0 (ICRS) | |
|---|---|
| Constellation | Leo |
| Right ascension | 09h 43m 43.90682s[1] |
| Declination | +14° 01′ 18.1311″[1] |
| Apparent magnitude (V) | 5.38[2] |
| Characteristics | |
| Spectral type | M2 IIIab[3] |
| U−Bcolor index | +1.95[2] |
| B−Vcolor index | +1.60[2] |
| Astrometry | |
| Radial velocity (Rv) | 10.98±0.18[1] km/s |
| Proper motion (μ) | RA: +1.614mas/yr[1] Dec.: −2.014mas/yr[1] |
| Parallax (π) | 5.3048±0.0890 mas[1] |
| Distance | 610 ± 10 ly (189 ± 3 pc) |
| Absolute magnitude (MV) | −1.39[4] |
| Details | |
| Luminosity | 903[5] L☉ |
| Temperature | 3,756[5] K |
| Other designations | |
| ψ Leo,16 Leo,BD+14°2136,FK5 1252,HD 84194,HIP 47723,HR 3866,SAO 98733[6] | |
| Database references | |
| SIMBAD | data |
ψ Leonis (Latinised asPsi Leonis, abbreviated toψ Leo orpsi Leo), is a solitary[3]star located in thezodiacconstellation ofLeo, to the east-northeast ofRegulus. It is faintly visible to the naked eye with anapparent visual magnitude of 5.38.[2] Based uponstellar parallax measurements,[1] it is located around 610 light years from theSun. At that distance, the visual magnitude of the star is diminished by anabsorption factor of 0.3 due tointerstellar dust.[4]
Psi Leonis is anevolvedred giant star with astellar classification of M2 IIIab.[3] It shines with a luminosity over 900 times that of the Sun from a relatively coolouter atmosphere that has aneffective temperature of 3,756K.[5] It is a suspected variable star with a measured brightness variation of 0m.018.[7] Psi Leonis has a magnitude 11.63visual companion at anangular separation of 281.60 arcseconds along aposition angle of 139°, as of 2000.[8]
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