66 Leonis
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Leo |
| Right ascension | 11h 09m 13.6587s |
| Declination | −01° 19′ 59.736″ |
| Apparent magnitude (V) | 6.80±0.01 |
| Characteristics | |
| Evolutionary stage | Main sequence |
| Spectral type | A5V |
| Astrometry | |
| Radial velocity (Rv) | +12.81±0.30 km/s |
| Proper motion (μ) | RA: −65.160 mas/yr Dec.: −5.525 mas/yr |
| Parallax (π) | 12.0377±0.0292 mas |
| Distance | 270.9 ± 0.7 ly (83.1 ± 0.2 pc) |
| Absolute magnitude (MV) | 2.21 |
| Details | |
| Mass | 1.90+0.19 −0.20 M☉ |
| Radius | 1.65±0.05 R☉ |
| Luminosity | 10.5±0.4 L☉ |
| Surface gravity (log g) | 4.30±0.07 cgs |
| Temperature | 8,090±120 K |
| Age | 115+85 −92 Myr |
| Other designations | |
| BD−00°2409, HD 96855, HIP 54515, TYC 4921-1206-1 | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
66 Leonis is a single, white-hued star in the constellation of Leo. With an apparent magnitude of +6.80, it is far too faint to be viewed to the naked eye under normal conditions, and can only be faintly seen in ideal conditions under dark skies. Based on parallax measurements by the Gaia spacecraft, it lies at a distance of 271 light-years (83.1 parsecs). It is moving away from the Sun at a velocity of 12.8 km/s.
The star has a stellar classification of A5V, with the luminosity class V indicating that it is in the main sequence. It is estimated to be 100 million years old, has 1.9 times the mass of the Sun, 1.65 times the Sun's radius, and 10.5 times the Sun's luminosity. The effective temperature is 8,090 K, giving it the typical white hue of an A-type star.