73 Leonis
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Leo |
| Right ascension | 11h 15m 51.8801s |
| Declination | +13° 18′ 27.235″ |
| Apparent magnitude (V) | +5.32 |
| Characteristics | |
| Spectral type | K2 III + F6V |
| B−V color index | +1.19 |
| Astrometry | |
| Radial velocity (Rv) | +14.51±0.01 km/s |
| Proper motion (μ) | RA: +7.895 mas/yr Dec.: −10.518 mas/yr |
| Parallax (π) | 7.0432±0.1980 mas |
| Distance | 460 ± 10 ly (142 ± 4 pc) |
| Absolute magnitude (MV) | −0.58 |
| Orbit | |
| Period (P) | 8.10420±0.00059 yr |
| Semi-major axis (a) | 45.470±0.058 mas (6.535 AU) |
| Eccentricity (e) | 0.42510±0.00096 |
| Inclination (i) | 58.03±0.16° |
| Longitude of the node (Ω) | 283.410±0.076° |
| Periastron epoch (T) | 2006.2870±0.0011 |
| Argument of periastron (ω) (secondary) | 332.7±4.9° |
| Semi-amplitude (K1) (primary) | 9.400±0.013 km/s |
| Details | |
| 73 Leo A | |
| Mass | 1.55 M☉ |
| Radius | 25.5±3.9 R☉ |
| Luminosity | 195±58 L☉ |
| Surface gravity (log g) | 2.02 cgs |
| Temperature | 4,271±85 K |
| Metallicity [Fe/H] | −0.10 dex |
| Rotation | 2,963 days |
| Rotational velocity (v sin i) | 1.9 km/s |
| Age | 2.7±0.6 Gyr |
| Other designations | |
| n Leonis, BD+14°2367, HD 97907, HIP 55016, HR 4365, WDS J11159+1318, TYC 861-1283-1 | |
| Database references | |
| SIMBAD | data |
73 Leonis (n Leonis) is a binary star in the constellation Leo. At a combined apparent magnitude of +5.32, it is faintly visible to the naked eye in ideal conditions. Parallax measurements by the Gaia spacecraft imply a distance of 460 light-years (142 parsecs).