88 Leonis
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Leo |
| Right ascension | 11h 31m 44.94461s |
| Declination | +14° 21′ 52.2131″ |
| Apparent magnitude (V) | 6.27 + 9.22 |
| Characteristics | |
| Spectral type | F9.5V + G5 |
| B−V color index | 0.570 |
| Astrometry | |
| Radial velocity (Rv) | −4.81±0.09 km/s |
| Proper motion (μ) | RA: −330.279 mas/yr Dec.: −190.081 mas/yr |
| Parallax (π) | 42.2619±0.0812 mas |
| Distance | 77.2 ± 0.1 ly (23.66 ± 0.05 pc) |
| Absolute magnitude (MV) | 4.46 |
| Details | |
| 88 Leo A | |
| Mass | 1.06 M☉ |
| Radius | 1.10+0.03 −0.05 R☉ |
| Luminosity | 1.470±0.004 L☉ |
| Surface gravity (log g) | 4.25 cgs |
| Temperature | 6,060+140 −76 K |
| Metallicity [Fe/H] | −0.06±0.02 dex |
| Rotation | 14.32 days |
| Age | 5.7+1.6 −3.1 Gyr |
| 88 Leo B | |
| Mass | 0.74 M☉ |
| Other designations | |
| STF 1547 AB, 88 Leonis, BD+15°2345, HD 100180, HIP 56242, HR 4437, WDS J11317+1422, Wolf 401 | |
| 88 Leo A: AG+14°1209, GJ 3669, SAO 99648, LTT 13145 | |
| 88 Leo B: AG+14°1208, GJ 3670, SAO 99647, LTT 13146 | |
| Database references | |
| SIMBAD | data |
88 Leonis is a wide binary star system in the equatorial constellation of Leo, the lion. The system is near the lower limit of visibility to the naked eye with an apparent visual magnitude of 6.27. It is located at a distance of 77 light years from the Sun based on parallax, but is drifting closer with a radial velocity of −4.8 km/s. It has a relatively high proper motion, traversing the celestial sphere at the rate of 0.379 arc seconds per annum.
The primary member of the system, component A, is a yellow-white hued F-type main-sequence star with a stellar classification of F9.5V. It is an estimated 5.7 billion years old and is spinning with a rotation period of 14.3 days. The star has a short magnetic activity cycle that averages around 3.5 years. A second cycle appears to vary over time, lasting 13.7 years at the start of observations then decreasing to 8.6 years over a span of 34 years of measurement. The star has 1.06 times the mass of the Sun and 1.10 times the Sun's radius. It is radiating 1.47 times the luminosity of the Sun from its photosphere at an effective temperature of 6,060 K.
The secondary, component B, is a magnitude 9.22 star at an angular separation of 15.46″ from the primary along a position angle of 326°. It has a class of G5 and 74% of the Sun's mass. The pair share a common proper motion through space with a projected separation of 360.6 AU.