| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Leo |
| Right ascension | 11h31m 44.94461s[1] |
| Declination | +14° 21′ 52.2131″[1] |
| Apparent magnitude (V) | 6.27[2] + 9.22[3] |
| Characteristics | |
| Spectral type | F9.5V[4] + G5[3] |
| B−V color index | 0.570[2] |
| Astrometry | |
| Radial velocity (Rv) | −4.81±0.09[2] km/s |
| Proper motion (μ) | RA: −330.279[1] mas/yr Dec.: −190.081[1] mas/yr |
| Parallax (π) | 42.2619 ± 0.0812 mas[1] |
| Distance | 77.2 ± 0.1 ly (23.66 ± 0.05 pc) |
| Absolute magnitude (MV) | 4.46[2] |
| Details | |
| 88 Leo A | |
| Mass | 1.06[5] M☉ |
| Radius | 1.10+0.03 −0.05[1] R☉ |
| Luminosity | 1.470±0.004[1] L☉ |
| Surface gravity (log g) | 4.25[6] cgs |
| Temperature | 6,060+140 −76[1] K |
| Metallicity [Fe/H] | −0.06±0.02[2] dex |
| Rotation | 14.32 days[7] |
| Age | 5.7+1.6 −3.1[2] Gyr |
| 88 Leo B | |
| Mass | 0.74[8] M☉ |
| Other designations | |
STF 1547 AB, 88 Leonis, BD+15°2345, HD 100180, HIP 56242, HR 4437, WDS J11317+1422, Wolf 401[9] | |
| 88 Leo A: AG+14°1209, GJ 3669, SAO 99648, LTT 13145[9] | |
| 88 Leo B: AG+14°1208, GJ 3670, SAO 99647, LTT 13146[10] | |
| Database references | |
| SIMBAD | data |
88 Leonis is a wide binary[5] star system in the equatorial constellationofLeo, the lion. The system is near the lower limit of visibility to the naked eye with an apparent visual magnitude of 6.27.[2] 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.[2] It has a relatively high proper motion, traversing the celestial sphere at the rate of 0.379 arc seconds per annum.[11]
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.[4] It is an estimated 5.7[2] billion years old and is spinning with a rotation period of 14.3 days.[7] 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.[7] The star has 1.06[5] times the mass of the Sun and 1.10[1] times the Sun's radius. It is radiating 1.47[1] times the luminosity of the Sun from its photosphere at an effective temperature of 6,060 K.[1]
The secondary, component B, is a magnitude 9.22[3] star at an angular separationof15.46″ from the primary along a position angle of 326°.[8] It has a class of G5[3] and 74% of the Sun's mass. The pair share a common proper motion through space with a projected separationof360.6 AU.[8]
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