AD Leonis
AD Leonis (Gliese 388) is a red dwarf star. It is located relatively near the Sun, at a distance of 16.2 light-years (5.0 parsecs), in the constellation Leo. AD Leonis is a main sequence star with a spectral classification of M3.5V. It is a flare star that undergoes random increases in luminosity.
U, B, V and R light curves for a flare on AD Leonis, adapted from Hawley and Pettersen (1991) | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Leo |
| Right ascension | 10h 19m 36.28082s |
| Declination | +19° 52′ 12.0104″ |
| Apparent magnitude (V) | 9.32 |
| Characteristics | |
| Spectral type | M3.5eV |
| U−B color index | +1.06 |
| B−V color index | +1.54 |
| Variable type | Flare star |
| Astrometry | |
| Radial velocity (Rv) | +10.67±0.21 km/s |
| Proper motion (μ) | RA: –498.620 mas/yr Dec.: –43.428 mas/yr |
| Parallax (π) | 201.4064 ± 0.0296 mas |
| Distance | 16.194 ± 0.002 ly (4.9651 ± 0.0007 pc) |
| Absolute magnitude (MV) | 10.87 |
| Details | |
| Mass | 0.423±0.012 M☉ |
| Radius | 0.4233±0.0057 R☉ |
| Luminosity | 0.02359±0.00011 L☉ |
| Surface gravity (log g) | 5.12±0.12 cgs |
| Temperature | 3,477±23 K |
| Metallicity [Fe/H] | −0.19±0.12 dex |
| Rotation | 2.2270+0.0010 −0.0011 d |
| Rotational velocity (v sin i) | 2.4±1.5 km/s |
| Age | 25-300 Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
AD Leonis Location of AD Leonis in the constellation Leo | |
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