Delta Leonis
Delta Leonis (δ Leonis, abbreviated Delta Leo, δ Leo), also named Zosma /ˈzɒzmə/, is a star in the zodiac constellation of Leo. Based upon parallax measurements, it lies at a distance of about 58.4 light-years (17.9 parsecs) from the Sun.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Leo |
| Right ascension | 11h 14m 06.50142s |
| Declination | 20° 31′ 25.3853″ |
| Apparent magnitude (V) | 2.56 |
| Characteristics | |
| Spectral type | A4 V |
| U−B color index | +0.12 |
| B−V color index | +0.12 |
| Variable type | Delta Scuti |
| Astrometry | |
| Radial velocity (Rv) | −20.2 km/s |
| Proper motion (μ) | RA: +143.42 mas/yr Dec.: −129.88 mas/yr |
| Parallax (π) | 55.82 ± 0.25 mas |
| Distance | 58.4 ± 0.3 ly (17.91 ± 0.08 pc) |
| Absolute magnitude (MV) | +1.29 |
| Details | |
| Mass | 2.2 M☉ |
| Radius | 2.14 ± 0.040 R☉ |
| Luminosity | 15.5 ± 1.8 L☉ |
| Surface gravity (log g) | 3.91 cgs |
| Temperature | 8,296 K |
| Rotational velocity (v sin i) | 180 km/s |
| Age | 0.60–0.75 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
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