Delta Leonis
Binary star system in the constellation Leo / From Wikipedia, the free encyclopedia
Delta Leonis (δ Leonis, abbreviated Delta Leo, δ Leo), also named Zosma /ˈzɒzmə/,[12][13] 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.[1]
Quick Facts Observation data Epoch J2000 Equinox J2000, Constellation ...
Observation data Epoch J2000 Equinox J2000 | |
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Constellation | Leo |
Right ascension | 11h 14m 06.50142s[1] |
Declination | 20° 31′ 25.3853″[1] |
Apparent magnitude (V) | 2.56[2] |
Characteristics | |
Spectral type | A4 V[3] |
U−B color index | +0.12[4] |
B−V color index | +0.12[4] |
Variable type | Delta Scuti |
Astrometry | |
Radial velocity (Rv) | −20.2[2] km/s |
Proper motion (μ) | RA: +143.42[1] mas/yr Dec.: −129.88[1] mas/yr |
Parallax (π) | 55.82 ± 0.25 mas[1] |
Distance | 58.4 ± 0.3 ly (17.91 ± 0.08 pc) |
Absolute magnitude (MV) | +1.29[5] |
Details | |
Mass | 2.2[6] M☉ |
Radius | 2.14 ± 0.040[7] R☉ |
Luminosity | 15.5 ± 1.8[7] L☉ |
Surface gravity (log g) | 3.91[8] cgs |
Temperature | 8,296[7] K |
Rotational velocity (v sin i) | 180[9] km/s |
Age | 0.60–0.75[6] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
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