Theta Leonis
Binary star system in the constellation Leo / From Wikipedia, the free encyclopedia
Theta Leonis, Latinized from θ Leonis, formally named Chertan,[10] is a star in the constellation of Leo. With an apparent visual magnitude of +3.324[2] it is visible to the naked eye and forms one of the brighter stars in the constellation. The distance from the Sun can be directly determined from parallax measurements, yielding a value of about 165 light-years (51 parsecs).[1]
Quick Facts Constellation, Right ascension ...
Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Leo |
Right ascension | 11h 14m 14.40446s[1] |
Declination | +15° 25′ 46.4541″[1] |
Apparent magnitude (V) | +3.324[2] |
Characteristics | |
Spectral type | A2 V[3] |
U−B color index | +0.07[2] |
B−V color index | –0.02[2] |
Astrometry | |
Radial velocity (Rv) | +7.6[4] km/s |
Proper motion (μ) | RA: -60.31[1] mas/yr Dec.: -79.10[1] mas/yr |
Parallax (π) | 19.76 ± 0.17 mas[1] |
Distance | 165 ± 1 ly (50.6 ± 0.4 pc) |
Absolute magnitude (MV) | −0.19[5] |
Details | |
Mass | 2.5[6] M☉ |
Luminosity | 141[6] L☉ |
Surface gravity (log g) | 3.65[7] cgs |
Temperature | 9,350[7] K |
Metallicity [Fe/H] | +0.05[7] dex |
Rotational velocity (v sin i) | 23[8] km/s |
Age | 550[7] Myr |
Other designations | |
Database references | |
SIMBAD | data |
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