Eta Leonis
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Leo |
| Right ascension | 10h 07m 19.9519s |
| Declination | +16° 45′ 45.592″ |
| Apparent magnitude (V) | 3.486 |
| Characteristics | |
| Evolutionary stage | Blue supergiant (blue loop) |
| Spectral type | A0 Ib |
| U−B color index | −0.206 |
| B−V color index | −0.026 |
| Astrometry | |
| Radial velocity (Rv) | 1.40 km/s |
| Proper motion (μ) | RA: −2.80 mas/yr Dec.: −1.82 mas/yr |
| Parallax (π) | 2.57±0.16 mas |
| Distance | 1,270 ± 80 ly (390 ± 20 pc) |
| Absolute magnitude (MV) | −5.54 |
| Details | |
| Mass | 10 M☉ |
| Radius | 47 R☉ |
| Luminosity | 19,000 L☉ |
| Surface gravity (log g) | 2.00 cgs |
| Temperature | 9,600 K |
| Metallicity | −0.04 |
| Rotational velocity (v sin i) | 2 km/s |
| Age | 25 Myr |
| Other designations | |
| η Leo, 30 Leonis, HR 3975, BD+17°2171, HD 87737, FK5 379, HIP 49583, SAO 98955, GC 13899 | |
| Database references | |
| SIMBAD | data |
Eta Leonis (η Leo, η Leonis) is a third-magnitude blue supergiant star in the constellation Leo, about 1,270 light years away.