|
Eta (η) is the star just above Regulus |
|
| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Leo |
| Right ascension | 10h 07m 19.9523s[1] |
| Declination | 16° 45′ 45.592″[1] |
| Apparent magnitude (V) | 3.511 [1] |
| Characteristics | |
| Spectral type | A0Ib [1] |
| U−B color index | -0.21 |
| B−V color index | -0.03 [2] |
| Variable type | Eclipsing binary |
| Astrometry | |
| Radial velocity (Rv) | 3.3 [1] km/s |
| Proper motion (μ) | RA: -1.94 [1] mas/yr Dec.: -0.53 [1] mas/yr |
| Parallax (π) | 1.53 ± 0.77[3] mas |
| Distance | approx. 2000 ly (approx. 700 pc) |
| Absolute magnitude (MV) | -5.60 |
| Details | |
| Mass | 10.8 [4] M☉ |
| Radius | 49.7 R☉ |
| Luminosity | 18，800 L☉ |
| Temperature | 9,770 K |
| Metallicity | -0.04 Fe/H[5] |
| Rotation | 23 km/s [6] |
| Age | 3.5×107 [4] years |
| Other designations | |
| Database references | |
| SIMBAD | data |
Eta Leonis (η Leo, η Leonis) is a fourth-magnitude star in the constellation Leo.
Contents |
Eta Leonis is a white supergiant with the stellar classification A0Ib. Though its apparent magnitude is 3.51, making it a relatively dim star to the naked eye, it is 5,600 times more luminous than the Sun,[4] with an absolute magnitude of -5.60. The Hipparcos astrometric data has estimated the distance of Eta Leonis to be roughly 700 parsecs[3] from Earth, or 2,000 light years away.
There is evidence suggesting that Eta Leonis is part of a binary star system.[4]
|
|||||||||||||||||