Epsilon Scorpii
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Scorpius |
| ε Sco A | |
| Right ascension | 16h 50m 09.8s |
| Declination | −34° 17′ 36″ |
| Apparent magnitude (V) | 2.24 - 2.35 |
| ε Sco B | |
| Right ascension | 16h 50m 10.7s |
| Declination | −34° 17′ 44″ |
| Characteristics | |
| ε Sco A | |
| Evolutionary stage | Horizontal branch |
| Spectral type | K1 III |
| U−B color index | +1.147 |
| B−V color index | +1.150 |
| Variable type | suspected |
| Astrometry | |
| ε Sco A | |
| Radial velocity (Rv) | −2.5 km/s |
| Proper motion (μ) | RA: −614.85 mas/yr Dec.: −255.98 mas/yr |
| Parallax (π) | 51.19±0.22 mas |
| Distance | 63.7 ± 0.3 ly (19.54 ± 0.08 pc) |
| Absolute magnitude (MV) | 0.78±0.04 |
| ε Sco B | |
| Proper motion (μ) | RA: −611.794 mas/yr Dec.: −261.515 mas/yr |
| Parallax (π) | 50.4231±0.0326 mas |
| Distance | 64.68 ± 0.04 ly (19.83 ± 0.01 pc) |
| Details | |
| ε Sco A | |
| Mass | 1.41±0.09 M☉ |
| Radius | 12.91±0.25 R☉ |
| Luminosity | 60 L☉ |
| Surface gravity (log g) | 2.34 cgs |
| Temperature | 4,522±28 K |
| Metallicity [Fe/H] | −0.17 dex |
| Rotational velocity (v sin i) | 2.6±0.5 km/s |
| Age | 3.92+0.55 −0.54 Gyr |
| ε Sco B | |
| Mass | 0.262±0.021 M☉ |
| Radius | 0.288±0.019 R☉ |
| Luminosity | (9.30±0.25)×10−3 L☉ |
| Temperature | 3,359±112 K |
| Other designations | |
| Wei, Larawag, 26 Scorpii, CD−34 11285, FK5 628, GCTP 3823.00, Gl 639.1, GJ 9579, HD 151680, HIP 82396, HR 6241, LHS 3244, SAO 208078 | |
| Database references | |
| SIMBAD | A |
| B | |
Epsilon Scorpii is a binary star in the southern zodiac constellation of Scorpius. The primary component has the proper name Larawag /ˈlærəwæɡ/. It has an apparent visual magnitude of around +2.3, making it the fifth-brightest member of the constellation. Parallax measurements made during the Hipparcos mission provide a measured distance of 63.7 light-years (19.5 parsecs).