Epsilon Sagittarii
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| Observation data Epoch J2000 |
|
|---|---|
| Constellation | Sagittarius |
| Right ascension | 18h 24m 10.3s |
| Declination | -34° 23′ 03.5″ |
| Apparent magnitude (V) | 1.79 |
| Spectral Characteristics | |
| Spectral type | B9.5 III |
| U-B color index | -0.13 |
| B-V color index | -0.03 |
| Variable type | ? |
| Astrometry | |
| Radial velocity (Rv) | -15 km/s |
| Proper motion (μ) | RA: -39.61 mas/yr Dec.: -124.05 mas/yr |
| Parallax (π) | 22.55 ± 1.02 mas |
| Distance | 145 ± 7 ly (44 ± 2 pc) |
| Absolute magnitude (MV) | -1.45 |
| Physical Characteristics | |
| Mass | 5 M☉ |
| Radius | 7 R☉ |
| Luminosity | 375 L☉ |
| Temperature | 9,200 K |
| Metallicity | ? |
| Rotation | 140 km/s. |
| Age | ? years |
| Other designations | |
Epsilon Sagittarii (ε Sgr / ε Sagittarii) is a binary star in the constellation Sagittarius. It also has the traditional name Kaus Australis.
It has a faint, 14th magnitude companion, Epsilon Sagittarii B, 32 arcseconds distant.
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