![]() ![]() Epsilon Sagittarii (circled) in the constellation Sagittarius. |
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Observation data Epoch J2000 Equinox J2000 |
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Constellation | Sagittarius |
Right ascension | 18 |
Declination | –34° 23′ 04.6193″ |
Apparent magnitude (V) | +1.85 |
Characteristics | |
Spectral type | B9.5 III |
U−B color index | +0.13 |
B−V color index | –0.03 |
Astrometry | |
Radial velocity (Rv) | –15 km/s |
Proper motion (μ) | RA: –39.42 mas/yr |
Parallax (π) | 22.76 ± 0.24mas |
Distance | 143 ± 2 ly (43.9 ± 0.5 pc) |
Absolute magnitude (MV) | –1.41 |
Details | |
ε Sgr A | |
Mass | 3.515 ± 0.138M☉ |
Radius | 6.8R☉ |
Luminosity | 363L☉ |
Surface gravity (log g) | 4.50 |
Temperature | 9,960K |
Rotational velocity (v sin i) | 236 km/s |
Age | 232Myr |
ε Sgr B | |
Mass | 0.95M☉ |
Luminosity | 0.89L☉ |
Temperature | 5,807K |
Other designations | |
Kaus Australis, 20 Sagittarii, FK5 689, HD 169022, HIP 90185, HR 6879, SAO 210091.
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