Sigma Aquilae
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| Observation data Equinox J2000.0 |
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|---|---|
| Constellation | Aquila |
| Right ascension | 19h 39m 11.6s |
| Declination | +5° 23' 52" |
| Apparent magnitude (V) | +5.18 |
| Distance | 680 ± 120 ly (208 ± 37 pc) |
| Spectral type | B3V+B3V |
| Other designations | |
Sigma Aquilae (σ Aql / σ Aquilae) is a binary star in the constellation Aquila. It is approximately 680 light years from Earth.
Sigma Aquilae is an eclipsing spectroscopic binary. Both components are detached blue-white B-type main sequence dwarfs which do not fill their Roche lobes. The mean apparent magnitude of the binary is +5.18. Because it is an eclipsing binary, σ Aquilae is also a variable star and its brightness varies by 0.2 magnitudes with a period equal to its orbital period of 1.95 days.
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