Sigma Aquarii
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| Observation data Epoch J2000 |
|
|---|---|
| Constellation (pronunciation) |
Aquarius |
| Right ascension | 22h 30m 38.8161s |
| Declination | -10° 40′ 40.62″ |
| Apparent magnitude (V) | 4.825 |
| Characteristics | |
| Spectral type | A0IVs |
| U-B color index | -0.11 |
| B-V color index | -0.06 |
| Astrometry | |
| Radial velocity (Rv) | 11 km/s |
| Proper motion (μ) | RA: 1.79 mas/yr Dec.: -26.26 mas/yr |
| Parallax (π) | 12.29 ± 1.32 mas |
| Distance | approx. 270 ly (approx. 81 pc) |
| Absolute magnitude (MV) | 4.79 |
| Details | |
| Mass | ? M☉ |
| Radius | ? R☉ |
| Luminosity | ? L☉ |
| Temperature | ? K |
| Metallicity | ? |
| Rotation | ? |
| Age | ? years |
| Visual binary orbit | |
| Companion | σ Aquarii B |
| Period (P) | 1.79 yr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Sigma Aquarii (σ Aqr / σ Aquarii) is a binary star in the constellation Aquarius. It is approximately 265 light years from Earth.
Sigma Aquarii is an astrometric binary. The visible component is a white A-type subgiant with an apparent magnitude of +4.82. The orbital period of the binary is 654 days.
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