Eta Aquarii
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| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquarius |
| Right ascension | 22h 35m 21.3806s |
| Declination | -00° 07′ 02.991″ |
| Apparent magnitude (V) | 4.02 |
| Characteristics | |
| Spectral type | B9IV-Vn |
| U-B color index | -0.26 |
| B-V color index | -0.09 |
| Astrometry | |
| Radial velocity (Rv) | -8 km/s |
| Proper motion (μ) | RA: 88.56 mas/yr Dec.: -56.10 mas/yr |
| Parallax (π) | 17.77 ± 0.82 mas |
| Distance | 184 ± 8 ly (56 ± 3 pc) |
| Absolute magnitude (MV) | 3.93 |
| Details | |
| Mass | 18 M☉ |
| Radius | 7 R☉ |
| Luminosity | 20,000 L☉ |
| Temperature | 10,000–30,000 K |
| Metallicity | ? |
| Rotation | 0,0034699336142 Year |
| Age | ? years |
| Other designations | |
| Database references | |
| SIMBAD | data |
Eta Aquarii (η Aqr / η Aquarii) is a star in the constellation Aquarius. It has the occasional proper name Hydria, from the Greek ‘υδρια hudria "water jar".
Eta Aquarii is a blue-white B-type subgiant with an apparent magnitude of +4.04. It is approximately 184 light years from Earth.
Eta Aquarii is near the radiant of the meteor shower called the Eta Aquariids.
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[edit] References
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