| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Aquarius |
| Right ascension | 22h 47m 42.7684s |
| Declination | -14° 03′ 23.142″ |
| Apparent magnitude (V) | 5.678 |
| Characteristics | |
| Spectral type | B9V |
| U−B color index | -0.25 |
| B−V color index | -0.05 |
| Astrometry | |
| Radial velocity (Rv) | 15 km/s |
| Proper motion (μ) | RA: 29.03 mas/yr Dec.: -9.44 mas/yr |
| Parallax (π) | 12.55 ± 1.19 mas |
| Distance | 260 ± 20 ly (80 ± 8 pc) |
| Absolute magnitude (MV) | 5.661 |
| Details | |
| Mass | 18 M☉ |
| Radius | 7 R☉ |
| Luminosity | 20,000 L☉ |
| Temperature | 10,000–30,000 K |
| Metallicity | ? |
| Rotation | 0,0136842452391 Year |
| Age | ? years |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Data sources: | |
| Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.) |
|
Tau1 Aquarii (τ1 Aqr, τ1 Aquarii) is a star in the constellation Aquarius. It is approximately 260 light years from Earth.
τ1 Aquarii is a white A-type main sequence dwarf with an apparent magnitude of +5.68.
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