| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Aquarius |
| Right ascension | 23h 16m 50.9395s |
| Declination | −07° 43′ 35.413″ |
| Apparent magnitude (V) | 5.01 |
| Characteristics | |
| Spectral type | M3III |
| U−B color index | 1.6 |
| B−V color index | 1.6 |
| Variable type | Variable star |
| Astrometry | |
| Radial velocity (Rv) | -15.1 km/s |
| Proper motion (μ) | RA: -18.66 mas/yr Dec.: -15.43 mas/yr |
| Parallax (π) | 5.09 ± 0.96 mas |
| Distance | approx. 600 ly (approx. 200 pc) |
| Absolute magnitude (MV) | 6.56 |
| Details | |
| Mass | 0,4 M☉ |
| Radius | 0,5 R☉ |
| Luminosity | 0,04 L☉ |
| Temperature | 2,000–3,500 K |
| Metallicity | ? |
| Rotation | ? |
| Age | ? years |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Data sources: | |
| Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.) |
|
Chi Aquarii (χ Aqr, χ Aquarii) is a star in the constellation Aquarius.
Chi Aquarii is a M-type red giant with a mean apparent magnitude of +4.93. It is approximately 640 light years from Earth. It is classified as an irregular variable star and its brightness varies from magnitude +4.90 to +5.06.
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