Back Kappa Aquarii Afrikaans Kappa Aquarii AST Kappa d'Aquari Catalan Situla (Stern) German Kappa Aquarii Spanish کاپا دلو Persian Kappa Aquarii French Kappa Aquarii ID Situla (astronomia) Italian みずがめ座カッパ星 Japanese
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| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquarius |
| Right ascension | 22h 37m 45.38049s[1] |
| Declination | −04° 13′ 40.9939″[1] |
| Apparent magnitude (V) | 5.03[2] |
| Characteristics | |
| Spectral type | K2 III[3] |
| U−B color index | +1.16[2] |
| B−V color index | +1.142[4] |
| Astrometry | |
| Radial velocity (Rv) | +7.31 ± 0.16[4] km/s |
| Proper motion (μ) | RA: −69.23[1] mas/yr Dec.: −119.67[1] mas/yr |
| Parallax (π) | 15.25±0.21 mas[1] |
| Distance | 214 ± 3 ly (65.6 ± 0.9 pc) |
| Absolute magnitude (MV) | +0.96[5] |
| Details | |
| Radius | 13[4] R☉ |
| Luminosity | 60[4] L☉ |
| Surface gravity (log g) | 2.5[4] cgs |
| Temperature | 4,581[4] K |
| Metallicity [Fe/H] | +0.14[4] dex |
| Rotational velocity (v sin i) | 3.8[4] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
Kappa Aquarii (κ Aquarii, abbreviated Kappa Aqr, κ Aqr) is a probable binary star in the equatorial constellation of Aquarius. This system is visible to the naked eye, but it is faint at an apparent magnitude of 5.03.[2] Based upon parallax measurements made during the Hipparcos mission, it is around 214 light-years (66 parsecs) from the Sun.[2]
The two components are designated Kappa Aquarii A (formally named Situla /ˈsɪtjuːlə/, the traditional name for the system)[7] and B.
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