Kappa Aquarii
Star in the constellation Aquarius / From Wikipedia, the free encyclopedia
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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]
Quick Facts Observation data Epoch J2000 Equinox J2000, Constellation ...
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 |
Close
The two components are designated Kappa Aquarii A (formally named Situla /ˈsɪtjuːlə/, the traditional name for the system)[7] and B.