Kappa Aquarii
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| Observation data Epoch J2000 |
|
|---|---|
| Constellation (pronunciation) |
Aquarius |
| Right ascension | 22h 37m 45.381s |
| Declination | -04° 13′ 41.001″ |
| Apparent magnitude (V) | 5.04 |
| Characteristics | |
| Spectral type | K2III |
| U-B color index | 1.16 |
| B-V color index | 1.14 |
| Astrometry | |
| Radial velocity (Rv) | 8.2 km/s |
| Proper motion (μ) | RA: -68.36 mas/yr Dec.: -120.47 mas/yr |
| Parallax (π) | 13.92 ± 0.76 mas |
| Distance | 230 ± 10 ly (72 ± 4 pc) |
| Absolute magnitude (MV) | 6.186 |
| Details | |
| Mass | ? M☉ |
| Radius | ? R☉ |
| Luminosity | ? L☉ |
| Temperature | ? K |
| Metallicity | ? |
| Rotation | ? |
| Age | ? years |
| Visual binary orbit | |
| Companion | κ Aquarii B |
| Semimajor axis (a) | 98.3" |
| Inclination (i) | 247° |
| Other designations | |
| Database references | |
| SIMBAD | data |
Kappa Aquarii (κ Aqr / κ Aquarii) is a binary star in the constellation Aquarius. It also has the traditional name Situla, which derives from a Latin word meaning "water jar".
The primary component, Situla A, has a surface temperature of 4550 K and is classified as an orange K-type giant with a visual magnitude of +5.04. Its companion, Situla B, is located 98.3 arcseconds away and has an apparent magnitude of +8.8. Situla is 234 light years from Earth.
[edit] Components
| NAME | Right ascension | Declination | Apparent magnitude (V) | Database references |
|---|---|---|---|---|
| κ Aquarii B (BD-04 5716B) | 22h 37m 39.5s | -04° 14' 12 | 8.8 | Simbad |
[edit] Reference
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