Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Crux |
Right ascension | 12h 53m 48.91920s[1] |
Declination | −60° 22′ 34.4808″[1] |
Apparent magnitude (V) | 5.98[2] |
Characteristics | |
Spectral type | B3Ia[3] |
U−B color index | −0.58[2] |
B−V color index | +0.22[2] |
Astrometry | |
Radial velocity (Rv) | -3.5[4] km/s |
Proper motion (μ) | RA: −5.046[5] mas/yr Dec.: −1.093[5] mas/yr |
Parallax (π) | 0.4334 ± 0.0481 mas[5] |
Distance | approx. 7,500 ly (approx. 2,300 pc) |
Absolute magnitude (MV) | −7.1[6] |
Details[7] | |
Mass | 23.0 M☉ |
Luminosity | 151,000 L☉ |
Surface gravity (log g) | 2.25 cgs |
Temperature | 16,300 K |
Rotational velocity (v sin i) | 70 km/s |
Other designations | |
Database references | |
SIMBAD | data |
Kappa Crucis (κ Cru, HD 111973) is a spectroscopic binary star in the open cluster NGC 4755, which is also known as the Kappa Crucis Cluster or Jewel Box Cluster.
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