Kappa Coronae Borealis
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Corona Borealis |
| Right ascension | 15h 51m 13.9313s |
| Declination | +35° 39′ 26.574″ |
| Apparent magnitude (V) | +4.79 |
| Characteristics | |
| Evolutionary stage | red giant branch |
| Spectral type | K0 III-IV |
| Astrometry | |
| Proper motion (μ) | RA: −8.669 mas/yr Dec.: −348.350 mas/yr |
| Parallax (π) | 33.3433±0.0800 mas |
| Distance | 97.8 ± 0.2 ly (29.99 ± 0.07 pc) |
| Absolute magnitude (MV) | +2.37 |
| Details | |
| Mass | 1.32±0.10 M☉ |
| Radius | 4.77±0.07 R☉ |
| Luminosity | 11.6±0.3 L☉ |
| Surface gravity (log g) | 3.15±0.14 cgs |
| Temperature | 4,870±47 K |
| Metallicity [Fe/H] | +0.13±0.03 dex |
| Other designations | |
| κ CrB, 11 CrB, HD 142091, HIP 77655, HR 5901, SAO 64948 | |
| Database references | |
| SIMBAD | data |
Kappa Coronae Borealis, Latinized from κ Coronae Borealis, is a star 98 light years away in the constellation of Corona Borealis. The apparent magnitude is +4.82 (4.17 trillion times fainter than the Sun) and the absolute magnitude is +2.35 (9.82 times brighter than the Sun). It is an evolved K-type star of spectral type K1IV, meaning it has completely exhausted its hydrogen supply at its core. It is 1.32 times as massive as the Sun yet has brightened to 11.6 times its luminosity. Around 2.5 billion years old, it was formerly an A-type main sequence star.