Kappa Coronae Borealis

κ Coronae Borealis
Location of κ Coronae Borealis (circled)
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Corona Borealis
Right ascension 15h 51m 13.9315s[1]
Declination +35° 39′ 26.5647″[1]
Apparent magnitude (V) +4.79[2]
Characteristics
Spectral type K0 III-IV[2]
Astrometry
Proper motion (μ) RA: −8.792±0.177[1] mas/yr
Dec.: −347.766±0.202[1] mas/yr
Parallax (π)33.2328 ± 0.1083 mas[1]
Distance98.1 ± 0.3 ly
(30.09 ± 0.10 pc)
Absolute magnitude (MV)+2.37[3]
Details[4]
Mass1.32±0.10 M☉
Radius4.77±0.07 R☉
Luminosity11.6±0.3 L☉
Surface gravity (log g)3.15±0.14 cgs
Temperature4,870±47 K
Metallicity [Fe/H]+0.13±0.03 dex
Other designations
κ CrB, 11 CrB, HD 142091, HIP 77655, HR 5901, SAO 64948[5]
Database references
SIMBADdata

Kappa Coronae Borealis, Latinized from κ Coronae Borealis, is a star approximately 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 orange K-type subgiant star of spectral type K1IV, meaning it has almost completely exhausted its hydrogen supply in 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.[6]

  1. ^ a b c d e Cite error: The named reference Gaia DR2 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference Sato2012 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference White2018 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Simbad was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Bonsor13 was invoked but never defined (see the help page).