Imaginary Picture of kappa CrB b

Display orbital revolution of kappa CrB b around the hoststar kappa CrB
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Exoplanet Name : kappa CrB b
Alternate Name : kap CrB b
Status : Confirmed
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 1.6000 (Mjup) 508.7008 (Mearth)
Semi Major Axis / Orbital Distance Calculated 2.6000 (AU) 2.6000 (AU Est.)
Eccentricity : 0.0730
Orbital Period(Yrs) 3.4250
Orbital Period(Observed/Estimated) 1251.00 (Days Obs.) 1246.13 (Days Est.)
Surface Gravity (G Earth) 4.9127
Star Radiation at Atmospheric Boundary: 2744.9 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 323.1 (K)
Blackbody T 0.3(K) 303.4 (K)
Blackbody T 0.7(K) 245.5 (K)
Tidally Locked Blackbody T 0.1(K) 384.2 (K)
Tidally Locked Blackbody T 0.3(K) 360.8 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Radial Velocity
Mass Detection : Radial Velocity
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : kappa CrB
Alternate Name : kap CrB
Star Distance(LY) : 99.5
Stellar Radius(Rsun) : 5.0 (Rsun Measured)
Stellar Mass(Msun) : 1.5 (Msun Measured) 1.5 (Msun Estimated)
Star Age : 2.5 (GY)
Temperature : 4960 (K)
Spectral type : K1IVa
UV portion[%]: 3.0
Visible portion[%]: 36.7
IR portion[%]: 60.3
Metalicity : 0.1
Absolute Magnitude: 2.4
Apparent Magnitude: 4.8
Right Ascension(RA) 237.8080
Declination (DEC) 35.6575
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors "Bowler,rendan.; Johnson,ohnsher; Marcy,eoffrey.; Henry,regory.; Peek,athryn..; Fischer,ebra.; Clubb,elsey.; Liu,ichael.; Reffert,abine; Schwab,hristian; Lowe,homas."
Discovery Paper - Title Retired A Stars and Their Companions. III. Comparing the Mass-Period Distributions of Planets Around A-Type Stars and Sun-Like Stars
Discovery Paper - Journal "The Astrophysical Journal,olume 709,umber 1"
Discovery Paper - URL http://iopscience.iop.org/article/10.1088/0004-637X/709/1/396/meta
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=kappa+CrB+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/kappa%20CrB%20b/
kappa CrB b
kappa CrB b

  • kappa CrB b is an exoplanet orbiting the star kappa CrB, located about 99.5 light-years (30.5 pc) away from Solar System. Its discovery was publicly announced on 2007.
  • The host star kappa CrB has apparent magnitude of 4.8, with absolute magnitude of 2.4.
  • It is 1.5 times more massive and 5.0 times bigger compared with our Sun. The surface temperature is 4960 with its spectral types of K1IVa
  • In this planetary system, the extrasolar planet kappa CrB b orbits around the star kappa CrB every 1251.0 days with its orbital distance of 2.60 AU ( 388954463.8 km)
  • (Projected orbit of kappa CrB b around its host star kappa CrB)


  • The Star kappa CrB 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 2.665 AU ( 398649725.9 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 3.683 AU ( 551038100.8 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 5.613 AU ( 839660121.1 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 8.259 AU ( 1235596651.3 km)
  • Radiation at Planetary Boundary of kappa CrB b : 2744.89 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star kappa CrB)



  • Kopparapu Recent Venus for Star kappa CrB distance : 2.888 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star kappa CrB distance : 3.657 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star kappa CrB distance : 3.532 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star kappa CrB distance : 3.876 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star kappa CrB distance : 6.638 AU
  • Kopparapu Outer Boundary for Early Mars for Star kappa CrB distance : 7.002 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star kappa CrB)



  • Original Kopparapu Recent Venus for Star kappa CrB distance : 2.857 AU
  • Original Kopparapu Runaway Greenhouse for Star kappa CrB distance : 3.769 AU
  • Original Kopparapu Moist Greenhouse for Star kappa CrB distance : 3.780 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star kappa CrB distance : 6.750 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star kappa CrB distance : 7.019 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star kappa CrB)



    (Position in Stellar Map of star kappa CrB and its Exoplanet kappa CrB b)



    (Zoomed position in Stellar Map of star kappa CrB and its Exoplanet kappa CrB b (zoom level 3))

    (Synthetic Spectrum of star kappa CrB*)
    *Yamashiki YA et al. 2019 ApJ 881 114
    MUSCLES Paper I - France et al. 2016 ApJ 820 89
    MUSCLES Paper II- Youngblood et al. 2016 ApJ 824 101
    MUSCLES Paper III- Loyd et al. 2016 ApJ 824 102