Imaginary Picture of eps CrB b

Display orbital revolution of eps CrB b around the hoststar eps CrB
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Exoplanet Name : eps CrB b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 6.7000 (Mjup) 2130.1846 (Mearth)
Semi Major Axis / Orbital Distance Calculated 1.3000 (AU) 1.3000 (AU Est.)
Eccentricity : 0.1100
Orbital Period(Yrs) 1.1441
Orbital Period(Observed/Estimated) 417.90 (Days Obs.) 415.22 (Days Est.)
Surface Gravity (G Earth) 20.5719
Star Radiation at Atmospheric Boundary: 120596.5 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 831.7 (K)
Blackbody T 0.3(K) 781.1 (K)
Blackbody T 0.7(K) 632.0 (K)
Tidally Locked Blackbody T 0.1(K) 989.1 (K)
Tidally Locked Blackbody T 0.3(K) 928.9 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Radial Velocity
Mass Detection :
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : eps CrB
Alternate Name :
Star Distance(LY) : 221.4
Stellar Radius(Rsun) : 21.0 (Rsun Measured)
Stellar Mass(Msun) : 1.7 (Msun Measured) 1.7 (Msun Estimated)
Star Age : 1.7 (GY)
Temperature : 4406 (K)
Spectral type : K2III
UV portion[%]: 1.3
Visible portion[%]: 29.5
IR portion[%]: 69.3
Metalicity : -0.1
Absolute Magnitude: -0.0
Apparent Magnitude: 4.1
Right Ascension(RA) 239.3969
Declination (DEC) 26.8778
Hubble Space Telescope Guide Star Catalog (GSC) ID 02037-01826
Discovered by
Discovery Paper - Authors 0
Discovery Paper - Title 0
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=eps+CrB+&submit=SIMBAD+search
Open Exoplanet Database Link 0
eps CrB b
eps CrB b

  • eps CrB b is an exoplanet orbiting the star eps CrB, located about 221.4 light-years (67.9 pc) away from Solar System. Its discovery was publicly announced on 2012.
  • The host star eps CrB has apparent magnitude of 4.1, with absolute magnitude of -0.0.
  • It is 1.7 times more massive and 21.0 times bigger compared with our Sun. The surface temperature is 4406 with its spectral types of K2III
  • In this planetary system, the extrasolar planet eps CrB b orbits around the star eps CrB every 417.9 days with its orbital distance of 1.30 AU ( 194477231.9 km)
  • (Projected orbit of eps CrB b around its host star eps CrB)


  • The Star eps CrB 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 8.832 AU ( 1321193391.8 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 12.208 AU ( 1826234536.6 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 18.602 AU ( 2782777289.0 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 27.373 AU ( 4094978686.4 km)
  • Radiation at Planetary Boundary of eps CrB b : 120596.49 W/m2

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



  • Kopparapu Recent Venus for Star eps CrB distance : 9.786 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star eps CrB distance : 12.387 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star eps CrB distance : 11.964 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star eps CrB distance : 13.142 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star eps CrB distance : 23.046 AU
  • Kopparapu Outer Boundary for Early Mars for Star eps CrB distance : 24.311 AU

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



  • Original Kopparapu Recent Venus for Star eps CrB distance : 9.655 AU
  • Original Kopparapu Runaway Greenhouse for Star eps CrB distance : 12.792 AU
  • Original Kopparapu Moist Greenhouse for Star eps CrB distance : 12.775 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star eps CrB distance : 23.420 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star eps CrB distance : 24.356 AU

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



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



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

    (Synthetic Spectrum of star eps 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