Imaginary Picture of CoRoT-8 b

Display orbital revolution of CoRoT-8 b around the hoststar CoRoT-8
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Exoplanet Name : CoRoT-8 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.5692 (Rjup) 6.3802 (Rearth)
Mass (Mjup / Me): 0.2158 (Mjup) 68.6110 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0630 (AU) 0.0630 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0170
Orbital Period(Observed/Estimated) 6.21 (Days Obs.) 6.16 (Days Est.)
Surface Gravity (G Earth) 1.6855
Star Radiation at Atmospheric Boundary: 122000.1 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 834.1 (K)
Blackbody T 0.3(K) 783.3 (K)
Blackbody T 0.7(K) 633.8 (K)
Tidally Locked Blackbody T 0.1(K) 992.0 (K)
Tidally Locked Blackbody T 0.3(K) 931.5 (K)
Size Class: sub-Jupiter-size
Mass Class:
Detection Type : Primary Transit
Mass Detection : TTV
Radius Detection : Primary Transit
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : CoRoT-8
Alternate Name :
Star Distance(LY) : 1239.4
Stellar Radius(Rsun) : 0.8 (Rsun Measured)
Stellar Mass(Msun) : 0.9 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 3.0 (GY)
Temperature : 5080 (K)
Spectral type : K1V
UV portion[%]: 3.8
Visible portion[%]: 38.1
IR portion[%]: 58.1
Metalicity : 0.3
Absolute Magnitude: 6.9
Apparent Magnitude: 14.8
Right Ascension(RA) 291.5885
Declination (DEC) 1.4267
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors CUTRI R.M.; SKRUTSKIE M.F.; VAN DYK S.; BEICHMAN C.A.; CARPENTER J.M.; CHESTER T.; CAMBRESY L.; EVANS T.; FOWLER J.; GIZIS J.; HOWARD E.; HUCHRA J.; JARRETT T.; KOPAN E.L.; KIRKPATRICK J.D.; LIGHT R.M.; MARSH K.A.; McCALLON H.; SCHNEIDER S.; STIENING R.; SYKES M.; WEINBERG M.; WHEATON W.A.; WHEELOCK S.; ZACARIAS N.
Discovery Paper - Title 2MASS All Sky Catalog of point sources.
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=CoRoT-8+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/CoRoT-8%20b/
CoRoT-8 b
CoRoT-8 b

  • CoRoT-8 b is an exoplanet orbiting the star CoRoT-8, located about 1239.4 light-years (380.0 pc) away from Solar System. Its discovery was publicly announced on 2010.
  • The host star CoRoT-8 has apparent magnitude of 14.8, with absolute magnitude of 6.9.
  • It is 0.9 times more massive and 0.8 times bigger compared with our Sun. The surface temperature is 5080 with its spectral types of K1V
  • In this planetary system, the extrasolar planet CoRoT-8 b orbits around the star CoRoT-8 every 6.2 days with its orbital distance of 0.06 AU ( 9424665.9 km)
  • (Projected orbit of CoRoT-8 b around its host star CoRoT-8)


  • The Star CoRoT-8 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.430 AU ( 64398575.7 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.595 AU ( 89015661.0 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.907 AU ( 135640168.2 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.334 AU ( 199600449.5 km)
  • Radiation at Planetary Boundary of CoRoT-8 b : 122000.05 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star CoRoT-8)



  • Kopparapu Recent Venus for Star CoRoT-8 distance : 0.464 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star CoRoT-8 distance : 0.587 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star CoRoT-8 distance : 0.567 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star CoRoT-8 distance : 0.622 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star CoRoT-8 distance : 1.061 AU
  • Kopparapu Outer Boundary for Early Mars for Star CoRoT-8 distance : 1.119 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star CoRoT-8)



  • Original Kopparapu Recent Venus for Star CoRoT-8 distance : 0.459 AU
  • Original Kopparapu Runaway Greenhouse for Star CoRoT-8 distance : 0.605 AU
  • Original Kopparapu Moist Greenhouse for Star CoRoT-8 distance : 0.608 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star CoRoT-8 distance : 1.079 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star CoRoT-8 distance : 1.122 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star CoRoT-8)



    (Position in Stellar Map of star CoRoT-8 and its Exoplanet CoRoT-8 b)



    (Zoomed position in Stellar Map of star CoRoT-8 and its Exoplanet CoRoT-8 b (zoom level 3))

    (Synthetic Spectrum of star CoRoT-8*)
    *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