Imaginary Picture of CoRoT-18 b

Display orbital revolution of CoRoT-18 b around the hoststar CoRoT-18
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Exoplanet Name : CoRoT-18 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 1.3100 (Rjup) 14.6838 (Rearth)
Mass (Mjup / Me): 3.4700 (Mjup) 1103.2449 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0295 (AU) 0.0295 (AU Est.)
Eccentricity : 0.0800
Orbital Period(Yrs) 0.0052
Orbital Period(Observed/Estimated) 1.90 (Days Obs.) 1.90 (Days Est.)
Surface Gravity (G Earth) 5.1168
Star Radiation at Atmospheric Boundary: 1234117.1 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1487.6 (K)
Blackbody T 0.3(K) 1397.0 (K)
Blackbody T 0.7(K) 1130.3 (K)
Tidally Locked Blackbody T 0.1(K) 1769.0 (K)
Tidally Locked Blackbody T 0.3(K) 1661.3 (K)
Size Class: Super-Jupiter-size
Mass Class:
Detection Type : Primary Transit
Mass Detection :
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : CoRoT-18
Alternate Name :
Star Distance(LY) : 2837.6
Stellar Radius(Rsun) : 1.0 (Rsun Measured)
Stellar Mass(Msun) : 0.9 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5440 (K)
Spectral type : G9V
UV portion[%]: 6.6
Visible portion[%]: 42.8
IR portion[%]: 50.6
Metalicity : -0.1
Absolute Magnitude: 5.3
Apparent Magnitude: 15.0
Right Ascension(RA) 98.1724
Declination (DEC) 0.0314
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-18+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/CoRoT-18%20b/
CoRoT-18 b
CoRoT-18 b

  • CoRoT-18 b is an exoplanet orbiting the star CoRoT-18, located about 2837.6 light-years (870.0 pc) away from Solar System. Its discovery was publicly announced on 2011.
  • The host star CoRoT-18 has apparent magnitude of 15.0, with absolute magnitude of 5.3.
  • It is 0.9 times more massive and 1.0 times bigger compared with our Sun. The surface temperature is 5440 with its spectral types of G9V
  • In this planetary system, the extrasolar planet CoRoT-18 b orbits around the star CoRoT-18 every 1.9 days with its orbital distance of 0.03 AU ( 4413137.2 km)
  • (Projected orbit of CoRoT-18 b around its host star CoRoT-18)


  • The Star CoRoT-18 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.641 AU ( 95908237.9 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.886 AU ( 132570248.6 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.350 AU ( 202007721.1 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.987 AU ( 297263211.0 km)
  • Radiation at Planetary Boundary of CoRoT-18 b : 1234117.12 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star CoRoT-18)



  • Kopparapu Recent Venus for Star CoRoT-18 distance : 0.678 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star CoRoT-18 distance : 0.858 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star CoRoT-18 distance : 0.829 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star CoRoT-18 distance : 0.909 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star CoRoT-18 distance : 1.531 AU
  • Kopparapu Outer Boundary for Early Mars for Star CoRoT-18 distance : 1.615 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star CoRoT-18)



  • Original Kopparapu Recent Venus for Star CoRoT-18 distance : 0.674 AU
  • Original Kopparapu Runaway Greenhouse for Star CoRoT-18 distance : 0.883 AU
  • Original Kopparapu Moist Greenhouse for Star CoRoT-18 distance : 0.892 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star CoRoT-18 distance : 1.557 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star CoRoT-18 distance : 1.619 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star CoRoT-18)



    (Position in Stellar Map of star CoRoT-18 and its Exoplanet CoRoT-18 b)



    (Zoomed position in Stellar Map of star CoRoT-18 and its Exoplanet CoRoT-18 b (zoom level 3))

    (Synthetic Spectrum of star CoRoT-18*)
    *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