Imaginary Picture of Kepler-633 c

Display orbital revolution of Kepler-633 c around the hoststar Kepler-633
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Exoplanet Name : Kepler-633 c
Alternate Name : "KOI-645 c, KOI-645.02"
Status : Confirmed
Radius (Rjup / Re): 0.2048 (Rjup) 2.2961 (Rearth)
Mass (Mjup / Me): 0.0180 (Mjup) 5.7151 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.1636 (AU) 0.1636 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0651
Orbital Period(Observed/Estimated) 23.78 (Days Obs.) 23.93 (Days Est.)
Surface Gravity (G Earth) 1.0841
Star Radiation at Atmospheric Boundary: 73374.9 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 734.6 (K)
Blackbody T 0.3(K) 689.8 (K)
Blackbody T 0.7(K) 558.1 (K)
Tidally Locked Blackbody T 0.1(K) 873.5 (K)
Tidally Locked Blackbody T 0.3(K) 820.4 (K)
Size Class: sub-Neptune-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 : Kepler-633
Alternate Name : "2MASS J19405218+4035321, KIC 5374854, KOI-645, WISE J194052.21+403532.3"
Star Distance(LY) : 2219.6
Stellar Radius(Rsun) : 1.1 (Rsun Measured)
Stellar Mass(Msun) : 1.0 (Msun Measured) 1.0 (Msun Estimated)
Star Age : 6.0 (GY)
Temperature : 5899 (K)
Spectral type : G0V
UV portion[%]: 0.3
Visible portion[%]: 1.5
IR portion[%]: 98.2
Metalicity : -0.1
Absolute Magnitude: 3.3
Apparent Magnitude: 12.4
Right Ascension(RA) 295.2174
Declination (DEC) 40.5923
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal
Discovery Paper - URL
SIMBAD LINK
Open Exoplanet Database Link
Kepler-633 c
Kepler-633 c

  • Kepler-633 c is an exoplanet orbiting the star Kepler-633, located about 2219.6 light-years (680.5 pc) away from Solar System. Its discovery was publicly announced on 2017.
  • The host star Kepler-633 has apparent magnitude of 12.4, with absolute magnitude of 3.3.
  • It is 1.0 times more massive and 1.1 times bigger compared with our Sun. The surface temperature is 5899 with its spectral types of G0V
  • In this planetary system, the extrasolar planet Kepler-633 c orbits around the star Kepler-633 every 23.8 days with its orbital distance of 0.16 AU ( 24474211.6 km)
  • (Projected orbit of Kepler-633 c around its host star Kepler-633)


  • The Star Kepler-633 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.867 AU ( 129691867.9 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.198 AU ( 179268053.9 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.826 AU ( 273164842.3 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.687 AU ( 401974032.0 km)
  • Radiation at Planetary Boundary of Kepler-633 c : 73374.89 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-633)



  • Kopparapu Recent Venus for Star Kepler-633 distance : 0.892 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-633 distance : 1.130 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-633 distance : 1.091 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-633 distance : 1.196 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-633 distance : 1.989 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-633 distance : 2.097 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-633)



  • Original Kopparapu Recent Venus for Star Kepler-633 distance : 0.895 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-633 distance : 1.160 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-633 distance : 1.185 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-633 distance : 2.024 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-633 distance : 2.105 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-633)



    (Position in Stellar Map of star Kepler-633 and its Exoplanet Kepler-633 c)



    (Zoomed position in Stellar Map of star Kepler-633 and its Exoplanet Kepler-633 c (zoom level 3))

    (Synthetic Spectrum of star Kepler-633*)
    *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