Imaginary Picture of Kepler-128 c
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Exoplanet Name : Kepler-128 c
Alternate Name :
Radius (Rjup / Re): 0.1010 (Rjup) 1.1321 (Rearth)
Mass (Mjup / Me): 0.1040 (Mjup) 33.0656 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.1658 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0624
Orbital Period(Observed/Estimated) 22.80 (Days Obs.) 0.00 (Days Est.)
Star Radiation at Atmospheric Boundary: 171073.5 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 907.7 (K)
Blackbody T 0.3(K) 852.4 (K)
Blackbody T 0.7(K) 689.7 (K)
Tidally Locked Blackbody T 0.1(K) 1079.4 (K)
Tidally Locked Blackbody T 0.3(K) 1013.7 (K)
Size Class: Earth-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-128
Alternate Name :
Star Distance(LY) : 1418.1
Stellar Radius(Rsun) : 1.7 (Rsun Measured)
Stellar Mass(Msun) : 1.2 (Msun Measured) 1.2 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 6081 (K)
Spectral type : G0
Metalicity : -0.0
Absolute Magnitude: 3.2
Apparent Magnitude: 11.4
Right Ascension(RA) 282.4922
Declination (DEC) 43.9803
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors "Sam Hadden, Yoram Lithwick"
Discovery Paper - Title Numerical and Analytical Modelling of Transit Time Variations
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Kepler-128+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-128%20c/
Kepler-128 c
Kepler-128 c

  • Kepler-128 c is an exoplanet orbiting the star Kepler-128, located about 1418.1 light-years (434.8 pc) away from Solar System. Its discovery was publicly announced on 2013.
  • The host star Kepler-128 has apparent magnitude of 11.4, with absolute magnitude of 3.2.
  • It is 1.2 times more massive and 1.7 times bigger compared with our Sun. The surface temperature is 6081 with its spectral types of G0
  • In this planetary system, the extrasolar planet Kepler-128 c orbits around the star Kepler-128 every 22.8 days with its orbital distance of 0.17 AU ( 24808541.8 km)
  • (Projected orbit of Kepler-128 c around its host star Kepler-128)


  • The Star Kepler-128 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.342 AU ( 200734920.6 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.855 AU ( 277468118.6 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.826 AU ( 422800009.2 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 4.159 AU ( 622168735.3 km)
  • Radiation at Planetary Boundary of Kepler-128 c : 171073.52 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-128)



  • Kopparapu Recent Venus for Star Kepler-128 distance : 1.365 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-128 distance : 1.729 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-128 distance : 1.670 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-128 distance : 1.830 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-128 distance : 3.031 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-128 distance : 3.197 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-128)



  • Original Kopparapu Recent Venus for Star Kepler-128 distance : 1.376 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-128 distance : 1.775 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-128 distance : 1.820 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-128 distance : 3.085 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-128 distance : 3.208 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-128)



    (Position in Stellar Map of star Kepler-128 and its Exoplanet Kepler-128 c)



    (Zoomed position in Stellar Map of star Kepler-128 and its Exoplanet Kepler-128 c (zoom level 3))