Imaginary Picture of Kepler-89 c
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Exoplanet Name : Kepler-89 c
Alternate Name :
Radius (Rjup / Re): 0.3860 (Rjup) 4.3267 (Rearth)
Mass (Mjup / Me): 0.0490 (Mjup) 15.5790 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0990 (AU) 0.0990 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0285
Orbital Period(Observed/Estimated) 10.42 (Days Obs.) 10.18 (Days Est.)
Star Radiation at Atmospheric Boundary: 349312.2 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1085.0 (K)
Blackbody T 0.3(K) 1019.0 (K)
Blackbody T 0.7(K) 824.5 (K)
Tidally Locked Blackbody T 0.1(K) 1290.3 (K)
Tidally Locked Blackbody T 0.3(K) 1211.8 (K)
Size Class: 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 : KOI-94
Alternate Name : Kepler-89
Star Distance(LY) : 1555.4
Stellar Radius(Rsun) : 1.4 (Rsun Measured)
Stellar Mass(Msun) : 1.2 (Msun Measured) 1.2 (Msun Estimated)
Star Age : 3.9 (GY)
Temperature : 6181 (K)
Spectral type : G0
Metalicity : -0.0
Absolute Magnitude: 4.0
Apparent Magnitude: 12.4
Right Ascension(RA) 297.3333
Declination (DEC) 41.8911
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors "A. Santerne, C. Moutou, M. Tsantaki, F. Bouchy, G. H_brard, V. Adibekyan, J.-M. Almenara, L. Amard, S. C. C. Barros, I. Boisse, A. S. Bonomo, G. Bruno, B. Courcol, M. Deleuil, O. Demangeon, R. F. D_az, T. Guillot, M. Havel, G. Montagnier, A. S. Rajpurohit, J. Rey, N. C. Santos"
Discovery Paper - Title SOPHIE velocimetry of Kepler transit candidates XVII. The physical properties of giant exoplanets within 401 days of period
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Kepler-89+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-89%20c/
Kepler-89 c
Kepler-89 c

  • Kepler-89 c is an exoplanet orbiting the star KOI-94, located about 1555.4 light-years (476.9 pc) away from Solar System. Its discovery was publicly announced on 2012.
  • The host star KOI-94 has apparent magnitude of 12.4, with absolute magnitude of 4.0.
  • It is 1.2 times more massive and 1.4 times bigger compared with our Sun. The surface temperature is 6181 with its spectral types of G0
  • In this planetary system, the extrasolar planet Kepler-89 c orbits around the star KOI-94 every 10.4 days with its orbital distance of 0.10 AU ( 14810189.2 km)
  • (Projected orbit of Kepler-89 c around its host star KOI-94)


  • The Star KOI-94 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.145 AU ( 171237066.7 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.582 AU ( 236694375.8 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.411 AU ( 360669848.3 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 3.548 AU ( 530741481.8 km)
  • Radiation at Planetary Boundary of Kepler-89 c : 349312.20 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star KOI-94)



  • Kopparapu Recent Venus for Star KOI-94 distance : 1.158 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star KOI-94 distance : 1.466 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star KOI-94 distance : 1.416 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star KOI-94 distance : 1.552 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star KOI-94 distance : 2.565 AU
  • Kopparapu Outer Boundary for Early Mars for Star KOI-94 distance : 2.705 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star KOI-94)



  • Original Kopparapu Recent Venus for Star KOI-94 distance : 1.169 AU
  • Original Kopparapu Runaway Greenhouse for Star KOI-94 distance : 1.504 AU
  • Original Kopparapu Moist Greenhouse for Star KOI-94 distance : 1.547 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star KOI-94 distance : 2.611 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star KOI-94 distance : 2.715 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star KOI-94)



    (Position in Stellar Map of star KOI-94 and its Exoplanet Kepler-89 c)



    (Zoomed position in Stellar Map of star KOI-94 and its Exoplanet Kepler-89 c (zoom level 3))