Imaginary Picture of Kepler-68 c

Display orbital revolution of Kepler-68 c around the hoststar Kepler-68
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Exoplanet Name : Kepler-68 c
Alternate Name : "2MASS J19240775+4902249 c, K00246.02, KIC 11295426 c, KOI-246 c, KOI-246.02, Kepler-68 A c, TYC 3551-189-1 c, WISE J192
Status : Confirmed
Radius (Rjup / Re): 0.0827 (Rjup) 0.9270 (Rearth)
Mass (Mjup / Me): 0.0064 (Mjup) 2.0412 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0906 (AU) 0.0906 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0263
Orbital Period(Observed/Estimated) 9.61 (Days Obs.) 9.58 (Days Est.)
Surface Gravity (G Earth) 2.3754
Star Radiation at Atmospheric Boundary: 265172.8 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1012.8 (K)
Blackbody T 0.3(K) 951.1 (K)
Blackbody T 0.7(K) 769.6 (K)
Tidally Locked Blackbody T 0.1(K) 1204.4 (K)
Tidally Locked Blackbody T 0.3(K) 1131.1 (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-68
Alternate Name : "2MASS J19240775+4902249, KIC 11295426, KOI-246, Kepler-68 A, TYC 3551-189-1, WISE J192407.75+490224.8"
Star Distance(LY) : 485.4
Stellar Radius(Rsun) : 1.3 (Rsun Measured)
Stellar Mass(Msun) : 1.1 (Msun Measured) 1.1 (Msun Estimated)
Star Age : 6.3 (GY)
Temperature : 5789 (K)
Spectral type : G2
UV portion[%]: 7.8
Visible portion[%]: 44.8
IR portion[%]: 47.4
Metalicity : 0.1
Absolute Magnitude: 3.1
Apparent Magnitude: 9.0
Right Ascension(RA) 291.0323
Declination (DEC) 49.0403
Hubble Space Telescope Guide Star Catalog (GSC) ID 03551-00189
Discovered by
Discovery Paper - Authors "Gilliland,onald.; Marcy,eoffrey.; Rowe,ason.; Rogers,eslie; Torres,uillermo; Fressin,rancois; Lopez,ric.; Buchhave,ars.; Christensen-Dalsgaard,_rgen; D_sert,ean-Michel; Henze,hristopher.; Isaacson,oward; Jenkins,on.; Lissauer,ack.; Chaplin,illiam.; Basu,arbani; Metcalfe,ravis.; Elsworth,vonne; Handberg,asmus; Hekker,askia; Huber,aniel; Karoff,hristoffer; Kjeldsen,ans; Lund,ikkel.; Lundkvist,ia; Miglio,ndrea; Charbonneau,avid; Ford,ric.; Fortney,onathan.; Haas,ichael.; Howard,ndrew.; Howell,teve.; Ragozzine,arin; Thompson,usan."
Discovery Paper - Title "Kepler-68: Three Planets, One with a Density between that of Earth and Ice Giants"
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Kepler-68+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-68%20c/
Kepler-68 c
Kepler-68 c

  • Kepler-68 c is an exoplanet orbiting the star Kepler-68, located about 485.4 light-years (148.8 pc) away from Solar System. Its discovery was publicly announced on 2013.
  • The host star Kepler-68 has apparent magnitude of 9.0, with absolute magnitude of 3.1.
  • It is 1.1 times more massive and 1.3 times bigger compared with our Sun. The surface temperature is 5789 with its spectral types of G2
  • In this planetary system, the extrasolar planet Kepler-68 c orbits around the star Kepler-68 every 9.6 days with its orbital distance of 0.09 AU ( 13552071.1 km)
  • (Projected orbit of Kepler-68 c around its host star Kepler-68)


  • The Star Kepler-68 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.913 AU ( 136521323.3 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.261 AU ( 188708146.1 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.922 AU ( 287549453.6 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.829 AU ( 423141617.8 km)
  • Radiation at Planetary Boundary of Kepler-68 c : 265172.84 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-68)



  • Kopparapu Recent Venus for Star Kepler-68 distance : 0.945 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-68 distance : 1.197 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-68 distance : 1.156 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-68 distance : 1.267 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-68 distance : 2.113 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-68 distance : 2.229 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-68)



  • Original Kopparapu Recent Venus for Star Kepler-68 distance : 0.947 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-68 distance : 1.230 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-68 distance : 1.253 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-68 distance : 2.150 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-68 distance : 2.236 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-68)



    (Position in Stellar Map of star Kepler-68 and its Exoplanet Kepler-68 c)



    (Zoomed position in Stellar Map of star Kepler-68 and its Exoplanet Kepler-68 c (zoom level 3))

    (Synthetic Spectrum of star Kepler-68*)
    *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