Imaginary Picture of Kepler-108 c

Display orbital revolution of Kepler-108 c around the hoststar Kepler-108
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Exoplanet Name : Kepler-108 c
Alternate Name : "Kepler-108 c, 2MASS J19381420+4603443 c, K00119.02, KIC 9471974 c, KOI-119 c, KOI-119.02, Kepler-108 B c, WISE J193814.
Status : Confirmed
Radius (Rjup / Re): 0.7300 (Rjup) 8.1826 (Rearth)
Mass (Mjup / Me): 0.3813 (Mjup) 121.2383 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.7210 (AU) 0.7210 (AU Est.)
Eccentricity : 0.0400
Orbital Period(Yrs) 0.5211
Orbital Period(Observed/Estimated) 190.32 (Days Obs.) 239.74 (Days Est.)
Surface Gravity (G Earth) 1.8108
Star Radiation at Atmospheric Boundary: 10000.0 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 446.3 (K)
Blackbody T 0.3(K) 419.1 (K)
Blackbody T 0.7(K) 339.1 (K)
Tidally Locked Blackbody T 0.1(K) 530.8 (K)
Tidally Locked Blackbody T 0.3(K) 498.4 (K)
Size Class: sub-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 : Kepler-108
Alternate Name : "Kepler-108, 2MASS J19381420+4603443, KIC 9471974, KOI-119, Kepler-108 B, WISE J193814.19+460344.4"
Star Distance(LY) : 1950.5
Stellar Radius(Rsun) : 2.1 (Rsun Measured)
Stellar Mass(Msun) : 0.9 (Msun Measured) 1.4 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5626 (K)
Spectral type : G2
UV portion[%]: 7.8
Visible portion[%]: 44.8
IR portion[%]: 47.4
Metalicity : -0.0
Absolute Magnitude: 2.5
Apparent Magnitude: 11.4
Right Ascension(RA) 294.5592
Declination (DEC) 46.0623
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors "Rowe,ason.; Bryson,tephen.; Marcy,eoffrey.; Lissauer,ack.; Jontof-Hutter,aniel; Mullally,ergal; Gilliland,onald.; Issacson,oward; Ford,ric; Howell,teve.; Borucki,illiam.; Haas,ichael; Huber,aniel; Steffen,ason.; Thompson,usan.; Quintana,lisa; Barclay,homas; Still,artin; Fortney,onathan; Gautier,..,II; Hunter,oger; Caldwell,ouglas.; Ciardi,avid.; Devore,dna; Cochran,illiam; Jenkins,on; Agol,ric; Carter,oshua.; Geary,ohn"
Discovery Paper - Title Validation of Kepler's Multiple Planet Candidates. III. Light Curve Analysis and Announcement of Hundreds of New Multi-planet Systems
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-108%20c/
Kepler-108 c
Kepler-108 c

  • Kepler-108 c is an exoplanet orbiting the star Kepler-108, located about 1950.5 light-years (598.0 pc) away from Solar System. Its discovery was publicly announced on 2014.
  • The host star Kepler-108 has apparent magnitude of 11.4, with absolute magnitude of 2.5.
  • It is 0.9 times more massive and 2.1 times bigger compared with our Sun. The surface temperature is 5626 with its spectral types of G2
  • In this planetary system, the extrasolar planet Kepler-108 c orbits around the star Kepler-108 every 190.3 days with its orbital distance of 0.72 AU ( 107860064.8 km)
  • (Projected orbit of Kepler-108 c around its host star Kepler-108)


  • The Star Kepler-108 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.410 AU ( 211004569.2 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.950 AU ( 291663456.7 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.971 AU ( 444430563.0 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 4.372 AU ( 653999042.8 km)
  • Radiation at Planetary Boundary of Kepler-108 c : 10000.04 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-108)



  • Kopparapu Recent Venus for Star Kepler-108 distance : 1.475 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-108 distance : 1.868 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-108 distance : 1.804 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-108 distance : 1.978 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-108 distance : 3.313 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-108 distance : 3.494 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-108)



  • Original Kopparapu Recent Venus for Star Kepler-108 distance : 1.473 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-108 distance : 1.921 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-108 distance : 1.949 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-108 distance : 3.371 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-108 distance : 3.505 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-108)



    (Position in Stellar Map of star Kepler-108 and its Exoplanet Kepler-108 c)



    (Zoomed position in Stellar Map of star Kepler-108 and its Exoplanet Kepler-108 c (zoom level 3))

    (Synthetic Spectrum of star Kepler-108*)
    *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