Imaginary Picture of Kepler-109 c

Display orbital revolution of Kepler-109 c around the hoststar Kepler-109
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Exoplanet Name : Kepler-109 c
Alternate Name : "2MASS J19213425+4017055 c, K00123.02, KIC 5094751 c, KOI-123 c, KOI-123.02, WISE J192134.24+401705.6 c"
Status : Confirmed
Radius (Rjup / Re): 0.2250 (Rjup) 2.5220 (Rearth)
Mass (Mjup / Me): 0.0686 (Mjup) 21.8074 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.1520 (AU Est.)
Eccentricity : 0.0300
Orbital Period(Yrs) 0.0581
Orbital Period(Observed/Estimated) 21.22 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 3.4285
Star Radiation at Atmospheric Boundary: 119292.3 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 829.5 (K)
Blackbody T 0.3(K) 779.0 (K)
Blackbody T 0.7(K) 630.3 (K)
Tidally Locked Blackbody T 0.1(K) 986.4 (K)
Tidally Locked Blackbody T 0.3(K) 926.3 (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-109
Alternate Name : "KOI-123, KIC 5094751, 2MASS J19213425+4017055, WISE J192134.24+401705.6"
Star Distance(LY) : 1545.8
Stellar Radius(Rsun) : 1.4 (Rsun Measured)
Stellar Mass(Msun) : 1.0 (Msun Measured) 1.0 (Msun Estimated)
Star Age : 5.7 (GY)
Temperature : 5917 (K)
Spectral type : G1
UV portion[%]: 7.8
Visible portion[%]: 44.8
IR portion[%]: 47.4
Metalicity : -0.1
Absolute Magnitude: 4.0
Apparent Magnitude: 12.4
Right Ascension(RA) 290.3927
Declination (DEC) 40.2849
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors "Geoffrey W. Marcy, Howard Isaacson, Andrew W. Howard et al. The Astrophysical Journal, Supplement Series 210:20(70pp) 2014 February, doi:10.1088/0067-0049/210/2/20"
Discovery Paper - Title "Masses, Radii, and Orbits of Small Kepler Planets: The Transition from Gaseous to Rocky Planets"
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Kepler-109+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-109%20b/
Kepler-109 c
Kepler-109 c

  • Kepler-109 c is an exoplanet orbiting the star Kepler-109, located about 1545.8 light-years (473.9 pc) away from Solar System. Its discovery was publicly announced on 2014.
  • The host star Kepler-109 has apparent magnitude of 12.4, with absolute magnitude of 4.0.
  • It is 1.0 times more massive and 1.4 times bigger compared with our Sun. The surface temperature is 5917 with its spectral types of G1
  • In this planetary system, the extrasolar planet Kepler-109 c orbits around the star Kepler-109 every 21.2 days with its orbital distance of 0.15 AU ( 22737539.4 km)
  • (Projected orbit of Kepler-109 c around its host star Kepler-109)


  • The Star Kepler-109 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.027 AU ( 153631374.2 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.420 AU ( 212358707.9 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.163 AU ( 323587675.9 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 3.183 AU ( 476173440.6 km)
  • Radiation at Planetary Boundary of Kepler-109 c : 119292.27 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-109)



  • Kopparapu Recent Venus for Star Kepler-109 distance : 1.055 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-109 distance : 1.337 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-109 distance : 1.291 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-109 distance : 1.415 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-109 distance : 2.352 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-109 distance : 2.481 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-109)



  • Original Kopparapu Recent Venus for Star Kepler-109 distance : 1.060 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-109 distance : 1.373 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-109 distance : 1.402 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-109 distance : 2.394 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-109 distance : 2.489 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-109)



    (Position in Stellar Map of star Kepler-109 and its Exoplanet Kepler-109 c)



    (Zoomed position in Stellar Map of star Kepler-109 and its Exoplanet Kepler-109 c (zoom level 3))

    (Synthetic Spectrum of star Kepler-109*)
    *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