Imaginary Picture of Kepler-306 c

Display orbital revolution of Kepler-306 c around the hoststar Kepler-306
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Exoplanet Name : Kepler-306 c
Alternate Name : "2MASS J19140928+4036581 c, K01567.01, KIC 5438099 c, KOI-1567 c, KOI-1567.01, WISE J191409.29+403657.9 c"
Status : Confirmed
Radius (Rjup / Re): 0.2100 (Rjup) 2.3539 (Rearth)
Mass (Mjup / Me): 0.0184 (Mjup) 5.8489 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0670 (AU) 0.0670 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0198
Orbital Period(Observed/Estimated) 7.24 (Days Obs.) 7.00 (Days Est.)
Surface Gravity (G Earth) 1.0556
Star Radiation at Atmospheric Boundary: 96688.6 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 787.0 (K)
Blackbody T 0.3(K) 739.1 (K)
Blackbody T 0.7(K) 598.0 (K)
Tidally Locked Blackbody T 0.1(K) 935.9 (K)
Tidally Locked Blackbody T 0.3(K) 878.9 (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-306
Alternate Name : "2MASS J19140928+4036581, KIC 5438099, KOI-1567, WISE J191409.29+403657.9"
Star Distance(LY) : 2531.0
Stellar Radius(Rsun) : 0.8 (Rsun Measured)
Stellar Mass(Msun) : 0.8 (Msun Measured) 0.8 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 4908 (K)
Spectral type : K2
UV portion[%]: 3.0
Visible portion[%]: 36.6
IR portion[%]: 60.4
Metalicity : 0.2
Absolute Magnitude: 4.6
Apparent Magnitude: 14.1
Right Ascension(RA) 288.5387
Declination (DEC) 40.6161
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors 0
Discovery Paper - Title
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Kepler-306+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-306%20c/
Kepler-306 c
Kepler-306 c

  • Kepler-306 c is an exoplanet orbiting the star Kepler-306, located about 2531.0 light-years (776.0 pc) away from Solar System. Its discovery was publicly announced on 2014.
  • The host star Kepler-306 has apparent magnitude of 14.1, with absolute magnitude of 4.6.
  • It is 0.8 times more massive and 0.8 times bigger compared with our Sun. The surface temperature is 4908 with its spectral types of K2
  • In this planetary system, the extrasolar planet Kepler-306 c orbits around the star Kepler-306 every 7.2 days with its orbital distance of 0.07 AU ( 10023057.3 km)
  • (Projected orbit of Kepler-306 c around its host star Kepler-306)


  • The Star Kepler-306 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.408 AU ( 60970289.1 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.563 AU ( 84276873.0 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.858 AU ( 128419304.0 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.263 AU ( 188974631.6 km)
  • Radiation at Planetary Boundary of Kepler-306 c : 96688.65 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-306)



  • Kopparapu Recent Venus for Star Kepler-306 distance : 0.443 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-306 distance : 0.561 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-306 distance : 0.541 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-306 distance : 0.594 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-306 distance : 1.020 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-306 distance : 1.076 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-306)



  • Original Kopparapu Recent Venus for Star Kepler-306 distance : 0.438 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-306 distance : 0.578 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-306 distance : 0.579 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-306 distance : 1.037 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-306 distance : 1.078 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-306)



    (Position in Stellar Map of star Kepler-306 and its Exoplanet Kepler-306 c)



    (Zoomed position in Stellar Map of star Kepler-306 and its Exoplanet Kepler-306 c (zoom level 3))

    (Synthetic Spectrum of star Kepler-306*)
    *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