Imaginary Picture of Kepler-305 c

Display orbital revolution of Kepler-305 c around the hoststar Kepler-305
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Exoplanet Name : Kepler-305 c
Alternate Name : "2MASS J19565383+4020354 c, K01563.02, KIC 5219234 c, KOI-1563 c, KOI-1563.02, WISE J195653.83+402035.4 c"
Status : Confirmed
Radius (Rjup / Re): 0.2940 (Rjup) 3.2954 (Rearth)
Mass (Mjup / Me): 0.0190 (Mjup) 6.0408 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0771 (AU) 0.0771 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0227
Orbital Period(Observed/Estimated) 8.29 (Days Obs.) 8.58 (Days Est.)
Surface Gravity (G Earth) 0.5562
Star Radiation at Atmospheric Boundary: 84640.4 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 761.3 (K)
Blackbody T 0.3(K) 714.9 (K)
Blackbody T 0.7(K) 578.4 (K)
Tidally Locked Blackbody T 0.1(K) 905.3 (K)
Tidally Locked Blackbody T 0.3(K) 850.2 (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 : Kepler-305
Alternate Name : "2MASS J19565383+4020354, KIC 5219234, KOI-1563, WISE J195653.83+402035.4"
Star Distance(LY) : 2901.7
Stellar Radius(Rsun) : 0.8 (Rsun Measured)
Stellar Mass(Msun) : 0.8 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5080 (K)
Spectral type : K1
UV portion[%]: 3.9
Visible portion[%]: 38.4
IR portion[%]: 57.6
Metalicity : -0.1
Absolute Magnitude: 6.1
Apparent Magnitude: 15.8
Right Ascension(RA) 299.2243
Declination (DEC) 40.3432
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-305+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-305%20c/
Kepler-305 c
Kepler-305 c

  • Kepler-305 c is an exoplanet orbiting the star Kepler-305, located about 2901.7 light-years (889.7 pc) away from Solar System. Its discovery was publicly announced on 2013.
  • The host star Kepler-305 has apparent magnitude of 15.8, with absolute magnitude of 6.1.
  • It is 0.8 times more massive and 0.8 times bigger compared with our Sun. The surface temperature is 5080 with its spectral types of K1
  • In this planetary system, the extrasolar planet Kepler-305 c orbits around the star Kepler-305 every 8.3 days with its orbital distance of 0.08 AU ( 11535491.8 km)
  • (Projected orbit of Kepler-305 c around its host star Kepler-305)


  • The Star Kepler-305 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.439 AU ( 65653093.4 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.607 AU ( 90749732.3 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.924 AU ( 138282509.1 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.360 AU ( 203488770.0 km)
  • Radiation at Planetary Boundary of Kepler-305 c : 84640.37 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-305)



  • Kopparapu Recent Venus for Star Kepler-305 distance : 0.473 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-305 distance : 0.599 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-305 distance : 0.578 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-305 distance : 0.635 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-305 distance : 1.082 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-305 distance : 1.141 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-305)



  • Original Kopparapu Recent Venus for Star Kepler-305 distance : 0.468 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-305 distance : 0.617 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-305 distance : 0.620 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-305 distance : 1.100 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-305 distance : 1.144 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-305)



    (Position in Stellar Map of star Kepler-305 and its Exoplanet Kepler-305 c)



    (Zoomed position in Stellar Map of star Kepler-305 and its Exoplanet Kepler-305 c (zoom level 3))

    (Synthetic Spectrum of star Kepler-305*)
    *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