Imaginary Picture of Kepler-303 c

Display orbital revolution of Kepler-303 c around the hoststar Kepler-303
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Exoplanet Name : Kepler-303 c
Alternate Name : "2MASS J18523251+4339253 c, K01515.02, KIC 7871954 c, KOI-1515 c, KOI-1515.02, WISE J185232.51+433924.5 c"
Status : Confirmed
Radius (Rjup / Re): 0.1020 (Rjup) 1.1433 (Rearth)
Mass (Mjup / Me): 0.0050 (Mjup) 1.5835 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0570 (AU) 0.0570 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0193
Orbital Period(Observed/Estimated) 7.06 (Days Obs.) 6.47 (Days Est.)
Surface Gravity (G Earth) 1.2114
Star Radiation at Atmospheric Boundary: 35773.6 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 613.8 (K)
Blackbody T 0.3(K) 576.4 (K)
Blackbody T 0.7(K) 466.4 (K)
Tidally Locked Blackbody T 0.1(K) 729.9 (K)
Tidally Locked Blackbody T 0.3(K) 685.5 (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-303
Alternate Name : "2MASS J18523251+4339253, KIC 7871954, KOI-1515, WISE J185232.51+433924.5"
Star Distance(LY) : 683.9
Stellar Radius(Rsun) : 0.6 (Rsun Measured)
Stellar Mass(Msun) : 0.6 (Msun Measured) 0.5 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 4045 (K)
Spectral type : M0 V
UV portion[%]: 0.8
Visible portion[%]: 25.2
IR portion[%]: 74.0
Metalicity : 0.1
Absolute Magnitude: 5.8
Apparent Magnitude: 12.4
Right Ascension(RA) 283.1355
Declination (DEC) 43.6571
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-303+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-303%20c/
Kepler-303 c
Kepler-303 c

  • Kepler-303 c is an exoplanet orbiting the star Kepler-303, located about 683.9 light-years (209.7 pc) away from Solar System. Its discovery was publicly announced on 2014.
  • The host star Kepler-303 has apparent magnitude of 12.4, with absolute magnitude of 5.8.
  • It is 0.6 times more massive and 0.6 times bigger compared with our Sun. The surface temperature is 4045 with its spectral types of M0 V
  • In this planetary system, the extrasolar planet Kepler-303 c orbits around the star Kepler-303 every 7.1 days with its orbital distance of 0.06 AU ( 8527078.6 km)
  • (Projected orbit of Kepler-303 c around its host star Kepler-303)


  • The Star Kepler-303 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.211 AU ( 31550927.5 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.292 AU ( 43611627.0 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.444 AU ( 66454468.3 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.654 AU ( 97790661.3 km)
  • Radiation at Planetary Boundary of Kepler-303 c : 35773.64 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-303)



  • Kopparapu Recent Venus for Star Kepler-303 distance : 0.236 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-303 distance : 0.299 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-303 distance : 0.289 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-303 distance : 0.317 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-303 distance : 0.566 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-303 distance : 0.597 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-303)



  • Original Kopparapu Recent Venus for Star Kepler-303 distance : 0.233 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-303 distance : 0.309 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-303 distance : 0.308 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-303 distance : 0.575 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-303 distance : 0.598 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-303)



    (Position in Stellar Map of star Kepler-303 and its Exoplanet Kepler-303 c)



    (Zoomed position in Stellar Map of star Kepler-303 and its Exoplanet Kepler-303 c (zoom level 3))

    (Synthetic Spectrum of star Kepler-303*)
    *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