Imaginary Picture of Kepler-229 d

Display orbital revolution of Kepler-229 d around the hoststar Kepler-229
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Exoplanet Name : Kepler-229 d
Alternate Name : "2MASS J19075987+4822328 d, K00757.02, KIC 10910878 d, KOI-757 d, KOI-757.02, WISE J190759.88+482232.7 d"
Status : Confirmed
Radius (Rjup / Re): 0.3430 (Rjup) 3.8447 (Rearth)
Mass (Mjup / Me): 0.0290 (Mjup) 9.2307 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.2200 (AU) 0.2200 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.1128
Orbital Period(Observed/Estimated) 41.19 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 0.6245
Star Radiation at Atmospheric Boundary: 8199.6 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 424.7 (K)
Blackbody T 0.3(K) 398.8 (K)
Blackbody T 0.7(K) 322.7 (K)
Tidally Locked Blackbody T 0.1(K) 505.1 (K)
Tidally Locked Blackbody T 0.3(K) 474.3 (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-229
Alternate Name : "2MASS J19075987+4822328, KIC 10910878, KOI-757, WISE J190759.88+482232.7"
Star Distance(LY) : 2697.4
Stellar Radius(Rsun) : 0.7 (Rsun Measured)
Stellar Mass(Msun) : 0.0 (Msun Measured) 0.8 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5002 (K)
Spectral type : K1
UV portion[%]: 4.1
Visible portion[%]: 38.8
IR portion[%]: 57.1
Metalicity : -0.1
Absolute Magnitude: 4.8
Apparent Magnitude: 14.4
Right Ascension(RA) 286.9995
Declination (DEC) 48.3758
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-229+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-229%20d/
Kepler-229 d
Kepler-229 d

  • Kepler-229 d is an exoplanet orbiting the star Kepler-229, located about 2697.4 light-years (827.0 pc) away from Solar System. Its discovery was publicly announced on 2014.
  • The host star Kepler-229 has apparent magnitude of 14.4, with absolute magnitude of 4.8.
  • In this planetary system, the extrasolar planet Kepler-229 d orbits around the star Kepler-229 every 41.2 days with its orbital distance of 0.22 AU ( 32911531.6 km)
  • (Projected orbit of Kepler-229 d around its host star Kepler-229)


  • The Star Kepler-229 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.390 AU ( 58300781.7 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.539 AU ( 80586916.1 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.821 AU ( 122796626.3 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.208 AU ( 180700614.9 km)
  • Radiation at Planetary Boundary of Kepler-229 d : 8199.59 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-229)



  • Kopparapu Recent Venus for Star Kepler-229 distance : 0.422 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-229 distance : 0.534 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-229 distance : 0.516 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-229 distance : 0.566 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-229 distance : 0.967 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-229 distance : 1.020 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-229)



  • Original Kopparapu Recent Venus for Star Kepler-229 distance : 0.417 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-229 distance : 0.550 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-229 distance : 0.552 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-229 distance : 0.984 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-229 distance : 1.023 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-229)



    (Position in Stellar Map of star Kepler-229 and its Exoplanet Kepler-229 d)



    (Zoomed position in Stellar Map of star Kepler-229 and its Exoplanet Kepler-229 d (zoom level 3))

    (Synthetic Spectrum of star Kepler-229*)
    *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