Imaginary Picture of Kepler-99 b

Display orbital revolution of Kepler-99 b around the hoststar Kepler-99
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Exoplanet Name : Kepler-99 b
Alternate Name : "2MASS J19492496+4118001 b, K00305.01, KIC 6063220 b, KOI-305 b, KOI-305.01, Kepler-99 B b, WISE J194924.96+411800.2 b"
Radius (Rjup / Re): 0.1320 (Rjup) 1.4796 (Rearth)
Mass (Mjup / Me): 0.0190 (Mjup) 6.0408 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.0501 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0126
Orbital Period(Observed/Estimated) 4.60 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 2.7594
Star Radiation at Atmospheric Boundary: 148878.6 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 876.7 (K)
Blackbody T 0.3(K) 823.3 (K)
Blackbody T 0.7(K) 666.1 (K)
Tidally Locked Blackbody T 0.1(K) 1042.6 (K)
Tidally Locked Blackbody T 0.3(K) 979.1 (K)
Size Class: super-Earth-size
Mass Class:
Detection Type : Primary Transit
Mass Detection :
Radius Detection : Primary Transit
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : Kepler-99
Alternate Name : "KOI-305, KIC 6063220, 2MASS J19492496+4118001, Kepler-99 B, WISE J194924.96+411800.2"
Star Distance(LY) : 683.7
Stellar Radius(Rsun) : 0.7 (Rsun Measured)
Stellar Mass(Msun) : 0.8 (Msun Measured) 0.8 (Msun Estimated)
Star Age : 1.5 (GY)
Temperature : 4852 (K)
Spectral type : K3
UV portion[%]: 2.4
Visible portion[%]: 35.3
IR portion[%]: 62.3
Metalicity : 0.2
Absolute Magnitude: 4.8
Apparent Magnitude: 11.4
Right Ascension(RA) 297.3540
Declination (DEC) 41.3000
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal
Discovery Paper - URL
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Kepler-99+&submit=SIMBAD+search
Open Exoplanet Database Link
Kepler-99 b
Kepler-99 b

  • Kepler-99 b is an exoplanet orbiting the star Kepler-99, located about 683.7 light-years (209.6 pc) away from Solar System. Its discovery was publicly announced on 2014.
  • The host star Kepler-99 has apparent magnitude of 11.4, with absolute magnitude of 4.8.
  • It is 0.8 times more massive and 0.7 times bigger compared with our Sun. The surface temperature is 4852 with its spectral types of K3
  • In this planetary system, the extrasolar planet Kepler-99 b orbits around the star Kepler-99 every 4.6 days with its orbital distance of 0.05 AU ( 7489820.7 km)
  • (Projected orbit of Kepler-99 b around its host star Kepler-99)


  • The Star Kepler-99 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.378 AU ( 56535066.2 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.522 AU ( 78146235.8 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.796 AU ( 119077569.7 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.171 AU ( 175227860.2 km)
  • Radiation at Planetary Boundary of Kepler-99 b : 148878.63 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-99)



  • Kopparapu Recent Venus for Star Kepler-99 distance : 0.412 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-99 distance : 0.521 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-99 distance : 0.503 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-99 distance : 0.552 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-99 distance : 0.950 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-99 distance : 1.002 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-99)



  • Original Kopparapu Recent Venus for Star Kepler-99 distance : 0.407 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-99 distance : 0.537 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-99 distance : 0.538 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-99 distance : 0.966 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-99 distance : 1.005 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-99)



    (Position in Stellar Map of star Kepler-99 and its Exoplanet Kepler-99 b)



    (Zoomed position in Stellar Map of star Kepler-99 and its Exoplanet Kepler-99 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-99*)
    *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