Imaginary Picture of Kepler-388 b

Display orbital revolution of Kepler-388 b around the hoststar Kepler-388
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Exoplanet Name : Kepler-388 b
Alternate Name : "2MASS J18591872+4436314 b, K02466.01, KIC 8544992 b, KOI-2466 b, KOI-2466.01, WISE J185918.73+443631.2 b"
Status : Confirmed
Radius (Rjup / Re): 0.0720 (Rjup) 0.8070 (Rearth)
Mass (Mjup / Me): 0.0014 (Mjup) 0.4571 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0360 (AU) 0.0360 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0087
Orbital Period(Observed/Estimated) 3.17 (Days Obs.) 3.25 (Days Est.)
Surface Gravity (G Earth) 0.7018
Star Radiation at Atmospheric Boundary: 155473.8 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 886.3 (K)
Blackbody T 0.3(K) 832.3 (K)
Blackbody T 0.7(K) 673.4 (K)
Tidally Locked Blackbody T 0.1(K) 1053.9 (K)
Tidally Locked Blackbody T 0.3(K) 989.8 (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-388
Alternate Name : "2MASS J18591872+4436314, KIC 8544992, KOI-2466, WISE J185918.73+443631.2"
Star Distance(LY) : 1120.7
Stellar Radius(Rsun) : 0.6 (Rsun Measured)
Stellar Mass(Msun) : 0.6 (Msun Measured) 0.6 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 4500 (K)
Spectral type : K5
UV portion[%]: 1.6
Visible portion[%]: 31.1
IR portion[%]: 67.3
Metalicity : -0.3
Absolute Magnitude: 5.6
Apparent Magnitude: 13.3
Right Ascension(RA) 284.8280
Declination (DEC) 44.6087
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-388+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-388%20b/
Kepler-388 b
Kepler-388 b

  • Kepler-388 b is an exoplanet orbiting the star Kepler-388, located about 1120.7 light-years (343.6 pc) away from Solar System. Its discovery was publicly announced on 2014.
  • The host star Kepler-388 has apparent magnitude of 13.3, with absolute magnitude of 5.6.
  • It is 0.6 times more massive and 0.6 times bigger compared with our Sun. The surface temperature is 4500 with its spectral types of K5
  • In this planetary system, the extrasolar planet Kepler-388 b orbits around the star Kepler-388 every 3.2 days with its orbital distance of 0.04 AU ( 5385523.3 km)
  • (Projected orbit of Kepler-388 b around its host star Kepler-388)


  • The Star Kepler-388 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.278 AU ( 41541947.3 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.384 AU ( 57421827.3 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.585 AU ( 87498157.4 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.861 AU ( 128757371.7 km)
  • Radiation at Planetary Boundary of Kepler-388 b : 155473.83 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-388)



  • Kopparapu Recent Venus for Star Kepler-388 distance : 0.307 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-388 distance : 0.388 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-388 distance : 0.375 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-388 distance : 0.412 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-388 distance : 0.719 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-388 distance : 0.759 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-388)



  • Original Kopparapu Recent Venus for Star Kepler-388 distance : 0.303 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-388 distance : 0.401 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-388 distance : 0.400 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-388 distance : 0.731 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-388 distance : 0.760 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-388)



    (Position in Stellar Map of star Kepler-388 and its Exoplanet Kepler-388 b)



    (Zoomed position in Stellar Map of star Kepler-388 and its Exoplanet Kepler-388 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-388*)
    *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