Imaginary Picture of Kepler-40 b

Display orbital revolution of Kepler-40 b around the hoststar Kepler-40
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Exoplanet Name : Kepler-40 b
Alternate Name : "KOI-428 b, 2MASS J19471528+4731357 b, K00428.01, KIC 10418224 b, KOI-428.01, WISE J194715.29+473135.5 b"
Status : Confirmed
Radius (Rjup / Re): 1.1700 (Rjup) 13.1145 (Rearth)
Mass (Mjup / Me): 2.2000 (Mjup) 699.4636 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0800 (AU) 0.0800 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0188
Orbital Period(Observed/Estimated) 6.87 (Days Obs.) 6.79 (Days Est.)
Surface Gravity (G Earth) 4.0669
Star Radiation at Atmospheric Boundary: 1676306.6 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1605.9 (K)
Blackbody T 0.3(K) 1508.2 (K)
Blackbody T 0.7(K) 1220.3 (K)
Tidally Locked Blackbody T 0.1(K) 1909.8 (K)
Tidally Locked Blackbody T 0.3(K) 1793.5 (K)
Size Class: Jupiter-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-40
Alternate Name : "2MASS J19471528+4731357, KIC 10418224, KOI-428, WISE J194715.29+473135.5"
Star Distance(LY) : 7542.7
Stellar Radius(Rsun) : 2.2 (Rsun Measured)
Stellar Mass(Msun) : 1.5 (Msun Measured) 1.4 (Msun Estimated)
Star Age : 2.8 (GY)
Temperature : 6510 (K)
Spectral type : F5 IV
UV portion[%]: 7.8
Visible portion[%]: 44.8
IR portion[%]: 47.4
Metalicity : 0.1
Absolute Magnitude: 2.9
Apparent Magnitude: 14.8
Right Ascension(RA) 296.8137
Declination (DEC) 47.5266
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-40&submit=SIMBAD+search
Open Exoplanet Database Link 0
Kepler-40 b
Kepler-40 b

  • Kepler-40 b is an exoplanet orbiting the star Kepler-40, located about 7542.7 light-years (2312.6 pc) away from Solar System. Its discovery was publicly announced on 2010.
  • The host star Kepler-40 has apparent magnitude of 14.8, with absolute magnitude of 2.9.
  • It is 1.5 times more massive and 2.2 times bigger compared with our Sun. The surface temperature is 6510 with its spectral types of F5 IV
  • In this planetary system, the extrasolar planet Kepler-40 b orbits around the star Kepler-40 every 6.9 days with its orbital distance of 0.08 AU ( 11967829.7 km)
  • (Projected orbit of Kepler-40 b around its host star Kepler-40)


  • The Star Kepler-40 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 2.026 AU ( 303125465.4 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 2.801 AU ( 418998609.4 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 4.268 AU ( 638461156.5 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 6.280 AU ( 939523560.9 km)
  • Radiation at Planetary Boundary of Kepler-40 b : 1676306.61 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-40)



  • Kopparapu Recent Venus for Star Kepler-40 distance : 2.010 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-40 distance : 2.545 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-40 distance : 2.458 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-40 distance : 2.693 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-40 distance : 4.427 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-40 distance : 4.669 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-40)



  • Original Kopparapu Recent Venus for Star Kepler-40 distance : 2.044 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-40 distance : 2.609 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-40 distance : 2.705 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-40 distance : 4.507 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-40 distance : 4.687 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-40)



    (Position in Stellar Map of star Kepler-40 and its Exoplanet Kepler-40 b)



    (Zoomed position in Stellar Map of star Kepler-40 and its Exoplanet Kepler-40 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-40*)
    *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