Imaginary Picture of Kepler-78 b

Display orbital revolution of Kepler-78 b around the hoststar Kepler-78
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Exoplanet Name : Kepler-78 b
Alternate Name : "2MASS J19345800+4426539 b, KIC 8435766 b, Kepler-78 A b, WISE J193458.03+442653.7 b"
Status : Confirmed
Radius (Rjup / Re): 0.1000 (Rjup) 1.1209 (Rearth)
Mass (Mjup / Me): 0.0062 (Mjup) 1.9680 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0100 (AU) 0.0100 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0010
Orbital Period(Observed/Estimated) 0.36 (Days Obs.) 0.40 (Days Est.)
Surface Gravity (G Earth) 1.5664
Star Radiation at Atmospheric Boundary: 4491831.9 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 2054.7 (K)
Blackbody T 0.3(K) 1929.6 (K)
Blackbody T 0.7(K) 1561.2 (K)
Tidally Locked Blackbody T 0.1(K) 2443.5 (K)
Tidally Locked Blackbody T 0.3(K) 2294.7 (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-78
Alternate Name : "2MASS J19345800+4426539, KIC 8435766, Kepler-78 A, WISE J193458.03+442653.7"
Star Distance(LY) : 406.7
Stellar Radius(Rsun) : 0.7 (Rsun Measured)
Stellar Mass(Msun) : 0.8 (Msun Measured) 1.1 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5089 (K)
Spectral type : G
UV portion[%]: 3.8
Visible portion[%]: 38.3
IR portion[%]: 57.9
Metalicity : -0.1
Absolute Magnitude: 6.5
Apparent Magnitude: 12.0
Right Ascension(RA) 293.7417
Declination (DEC) 44.4483
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors 0
Discovery Paper - Title 0
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Kepler-78+&submit=SIMBAD+search
Open Exoplanet Database Link 0
Kepler-78 b
Kepler-78 b

  • Kepler-78 b is an exoplanet orbiting the star Kepler-78, located about 406.7 light-years (124.7 pc) away from Solar System. Its discovery was publicly announced on 2013.
  • The host star Kepler-78 has apparent magnitude of 12.0, with absolute magnitude of 6.5.
  • It is 0.8 times more massive and 0.7 times bigger compared with our Sun. The surface temperature is 5089 with its spectral types of G
  • In this planetary system, the extrasolar planet Kepler-78 b orbits around the star Kepler-78 every 0.4 days with its orbital distance of 0.01 AU ( 1495978.7 km)
  • (Projected orbit of Kepler-78 b around its host star Kepler-78)


  • The Star Kepler-78 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.415 AU ( 62025097.1 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.573 AU ( 85734893.2 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.873 AU ( 130641004.2 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.285 AU ( 192243960.7 km)
  • Radiation at Planetary Boundary of Kepler-78 b : 4491831.86 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-78)



  • Kopparapu Recent Venus for Star Kepler-78 distance : 0.447 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-78 distance : 0.565 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-78 distance : 0.546 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-78 distance : 0.599 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-78 distance : 1.021 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-78 distance : 1.077 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-78)



  • Original Kopparapu Recent Venus for Star Kepler-78 distance : 0.442 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-78 distance : 0.582 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-78 distance : 0.585 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-78 distance : 1.038 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-78 distance : 1.080 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-78)



    (Position in Stellar Map of star Kepler-78 and its Exoplanet Kepler-78 b)



    (Zoomed position in Stellar Map of star Kepler-78 and its Exoplanet Kepler-78 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-78*)
    *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