Imaginary Picture of Kepler-1678 b

Display orbital revolution of Kepler-1678 b around the hoststar Kepler-1678
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Exoplanet Name : Kepler-1678 b
Alternate Name : "2MASS J19302199+3823587 b, K02066.01, KIC 3239671 b, KOI-2066 b, KOI-2066.01, WISE J193021.99+382358.7 b"
Status : Confirmed
Radius (Rjup / Re): 0.2950 (Rjup) 3.3067 (Rearth)
Mass (Mjup / Me): 0.0252 (Mjup) 8.0231 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.5407 (AU) 0.5407 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.4051
Orbital Period(Observed/Estimated) 147.97 (Days Obs.) 148.14 (Days Est.)
Surface Gravity (G Earth) 0.7338
Star Radiation at Atmospheric Boundary: 2934.2 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 328.5 (K)
Blackbody T 0.3(K) 308.5 (K)
Blackbody T 0.7(K) 249.6 (K)
Tidally Locked Blackbody T 0.1(K) 390.6 (K)
Tidally Locked Blackbody T 0.3(K) 366.8 (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-1678
Alternate Name : "3239671, 2MASS J19302199+3823587, KIC 3239671, KOI-2066, WISE J193021.99+382358.7"
Star Distance(LY) : 2830.8
Stellar Radius(Rsun) : 0.9 (Rsun Measured)
Stellar Mass(Msun) : 1.0 (Msun Measured) 1.0 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5421 (K)
Spectral type : G7
UV portion[%]: 6.5
Visible portion[%]: 42.6
IR portion[%]: 50.9
Metalicity : -0.3
Absolute Magnitude: 5.0
Apparent Magnitude: 14.7
Right Ascension(RA) 292.5916
Declination (DEC) 38.3997
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-1678+&submit=SIMBAD+search
Open Exoplanet Database Link
Kepler-1678 b
Kepler-1678 b

  • Kepler-1678 b is an exoplanet orbiting the star Kepler-1678, located about 2830.8 light-years (867.9 pc) away from Solar System. Its discovery was publicly announced on 2020.
  • The host star Kepler-1678 has apparent magnitude of 14.7, with absolute magnitude of 5.0.
  • It is 1.0 times more massive and 0.9 times bigger compared with our Sun. The surface temperature is 5421 with its spectral types of G7
  • In this planetary system, the extrasolar planet Kepler-1678 b orbits around the star Kepler-1678 every 148.0 days with its orbital distance of 0.54 AU ( 80887568.7 km)
  • (Projected orbit of Kepler-1678 b around its host star Kepler-1678)


  • The Star Kepler-1678 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.573 AU ( 85715514.5 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.792 AU ( 118481241.2 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.207 AU ( 180539191.8 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.776 AU ( 265671329.6 km)
  • Radiation at Planetary Boundary of Kepler-1678 b : 2934.23 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-1678)



  • Kopparapu Recent Venus for Star Kepler-1678 distance : 0.606 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-1678 distance : 0.768 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-1678 distance : 0.742 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-1678 distance : 0.813 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1678 distance : 1.370 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-1678 distance : 1.445 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-1678)



  • Original Kopparapu Recent Venus for Star Kepler-1678 distance : 0.603 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-1678 distance : 0.790 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-1678 distance : 0.798 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1678 distance : 1.394 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-1678 distance : 1.450 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-1678)



    (Position in Stellar Map of star Kepler-1678 and its Exoplanet Kepler-1678 b)



    (Zoomed position in Stellar Map of star Kepler-1678 and its Exoplanet Kepler-1678 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-1678*)
    *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