Imaginary Picture of Kepler-1308 b

Display orbital revolution of Kepler-1308 b around the hoststar Kepler-1308
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Exoplanet Name : Kepler-1308 b
Alternate Name : "2MASS J19034293+3831155 b, K02662.01, KIC 3426367 b, KOI-2662 b, KOI-2662.01, WISE J190342.91+383114.8 b"
Status : Confirmed
Radius (Rjup / Re): 0.0460 (Rjup) 0.5156 (Rearth)
Mass (Mjup / Me): 0.0003 (Mjup) 0.0966 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.0226 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0058
Orbital Period(Observed/Estimated) 2.10 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 0.3635
Star Radiation at Atmospheric Boundary: 96624.9 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 786.9 (K)
Blackbody T 0.3(K) 739.0 (K)
Blackbody T 0.7(K) 597.9 (K)
Tidally Locked Blackbody T 0.1(K) 935.8 (K)
Tidally Locked Blackbody T 0.3(K) 878.8 (K)
Size Class: Mars-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-1308
Alternate Name : "2MASS J19034293+3831155, KIC 3426367, KOI-2662, WISE J190342.91+383114.8"
Star Distance(LY) : 367.6
Stellar Radius(Rsun) : 0.5 (Rsun Measured)
Stellar Mass(Msun) : 0.3 (Msun Measured) 0.4 (Msun Estimated)
Star Age : 3.7 (GY)
Temperature : 3628 (K)
Spectral type : M4
UV portion[%]: 0.3
Visible portion[%]: 12.6
IR portion[%]: 87.1
Metalicity : -0.1
Absolute Magnitude: 6.6
Apparent Magnitude: 11.9
Right Ascension(RA) 285.9289
Declination (DEC) 38.5210
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors "Timothy D. Morton1, Stephen T. Bryson2, Jeffrey L. Coughlin2,3, Jason F. Rowe4, Ganesh Ravichandran5, Erik A. Petigura6,7, Michael R. Haas2, and Natalie M. Batalha32"
Discovery Paper - Title FALSE POSITIVE PROBABILITIES FOR ALL KEPLER OBJECTS OF INTEREST: 1284 NEWLY VALIDATED PLANETS AND 449 LIKELY FALSE POSITIVES
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Kepler-1308+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-1308%20b/
Kepler-1308 b
Kepler-1308 b

  • Kepler-1308 b is an exoplanet orbiting the star Kepler-1308, located about 367.6 light-years (112.7 pc) away from Solar System. Its discovery was publicly announced on 2016.
  • The host star Kepler-1308 has apparent magnitude of 11.9, with absolute magnitude of 6.6.
  • It is 0.3 times more massive and 0.5 times bigger compared with our Sun. The surface temperature is 3628 with its spectral types of M4
  • In this planetary system, the extrasolar planet Kepler-1308 b orbits around the star Kepler-1308 every 2.1 days with its orbital distance of 0.02 AU ( 3388168.2 km)
  • (Projected orbit of Kepler-1308 b around its host star Kepler-1308)


  • The Star Kepler-1308 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.138 AU ( 20603443.0 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.190 AU ( 28479342.5 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.290 AU ( 43396215.5 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.427 AU ( 63859432.2 km)
  • Radiation at Planetary Boundary of Kepler-1308 b : 96624.91 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-1308)



  • Kopparapu Recent Venus for Star Kepler-1308 distance : 0.155 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-1308 distance : 0.197 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-1308 distance : 0.190 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-1308 distance : 0.209 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1308 distance : 0.380 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-1308 distance : 0.401 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-1308)



  • Original Kopparapu Recent Venus for Star Kepler-1308 distance : 0.154 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-1308 distance : 0.203 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-1308 distance : 0.204 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1308 distance : 0.386 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-1308 distance : 0.402 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-1308)



    (Position in Stellar Map of star Kepler-1308 and its Exoplanet Kepler-1308 b)



    (Zoomed position in Stellar Map of star Kepler-1308 and its Exoplanet Kepler-1308 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-1308*)
    *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