Imaginary Picture of Kepler-1388 c

Display orbital revolution of Kepler-1388 c around the hoststar Kepler-1388
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Exoplanet Name : Kepler-1388 c
Alternate Name : "2MASS J18532065+4710283 c, K02926.02, KIC 10122538 c, KOI-2926 c, KOI-2926.02, WISE J185320.64+471028.1 c"
Status : Confirmed
Radius (Rjup / Re): 0.2020 (Rjup) 2.2642 (Rearth)
Mass (Mjup / Me): 0.0177 (Mjup) 5.6414 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.0525 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0152
Orbital Period(Observed/Estimated) 5.54 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 1.1004
Star Radiation at Atmospheric Boundary: 68165.6 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 721.2 (K)
Blackbody T 0.3(K) 677.2 (K)
Blackbody T 0.7(K) 548.0 (K)
Tidally Locked Blackbody T 0.1(K) 857.6 (K)
Tidally Locked Blackbody T 0.3(K) 805.4 (K)
Size Class: sub-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-1388
Alternate Name : "2MASS J18532065+4710283, KIC 10122538, KOI-2926, WISE J185320.64+471028.1"
Star Distance(LY) : 1480.2
Stellar Radius(Rsun) : 0.5 (Rsun Measured)
Stellar Mass(Msun) : 0.6 (Msun Measured) 0.6 (Msun Estimated)
Star Age : 4.5 (GY)
Temperature : 5052 (K)
Spectral type : K7
UV portion[%]: 3.6
Visible portion[%]: 37.7
IR portion[%]: 58.7
Metalicity : 0.0
Absolute Magnitude: 5.9
Apparent Magnitude: 14.2
Right Ascension(RA) 283.3360
Declination (DEC) 47.1745
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors "Timothy D. Morton, Stephen T. Bryson, Jeffrey L. Coughlin, Jason F. Rowe, Ganesh Ravichandran, Erik A. Petigura, Michael R. Haas, and Natalie M. Batalha2"
Discovery Paper - Title FALSE POSITIVE PROBABILITIES FOR ALL KEPLER OBJECTS OF INTEREST: 1284 NEWLY VALIDATED PLANETS AND 428 LIKELY FALSE POSITIVES
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Kepler-1388+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-1388%20c/
Kepler-1388 c
Kepler-1388 c

  • Kepler-1388 c is an exoplanet orbiting the star Kepler-1388, located about 1480.2 light-years (453.8 pc) away from Solar System. Its discovery was publicly announced on 2016.
  • The host star Kepler-1388 has apparent magnitude of 14.2, with absolute magnitude of 5.9.
  • It is 0.6 times more massive and 0.5 times bigger compared with our Sun. The surface temperature is 5052 with its spectral types of K7
  • In this planetary system, the extrasolar planet Kepler-1388 c orbits around the star Kepler-1388 every 5.5 days with its orbital distance of 0.05 AU ( 7854413.5 km)
  • (Projected orbit of Kepler-1388 c around its host star Kepler-1388)


  • The Star Kepler-1388 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.268 AU ( 40116823.2 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.371 AU ( 55451933.5 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.565 AU ( 84496475.1 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.831 AU ( 124340264.7 km)
  • Radiation at Planetary Boundary of Kepler-1388 c : 68165.55 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-1388)



  • Kopparapu Recent Venus for Star Kepler-1388 distance : 0.289 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-1388 distance : 0.366 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-1388 distance : 0.354 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-1388 distance : 0.388 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1388 distance : 0.663 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-1388 distance : 0.699 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-1388)



  • Original Kopparapu Recent Venus for Star Kepler-1388 distance : 0.286 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-1388 distance : 0.377 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-1388 distance : 0.379 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1388 distance : 0.674 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-1388 distance : 0.701 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-1388)



    (Position in Stellar Map of star Kepler-1388 and its Exoplanet Kepler-1388 c)



    (Zoomed position in Stellar Map of star Kepler-1388 and its Exoplanet Kepler-1388 c (zoom level 3))

    (Synthetic Spectrum of star Kepler-1388*)
    *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