Imaginary Picture of Kepler-1638 b
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Exoplanet Name : Kepler-1638 b
Alternate Name :
Radius (Rjup / Re): 0.1670 (Rjup) 1.8719 (Rearth)
Mass (Mjup / Me): 0.0149 (Mjup) 4.7265 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.7878 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.7100
Orbital Period(Observed/Estimated) 259.34 (Days Obs.) 0.00 (Days Est.)
Star Radiation at Atmospheric Boundary: 5258.9 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 380.1 (K)
Blackbody T 0.3(K) 356.9 (K)
Blackbody T 0.7(K) 288.8 (K)
Tidally Locked Blackbody T 0.1(K) 452.0 (K)
Tidally Locked Blackbody T 0.3(K) 424.5 (K)
Size Class: super-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-1638
Alternate Name :
Star Distance(LY) : 4979.1
Stellar Radius(Rsun) : 1.7 (Rsun Measured)
Stellar Mass(Msun) : 1.0 (Msun Measured) 1.0 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5488 (K)
Spectral type : G4
Metalicity : -0.0
Absolute Magnitude: 2.6
Apparent Magnitude: 13.6
Right Ascension(RA) 295.4824
Declination (DEC) 48.5244
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
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-1638%20b/
Kepler-1638 b
Kepler-1638 b

  • Kepler-1638 b is an exoplanet orbiting the star Kepler-1638, located about 4979.1 light-years (1526.6 pc) away from Solar System. Its discovery was publicly announced on 2016.
  • The host star Kepler-1638 has apparent magnitude of 13.6, with absolute magnitude of 2.6.
  • It is 1.0 times more massive and 1.7 times bigger compared with our Sun. The surface temperature is 5488 with its spectral types of G4
  • In this planetary system, the extrasolar planet Kepler-1638 b orbits around the star Kepler-1638 every 259.3 days with its orbital distance of 0.79 AU ( 117859693.0 km)
  • (Projected orbit of Kepler-1638 b around its host star Kepler-1638)


  • The Star Kepler-1638 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.118 AU ( 167202851.9 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.545 AU ( 231118036.7 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.354 AU ( 352172741.6 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 3.464 AU ( 518237617.0 km)
  • Radiation at Planetary Boundary of Kepler-1638 b : 5258.92 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-1638)



  • Kopparapu Recent Venus for Star Kepler-1638 distance : 1.178 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-1638 distance : 1.492 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-1638 distance : 1.441 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-1638 distance : 1.580 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1638 distance : 2.657 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-1638 distance : 2.803 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-1638)



  • Original Kopparapu Recent Venus for Star Kepler-1638 distance : 1.174 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-1638 distance : 1.535 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-1638 distance : 1.553 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1638 distance : 2.703 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-1638 distance : 2.811 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-1638)



    (Position in Stellar Map of star Kepler-1638 and its Exoplanet Kepler-1638 b)



    (Zoomed position in Stellar Map of star Kepler-1638 and its Exoplanet Kepler-1638 b (zoom level 3))