Imaginary Picture of Kepler-338 b
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Exoplanet Name : Kepler-338 b
Alternate Name :
Radius (Rjup / Re): 0.2300 (Rjup) 2.5781 (Rearth)
Mass (Mjup / Me): 0.0963 (Mjup) 30.6174 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.1170 (AU) 0.1170 (AU Est.)
Eccentricity : 0.0400
Orbital Period(Yrs) 0.0376
Orbital Period(Observed/Estimated) 13.73 (Days Obs.) 13.94 (Days Est.)
Star Radiation at Atmospheric Boundary: 341161.0 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1078.7 (K)
Blackbody T 0.3(K) 1013.0 (K)
Blackbody T 0.7(K) 819.6 (K)
Tidally Locked Blackbody T 0.1(K) 1282.7 (K)
Tidally Locked Blackbody T 0.3(K) 1204.6 (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-338
Alternate Name :
Star Distance(LY) : 1630.8
Stellar Radius(Rsun) : 1.8 (Rsun Measured)
Stellar Mass(Msun) : 1.1 (Msun Measured) 1.1 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5898 (K)
Spectral type : G1
Metalicity : -0.1
Absolute Magnitude: 2.6
Apparent Magnitude: 11.1
Right Ascension(RA) 282.9789
Declination (DEC) 40.7843
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors "Rowe,ason.; Bryson,tephen.; Marcy,eoffrey.; Lissauer,ack.; Jontof-Hutter,aniel; Mullally,ergal; Gilliland,onald.; Issacson,oward; Ford,ric; Howell,teve.; Borucki,illiam.; Haas,ichael; Huber,aniel; Steffen,ason.; Thompson,usan.; Quintana,lisa; Barclay,homas; Still,artin; Fortney,onathan; Gautier,..,II; Hunter,oger; Caldwell,ouglas.; Ciardi,avid.; Devore,dna; Cochran,illiam; Jenkins,on; Agol,ric; Carter,oshua.; Geary,ohn"
Discovery Paper - Title Validation of Kepler's Multiple Planet Candidates. III. Light Curve Analysis and Announcement of Hundreds of New Multi-planet Systems
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Kepler-338+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-338%20b/
Kepler-338 b
Kepler-338 b

  • Kepler-338 b is an exoplanet orbiting the star Kepler-338, located about 1630.8 light-years (500.0 pc) away from Solar System. Its discovery was publicly announced on 2014.
  • The host star Kepler-338 has apparent magnitude of 11.1, with absolute magnitude of 2.6.
  • It is 1.1 times more massive and 1.8 times bigger compared with our Sun. The surface temperature is 5898 with its spectral types of G1
  • In this planetary system, the extrasolar planet Kepler-338 b orbits around the star Kepler-338 every 13.7 days with its orbital distance of 0.12 AU ( 17502950.9 km)
  • (Projected orbit of Kepler-338 b around its host star Kepler-338)


  • The Star Kepler-338 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.337 AU ( 199995979.1 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.848 AU ( 276446708.4 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.816 AU ( 421243606.0 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 4.144 AU ( 619878419.8 km)
  • Radiation at Planetary Boundary of Kepler-338 b : 341161.01 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-338)



  • Kopparapu Recent Venus for Star Kepler-338 distance : 1.376 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-338 distance : 1.742 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-338 distance : 1.682 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-338 distance : 1.844 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-338 distance : 3.067 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-338 distance : 3.235 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-338)



  • Original Kopparapu Recent Venus for Star Kepler-338 distance : 1.381 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-338 distance : 1.789 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-338 distance : 1.827 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-338 distance : 3.121 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-338 distance : 3.246 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-338)



    (Position in Stellar Map of star Kepler-338 and its Exoplanet Kepler-338 b)



    (Zoomed position in Stellar Map of star Kepler-338 and its Exoplanet Kepler-338 b (zoom level 3))