Imaginary Picture of Kepler-448 b
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Exoplanet Name : Kepler-448 b
Alternate Name : KOI-12 b
Radius (Rjup / Re): 1.4300 (Rjup) 16.0289 (Rearth)
Mass (Mjup / Me): 10.0000 (Mjup) 3179.3800 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.1510 (AU) 0.1510 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0489
Orbital Period(Observed/Estimated) 17.86 (Days Obs.) 17.79 (Days Est.)
Star Radiation at Atmospheric Boundary: 261800.8 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1009.6 (K)
Blackbody T 0.3(K) 948.1 (K)
Blackbody T 0.7(K) 767.1 (K)
Tidally Locked Blackbody T 0.1(K) 1200.6 (K)
Tidally Locked Blackbody T 0.3(K) 1127.5 (K)
Size Class: Super-Jupiter-size
Mass Class:
Detection Type : Primary Transit
Mass Detection : Spectrum
Radius Detection : Primary Transit
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : KOI-12
Alternate Name : Kepler-448
Star Distance(LY) : 1302.4
Stellar Radius(Rsun) : 1.5 (Rsun Measured)
Stellar Mass(Msun) : 1.5 (Msun Measured) 1.4 (Msun Estimated)
Star Age : 1.5 (GY)
Temperature : 6820 (K)
Spectral type : F3
Metalicity : 0.0
Absolute Magnitude: 3.5
Apparent Magnitude: 11.5
Right Ascension(RA) 297.4537
Declination (DEC) 41.0110
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors 0
Discovery Paper - Title 0
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Kepler-448+&submit=SIMBAD+search
Open Exoplanet Database Link 0
Kepler-448 b
Kepler-448 b

  • Kepler-448 b is an exoplanet orbiting the star KOI-12, located about 1302.4 light-years (399.3 pc) away from Solar System. Its discovery was publicly announced on 2015.
  • The host star KOI-12 has apparent magnitude of 11.5, with absolute magnitude of 3.5.
  • It is 1.5 times more massive and 1.5 times bigger compared with our Sun. The surface temperature is 6820 with its spectral types of F3
  • In this planetary system, the extrasolar planet Kepler-448 b orbits around the star KOI-12 every 17.9 days with its orbital distance of 0.15 AU ( 22589278.5 km)
  • (Projected orbit of Kepler-448 b around its host star KOI-12)


  • The Star KOI-12 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.511 AU ( 226109141.4 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 2.089 AU ( 312541922.8 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 3.183 AU ( 476244724.9 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 4.685 AU ( 700814975.7 km)
  • Radiation at Planetary Boundary of Kepler-448 b : 261800.78 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star KOI-12)



  • Kopparapu Recent Venus for Star KOI-12 distance : 1.474 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star KOI-12 distance : 1.866 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star KOI-12 distance : 1.802 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star KOI-12 distance : 1.974 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star KOI-12 distance : 3.233 AU
  • Kopparapu Outer Boundary for Early Mars for Star KOI-12 distance : 3.410 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star KOI-12)



  • Original Kopparapu Recent Venus for Star KOI-12 distance : 1.509 AU
  • Original Kopparapu Runaway Greenhouse for Star KOI-12 distance : 1.911 AU
  • Original Kopparapu Moist Greenhouse for Star KOI-12 distance : 1.997 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star KOI-12 distance : 3.292 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star KOI-12 distance : 3.424 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star KOI-12)



    (Position in Stellar Map of star KOI-12 and its Exoplanet Kepler-448 b)



    (Zoomed position in Stellar Map of star KOI-12 and its Exoplanet Kepler-448 b (zoom level 3))