Imaginary Picture of Kepler-1447 b

Display orbital revolution of Kepler-1447 b around the hoststar Kepler-1447
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Exoplanet Name : Kepler-1447 b
Alternate Name : "2MASS J19183442+5043375 b, K03260.01, KIC 12156174 b, KOI-3260 b, KOI-3260.01, WISE J191834.42+504337.3 b"
Status : Confirmed
Radius (Rjup / Re): 0.2590 (Rjup) 2.9031 (Rearth)
Mass (Mjup / Me): 0.0224 (Mjup) 7.1085 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.2858 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.1552
Orbital Period(Observed/Estimated) 56.67 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 0.8434
Star Radiation at Atmospheric Boundary: 13917.1 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 484.8 (K)
Blackbody T 0.3(K) 455.2 (K)
Blackbody T 0.7(K) 368.3 (K)
Tidally Locked Blackbody T 0.1(K) 576.5 (K)
Tidally Locked Blackbody T 0.3(K) 541.4 (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-1447
Alternate Name : "2MASS J19183442+5043375, KIC 12156174, KOI-3260, WISE J191834.42+504337.3"
Star Distance(LY) : 2903.5
Stellar Radius(Rsun) : 1.0 (Rsun Measured)
Stellar Mass(Msun) : 1.0 (Msun Measured) 1.0 (Msun Estimated)
Star Age : 4.2 (GY)
Temperature : 5546 (K)
Spectral type : G4
UV portion[%]: 7.1
Visible portion[%]: 43.5
IR portion[%]: 49.4
Metalicity : -0.0
Absolute Magnitude: 3.8
Apparent Magnitude: 13.5
Right Ascension(RA) 289.6434
Declination (DEC) 50.7271
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-1447+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-1447%20b/
Kepler-1447 b
Kepler-1447 b

  • Kepler-1447 b is an exoplanet orbiting the star Kepler-1447, located about 2903.5 light-years (890.2 pc) away from Solar System. Its discovery was publicly announced on 2016.
  • The host star Kepler-1447 has apparent magnitude of 13.5, with absolute magnitude of 3.8.
  • It is 1.0 times more massive and 1.0 times bigger compared with our Sun. The surface temperature is 5546 with its spectral types of G4
  • In this planetary system, the extrasolar planet Kepler-1447 b orbits around the star Kepler-1447 every 56.7 days with its orbital distance of 0.29 AU ( 42761093.8 km)
  • (Projected orbit of Kepler-1447 b around its host star Kepler-1447)


  • The Star Kepler-1447 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.660 AU ( 98685429.9 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.912 AU ( 136409053.8 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.389 AU ( 207857210.7 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.045 AU ( 305870991.2 km)
  • Radiation at Planetary Boundary of Kepler-1447 b : 13917.07 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-1447)



  • Kopparapu Recent Venus for Star Kepler-1447 distance : 0.693 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-1447 distance : 0.878 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-1447 distance : 0.848 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-1447 distance : 0.930 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1447 distance : 1.560 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-1447 distance : 1.646 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-1447)



  • Original Kopparapu Recent Venus for Star Kepler-1447 distance : 0.691 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-1447 distance : 0.903 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-1447 distance : 0.914 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1447 distance : 1.587 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-1447 distance : 1.651 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-1447)



    (Position in Stellar Map of star Kepler-1447 and its Exoplanet Kepler-1447 b)



    (Zoomed position in Stellar Map of star Kepler-1447 and its Exoplanet Kepler-1447 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-1447*)
    *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