Imaginary Picture of Kepler-1227 b

Display orbital revolution of Kepler-1227 b around the hoststar Kepler-1227
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Exoplanet Name : Kepler-1227 b
Alternate Name : "2MASS J19081593+4152296 b, K02408.01, KIC 6429812 b, KOI-2408 b, KOI-2408.01, WISE J190815.94+415229.7 b"
Status : Confirmed
Radius (Rjup / Re): 0.2040 (Rjup) 2.2866 (Rearth)
Mass (Mjup / Me): 0.0179 (Mjup) 5.6933 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.4013 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.2581
Orbital Period(Observed/Estimated) 94.29 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 1.0889
Star Radiation at Atmospheric Boundary: 5934.7 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 391.7 (K)
Blackbody T 0.3(K) 367.9 (K)
Blackbody T 0.7(K) 297.7 (K)
Tidally Locked Blackbody T 0.1(K) 465.9 (K)
Tidally Locked Blackbody T 0.3(K) 437.5 (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-1227
Alternate Name : "2MASS J19081593+4152296, KIC 6429812, KOI-2408, WISE J190815.94+415229.7"
Star Distance(LY) : 2033.4
Stellar Radius(Rsun) : 0.9 (Rsun Measured)
Stellar Mass(Msun) : 1.0 (Msun Measured) 1.0 (Msun Estimated)
Star Age : 4.2 (GY)
Temperature : 5485 (K)
Spectral type : G3
UV portion[%]: 6.8
Visible portion[%]: 43.1
IR portion[%]: 50.1
Metalicity : -0.0
Absolute Magnitude: 4.0
Apparent Magnitude: 13.0
Right Ascension(RA) 287.0664
Declination (DEC) 41.8749
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors "Timothy D. Morton1, Stephen T. Bryson2, Jeffrey L. Coughlin2,3, Jason F. Rowe4, Ganesh Ravichandran5, Erik A. Petigura6,7, Michael R. Haas2, and Natalie M. Batalha14"
Discovery Paper - Title FALSE POSITIVE PROBABILITIES FOR ALL KEPLER OBJECTS OF INTEREST: 1284 NEWLY VALIDATED PLANETS AND 448 LIKELY FALSE POSITIVES
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Kepler-1227+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-1227%20b/
Kepler-1227 b
Kepler-1227 b

  • Kepler-1227 b is an exoplanet orbiting the star Kepler-1227, located about 2033.4 light-years (623.4 pc) away from Solar System. Its discovery was publicly announced on 2016.
  • The host star Kepler-1227 has apparent magnitude of 13.0, with absolute magnitude of 4.0.
  • It is 1.0 times more massive and 0.9 times bigger compared with our Sun. The surface temperature is 5485 with its spectral types of G3
  • In this planetary system, the extrasolar planet Kepler-1227 b orbits around the star Kepler-1227 every 94.3 days with its orbital distance of 0.40 AU ( 60038400.9 km)
  • (Projected orbit of Kepler-1227 b around its host star Kepler-1227)


  • The Star Kepler-1227 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.605 AU ( 90481408.5 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.836 AU ( 125068952.2 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.274 AU ( 190577405.4 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.875 AU ( 280443000.7 km)
  • Radiation at Planetary Boundary of Kepler-1227 b : 5934.72 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-1227)



  • Kopparapu Recent Venus for Star Kepler-1227 distance : 0.638 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-1227 distance : 0.808 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-1227 distance : 0.780 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-1227 distance : 0.855 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1227 distance : 1.438 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-1227 distance : 1.517 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-1227)



  • Original Kopparapu Recent Venus for Star Kepler-1227 distance : 0.635 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-1227 distance : 0.831 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-1227 distance : 0.840 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1227 distance : 1.463 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-1227 distance : 1.522 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-1227)



    (Position in Stellar Map of star Kepler-1227 and its Exoplanet Kepler-1227 b)



    (Zoomed position in Stellar Map of star Kepler-1227 and its Exoplanet Kepler-1227 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-1227*)
    *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