Imaginary Picture of Kepler-1256 b

Display orbital revolution of Kepler-1256 b around the hoststar Kepler-1256
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Exoplanet Name : Kepler-1256 b
Alternate Name : "2MASS J19255383+4441006 b, K02488.01, KIC 8559152 b, KOI-2488 b, KOI-2488.01, WISE J192553.82+444100.3 b"
Status : Confirmed
Radius (Rjup / Re): 0.1330 (Rjup) 1.4908 (Rearth)
Mass (Mjup / Me): 0.0131 (Mjup) 4.1610 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.1106 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0340
Orbital Period(Observed/Estimated) 12.41 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 1.8722
Star Radiation at Atmospheric Boundary: 267065.9 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1014.6 (K)
Blackbody T 0.3(K) 952.8 (K)
Blackbody T 0.7(K) 770.9 (K)
Tidally Locked Blackbody T 0.1(K) 1206.6 (K)
Tidally Locked Blackbody T 0.3(K) 1133.1 (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-1256
Alternate Name : "2MASS J19255383+4441006, KIC 8559152, KOI-2488, WISE J192553.82+444100.3"
Star Distance(LY) : 2905.2
Stellar Radius(Rsun) : 1.4 (Rsun Measured)
Stellar Mass(Msun) : 1.2 (Msun Measured) 1.2 (Msun Estimated)
Star Age : 3.7 (GY)
Temperature : 5994 (K)
Spectral type : G0
UV portion[%]: 7.8
Visible portion[%]: 44.8
IR portion[%]: 47.4
Metalicity : 0.1
Absolute Magnitude: 2.7
Apparent Magnitude: 12.5
Right Ascension(RA) 291.4743
Declination (DEC) 44.6835
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. Batalha15"
Discovery Paper - Title FALSE POSITIVE PROBABILITIES FOR ALL KEPLER OBJECTS OF INTEREST: 1284 NEWLY VALIDATED PLANETS AND 449 LIKELY FALSE POSITIVES
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Kepler-1256+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-1256%20b/
Kepler-1256 b
Kepler-1256 b

  • Kepler-1256 b is an exoplanet orbiting the star Kepler-1256, located about 2905.2 light-years (890.7 pc) away from Solar System. Its discovery was publicly announced on 2016.
  • The host star Kepler-1256 has apparent magnitude of 12.5, with absolute magnitude of 2.7.
  • It is 1.2 times more massive and 1.4 times bigger compared with our Sun. The surface temperature is 5994 with its spectral types of G0
  • In this planetary system, the extrasolar planet Kepler-1256 b orbits around the star Kepler-1256 every 12.4 days with its orbital distance of 0.11 AU ( 16538894.7 km)
  • (Projected orbit of Kepler-1256 b around its host star Kepler-1256)


  • The Star Kepler-1256 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.118 AU ( 167203756.2 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.545 AU ( 231119286.7 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.354 AU ( 352174646.3 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 3.464 AU ( 518240419.8 km)
  • Radiation at Planetary Boundary of Kepler-1256 b : 267065.94 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-1256)



  • Kopparapu Recent Venus for Star Kepler-1256 distance : 1.143 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-1256 distance : 1.448 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-1256 distance : 1.398 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-1256 distance : 1.533 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1256 distance : 2.543 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-1256 distance : 2.682 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-1256)



  • Original Kopparapu Recent Venus for Star Kepler-1256 distance : 1.150 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-1256 distance : 1.487 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-1256 distance : 1.522 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1256 distance : 2.588 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-1256 distance : 2.692 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-1256)



    (Position in Stellar Map of star Kepler-1256 and its Exoplanet Kepler-1256 b)



    (Zoomed position in Stellar Map of star Kepler-1256 and its Exoplanet Kepler-1256 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-1256*)
    *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