Imaginary Picture of Kepler-1255 b

Display orbital revolution of Kepler-1255 b around the hoststar Kepler-1255
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Exoplanet Name : Kepler-1255 b
Alternate Name : "2MASS J19405742+4243353 b, K02487.01, KIC 7212184 b, KOI-2487 b, KOI-2487.01, WISE J194057.42+424335.3 b"
Status : Confirmed
Radius (Rjup / Re): 0.2070 (Rjup) 2.3203 (Rearth)
Mass (Mjup / Me): 0.0182 (Mjup) 5.7712 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.2201 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0994
Orbital Period(Observed/Estimated) 36.29 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 1.0720
Star Radiation at Atmospheric Boundary: 55450.0 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 684.9 (K)
Blackbody T 0.3(K) 643.2 (K)
Blackbody T 0.7(K) 520.4 (K)
Tidally Locked Blackbody T 0.1(K) 814.5 (K)
Tidally Locked Blackbody T 0.3(K) 764.9 (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-1255
Alternate Name : "2MASS J19405742+4243353, KIC 7212184, KOI-2487, WISE J194057.42+424335.3"
Star Distance(LY) : 5289.5
Stellar Radius(Rsun) : 1.4 (Rsun Measured)
Stellar Mass(Msun) : 1.1 (Msun Measured) 1.1 (Msun Estimated)
Star Age : 3.5 (GY)
Temperature : 5847 (K)
Spectral type : G0
UV portion[%]: 7.8
Visible portion[%]: 44.8
IR portion[%]: 47.4
Metalicity : 0.0
Absolute Magnitude: 3.0
Apparent Magnitude: 14.0
Right Ascension(RA) 295.2393
Declination (DEC) 42.7265
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-1255+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-1255%20b/
Kepler-1255 b
Kepler-1255 b

  • Kepler-1255 b is an exoplanet orbiting the star Kepler-1255, located about 5289.5 light-years (1621.8 pc) away from Solar System. Its discovery was publicly announced on 2016.
  • The host star Kepler-1255 has apparent magnitude of 14.0, with absolute magnitude of 3.0.
  • It is 1.1 times more massive and 1.4 times bigger compared with our Sun. The surface temperature is 5847 with its spectral types of G0
  • In this planetary system, the extrasolar planet Kepler-1255 b orbits around the star Kepler-1255 every 36.3 days with its orbital distance of 0.22 AU ( 32926577.1 km)
  • (Projected orbit of Kepler-1255 b around its host star Kepler-1255)


  • The Star Kepler-1255 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.014 AU ( 151679800.3 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.401 AU ( 209661122.7 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.136 AU ( 319477153.1 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 3.143 AU ( 470124626.2 km)
  • Radiation at Planetary Boundary of Kepler-1255 b : 55450.02 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-1255)



  • Kopparapu Recent Venus for Star Kepler-1255 distance : 1.047 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-1255 distance : 1.325 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-1255 distance : 1.280 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-1255 distance : 1.403 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1255 distance : 2.336 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-1255 distance : 2.464 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-1255)



  • Original Kopparapu Recent Venus for Star Kepler-1255 distance : 1.049 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-1255 distance : 1.362 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-1255 distance : 1.388 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1255 distance : 2.377 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-1255 distance : 2.472 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-1255)



    (Position in Stellar Map of star Kepler-1255 and its Exoplanet Kepler-1255 b)



    (Zoomed position in Stellar Map of star Kepler-1255 and its Exoplanet Kepler-1255 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-1255*)
    *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