Imaginary Picture of Kepler-211 b

Display orbital revolution of Kepler-211 b around the hoststar Kepler-211
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Exoplanet Name : Kepler-211 b
Alternate Name : "2MASS J19014539+4310065 b, K00678.02, KIC 7509886 b, KOI-678 b, KOI-678.02, WISE J190145.38+431006.6 b"
Status : Confirmed
Radius (Rjup / Re): 0.1120 (Rjup) 1.2554 (Rearth)
Mass (Mjup / Me): 0.0070 (Mjup) 2.2217 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0480 (AU) 0.0480 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0113
Orbital Period(Observed/Estimated) 4.14 (Days Obs.) 3.90 (Days Est.)
Surface Gravity (G Earth) 1.4097
Star Radiation at Atmospheric Boundary: 229077.7 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 976.4 (K)
Blackbody T 0.3(K) 917.0 (K)
Blackbody T 0.7(K) 741.9 (K)
Tidally Locked Blackbody T 0.1(K) 1161.2 (K)
Tidally Locked Blackbody T 0.3(K) 1090.5 (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-211
Alternate Name : "2MASS J19014539+4310065, KIC 7509886, KOI-678, WISE J190145.38+431006.6"
Star Distance(LY) : 1008.7
Stellar Radius(Rsun) : 0.8 (Rsun Measured)
Stellar Mass(Msun) : 1.0 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5194 (K)
Spectral type : K1
UV portion[%]: 4.9
Visible portion[%]: 40.0
IR portion[%]: 55.0
Metalicity : 0.1
Absolute Magnitude: 4.5
Apparent Magnitude: 11.9
Right Ascension(RA) 285.4392
Declination (DEC) 43.1685
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors 0
Discovery Paper - Title
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Kepler-211+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-211%20b/
Kepler-211 b
Kepler-211 b

  • Kepler-211 b is an exoplanet orbiting the star Kepler-211, located about 1008.7 light-years (309.3 pc) away from Solar System. Its discovery was publicly announced on 2014.
  • The host star Kepler-211 has apparent magnitude of 11.9, with absolute magnitude of 4.5.
  • It is 1.0 times more massive and 0.8 times bigger compared with our Sun. The surface temperature is 5194 with its spectral types of K1
  • In this planetary system, the extrasolar planet Kepler-211 b orbits around the star Kepler-211 every 4.1 days with its orbital distance of 0.05 AU ( 7180697.8 km)
  • (Projected orbit of Kepler-211 b around its host star Kepler-211)


  • The Star Kepler-211 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.449 AU ( 67233906.0 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.621 AU ( 92934828.5 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.947 AU ( 141612112.1 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.393 AU ( 208388426.6 km)
  • Radiation at Planetary Boundary of Kepler-211 b : 229077.69 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-211)



  • Kopparapu Recent Venus for Star Kepler-211 distance : 0.481 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-211 distance : 0.610 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-211 distance : 0.589 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-211 distance : 0.646 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-211 distance : 1.097 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-211 distance : 1.157 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-211)



  • Original Kopparapu Recent Venus for Star Kepler-211 distance : 0.477 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-211 distance : 0.628 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-211 distance : 0.632 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-211 distance : 1.115 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-211 distance : 1.160 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-211)



    (Position in Stellar Map of star Kepler-211 and its Exoplanet Kepler-211 b)



    (Zoomed position in Stellar Map of star Kepler-211 and its Exoplanet Kepler-211 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-211*)
    *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