Imaginary Picture of Kepler-187 b

Display orbital revolution of Kepler-187 b around the hoststar Kepler-187
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Exoplanet Name : Kepler-187 b
Alternate Name : "2MASS J19591114+4405215 b, K00572.02, KIC 8193178 b, KOI-572 b, KOI-572.02, WISE J195911.15+440521.4 b"
Status : Confirmed
Radius (Rjup / Re): 0.1260 (Rjup) 1.4123 (Rearth)
Mass (Mjup / Me): 0.0107 (Mjup) 3.4131 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0590 (AU) 0.0590 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0135
Orbital Period(Observed/Estimated) 4.94 (Days Obs.) 5.68 (Days Est.)
Surface Gravity (G Earth) 1.7111
Star Radiation at Atmospheric Boundary: 1186981.8 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1473.2 (K)
Blackbody T 0.3(K) 1383.5 (K)
Blackbody T 0.7(K) 1119.4 (K)
Tidally Locked Blackbody T 0.1(K) 1751.9 (K)
Tidally Locked Blackbody T 0.3(K) 1645.2 (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-187
Alternate Name : "2MASS J19591114+4405215, KIC 8193178, KOI-572, WISE J195911.15+440521.4"
Star Distance(LY) : 3728.7
Stellar Radius(Rsun) : 1.6 (Rsun Measured)
Stellar Mass(Msun) : 0.8 (Msun Measured) 1.1 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5997 (K)
Spectral type : G0
UV portion[%]: 7.8
Visible portion[%]: 44.8
IR portion[%]: 47.4
Metalicity : -0.3
Absolute Magnitude: 2.7
Apparent Magnitude: 13.0
Right Ascension(RA) 299.7965
Declination (DEC) 44.0893
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-187+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-187%20b/
Kepler-187 b
Kepler-187 b

  • Kepler-187 b is an exoplanet orbiting the star Kepler-187, located about 3728.7 light-years (1143.2 pc) away from Solar System. Its discovery was publicly announced on 2014.
  • The host star Kepler-187 has apparent magnitude of 13.0, with absolute magnitude of 2.7.
  • It is 0.8 times more massive and 1.6 times bigger compared with our Sun. The surface temperature is 5997 with its spectral types of G0
  • In this planetary system, the extrasolar planet Kepler-187 b orbits around the star Kepler-187 every 4.9 days with its orbital distance of 0.06 AU ( 8826274.4 km)
  • (Projected orbit of Kepler-187 b around its host star Kepler-187)


  • The Star Kepler-187 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.257 AU ( 188117734.8 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.738 AU ( 260027870.5 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.649 AU ( 396224930.6 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 3.898 AU ( 583062342.9 km)
  • Radiation at Planetary Boundary of Kepler-187 b : 1186981.75 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-187)



  • Kopparapu Recent Venus for Star Kepler-187 distance : 1.286 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-187 distance : 1.629 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-187 distance : 1.573 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-187 distance : 1.724 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-187 distance : 2.861 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-187 distance : 3.017 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-187)



  • Original Kopparapu Recent Venus for Star Kepler-187 distance : 1.294 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-187 distance : 1.672 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-187 distance : 1.712 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-187 distance : 2.911 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-187 distance : 3.028 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-187)



    (Position in Stellar Map of star Kepler-187 and its Exoplanet Kepler-187 b)



    (Zoomed position in Stellar Map of star Kepler-187 and its Exoplanet Kepler-187 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-187*)
    *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