Imaginary Picture of Kepler-243 b

Display orbital revolution of Kepler-243 b around the hoststar Kepler-243
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Exoplanet Name : Kepler-243 b
Alternate Name : "2MASS J19002651+4202022 b, K00857.01, KIC 6587280 b, KOI-857 b, KOI-857.01, WISE J190026.50+420202.2 b"
Status : Confirmed
Radius (Rjup / Re): 0.2190 (Rjup) 2.4548 (Rearth)
Mass (Mjup / Me): 0.0191 (Mjup) 6.0817 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0620 (AU) 0.0620 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0156
Orbital Period(Observed/Estimated) 5.72 (Days Obs.) 5.98 (Days Est.)
Surface Gravity (G Earth) 1.0093
Star Radiation at Atmospheric Boundary: 152993.5 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 882.7 (K)
Blackbody T 0.3(K) 828.9 (K)
Blackbody T 0.7(K) 670.7 (K)
Tidally Locked Blackbody T 0.1(K) 1049.7 (K)
Tidally Locked Blackbody T 0.3(K) 985.8 (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-243
Alternate Name : "2MASS J19002651+4202022, KIC 6587280, KOI-857, WISE J190026.50+420202.2"
Star Distance(LY) : 2262.4
Stellar Radius(Rsun) : 0.8 (Rsun Measured)
Stellar Mass(Msun) : 0.9 (Msun Measured) 1.0 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5149 (K)
Spectral type : K0
UV portion[%]: 4.4
Visible portion[%]: 39.3
IR portion[%]: 56.3
Metalicity : 0.2
Absolute Magnitude: 4.4
Apparent Magnitude: 13.6
Right Ascension(RA) 285.1105
Declination (DEC) 42.0340
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-243+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-243%20b/
Kepler-243 b
Kepler-243 b

  • Kepler-243 b is an exoplanet orbiting the star Kepler-243, located about 2262.4 light-years (693.7 pc) away from Solar System. Its discovery was publicly announced on 2014.
  • The host star Kepler-243 has apparent magnitude of 13.6, with absolute magnitude of 4.4.
  • It is 0.9 times more massive and 0.8 times bigger compared with our Sun. The surface temperature is 5149 with its spectral types of K0
  • In this planetary system, the extrasolar planet Kepler-243 b orbits around the star Kepler-243 every 5.7 days with its orbital distance of 0.06 AU ( 9275068.0 km)
  • (Projected orbit of Kepler-243 b around its host star Kepler-243)


  • The Star Kepler-243 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.474 AU ( 70971493.3 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.656 AU ( 98101150.9 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.999 AU ( 149484444.2 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.470 AU ( 219972908.1 km)
  • Radiation at Planetary Boundary of Kepler-243 b : 152993.54 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-243)



  • Kopparapu Recent Venus for Star Kepler-243 distance : 0.509 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-243 distance : 0.645 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-243 distance : 0.623 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-243 distance : 0.684 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-243 distance : 1.162 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-243 distance : 1.226 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-243)



  • Original Kopparapu Recent Venus for Star Kepler-243 distance : 0.505 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-243 distance : 0.664 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-243 distance : 0.668 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-243 distance : 1.182 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-243 distance : 1.229 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-243)



    (Position in Stellar Map of star Kepler-243 and its Exoplanet Kepler-243 b)



    (Zoomed position in Stellar Map of star Kepler-243 and its Exoplanet Kepler-243 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-243*)
    *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