Imaginary Picture of Kepler-242 b

Display orbital revolution of Kepler-242 b around the hoststar Kepler-242
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Exoplanet Name : Kepler-242 b
Alternate Name : "2MASS J19061576+4148302 b, K00853.01, KIC 6428700 b, KOI-853 b, KOI-853.01, WISE J190615.76+414830.2 b"
Status : Confirmed
Radius (Rjup / Re): 0.2330 (Rjup) 2.6117 (Rearth)
Mass (Mjup / Me): 0.0203 (Mjup) 6.4425 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0750 (AU) 0.0750 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0225
Orbital Period(Observed/Estimated) 8.20 (Days Obs.) 17.68 (Days Est.)
Surface Gravity (G Earth) 0.9445
Star Radiation at Atmospheric Boundary: 57488.2 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 691.1 (K)
Blackbody T 0.3(K) 649.0 (K)
Blackbody T 0.7(K) 525.1 (K)
Tidally Locked Blackbody T 0.1(K) 821.9 (K)
Tidally Locked Blackbody T 0.3(K) 771.8 (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-242
Alternate Name : "2MASS J19061576+4148302, KIC 6428700, KOI-853, WISE J190615.76+414830.2"
Star Distance(LY) : 1958.0
Stellar Radius(Rsun) : 0.7 (Rsun Measured)
Stellar Mass(Msun) : 0.2 (Msun Measured) 0.8 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 4876 (K)
Spectral type : K2
UV portion[%]: 3.4
Visible portion[%]: 37.3
IR portion[%]: 59.3
Metalicity : 0.1
Absolute Magnitude: 4.9
Apparent Magnitude: 13.8
Right Ascension(RA) 286.5657
Declination (DEC) 41.8084
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-242+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-242%20b/
Kepler-242 b
Kepler-242 b

  • Kepler-242 b is an exoplanet orbiting the star Kepler-242, located about 1958.0 light-years (600.3 pc) away from Solar System. Its discovery was publicly announced on 2014.
  • The host star Kepler-242 has apparent magnitude of 13.8, with absolute magnitude of 4.9.
  • It is 0.2 times more massive and 0.7 times bigger compared with our Sun. The surface temperature is 4876 with its spectral types of K2
  • In this planetary system, the extrasolar planet Kepler-242 b orbits around the star Kepler-242 every 8.2 days with its orbital distance of 0.07 AU ( 11219840.3 km)
  • (Projected orbit of Kepler-242 b around its host star Kepler-242)


  • The Star Kepler-242 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.352 AU ( 52626708.7 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.486 AU ( 72743864.5 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.741 AU ( 110845551.2 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.090 AU ( 163114084.5 km)
  • Radiation at Planetary Boundary of Kepler-242 b : 57488.17 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-242)



  • Kopparapu Recent Venus for Star Kepler-242 distance : 0.383 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-242 distance : 0.485 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-242 distance : 0.468 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-242 distance : 0.514 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-242 distance : 0.883 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-242 distance : 0.931 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-242)



  • Original Kopparapu Recent Venus for Star Kepler-242 distance : 0.378 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-242 distance : 0.500 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-242 distance : 0.501 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-242 distance : 0.897 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-242 distance : 0.933 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-242)



    (Position in Stellar Map of star Kepler-242 and its Exoplanet Kepler-242 b)



    (Zoomed position in Stellar Map of star Kepler-242 and its Exoplanet Kepler-242 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-242*)
    *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