Imaginary Picture of Kepler-42 c

Display orbital revolution of Kepler-42 c around the hoststar Kepler-42
/
Exoplanet Name : Kepler-42 c
Alternate Name : "2MASS J19285255+4437096 c, K00961.02, KIC 8561063 c, KOI-961 c, KOI-961.02, WISE J192852.66+443704.5 c"
Status : Confirmed
Radius (Rjup / Re): 0.0650 (Rjup) 0.7286 (Rearth)
Mass (Mjup / Me): 0.0060 (Mjup) 1.9076 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0060 (AU) 0.0060 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0012
Orbital Period(Observed/Estimated) 0.45 (Days Obs.) 0.47 (Days Est.)
Surface Gravity (G Earth) 3.5936
Star Radiation at Atmospheric Boundary: 108685.3 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 810.4 (K)
Blackbody T 0.3(K) 761.0 (K)
Blackbody T 0.7(K) 615.8 (K)
Tidally Locked Blackbody T 0.1(K) 963.7 (K)
Tidally Locked Blackbody T 0.3(K) 905.0 (K)
Size Class: 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-42
Alternate Name : "2MASS J19285255+4437096, KIC 8561063, KOI-961, WISE J192852.66+443704.5"
Star Distance(LY) : 130.7
Stellar Radius(Rsun) : 0.2 (Rsun Measured)
Stellar Mass(Msun) : 0.1 (Msun Measured) 0.1 (Msun Estimated)
Star Age : 4.5 (GY)
Temperature : 3204 (K)
Spectral type : M
UV portion[%]: 0.1
Visible portion[%]: 6.6
IR portion[%]: 93.3
Metalicity : -0.3
Absolute Magnitude: 13.1
Apparent Magnitude: 16.1
Right Ascension(RA) 292.2190
Declination (DEC) 44.6192
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-42+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-42%20c/
Kepler-42 c
Kepler-42 c

  • Kepler-42 c is an exoplanet orbiting the star Kepler-42, located about 130.7 light-years (40.1 pc) away from Solar System. Its discovery was publicly announced on 2011.
  • The host star Kepler-42 has apparent magnitude of 16.1, with absolute magnitude of 13.1.
  • It is 0.1 times more massive and 0.2 times bigger compared with our Sun. The surface temperature is 3204 with its spectral types of M
  • In this planetary system, the extrasolar planet Kepler-42 c orbits around the star Kepler-42 every 0.5 days with its orbital distance of 0.01 AU ( 897587.2 km)
  • (Projected orbit of Kepler-42 c around its host star Kepler-42)


  • The Star Kepler-42 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.039 AU ( 5788851.1 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.053 AU ( 8001705.0 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.082 AU ( 12192827.6 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.120 AU ( 17942279.9 km)
  • Radiation at Planetary Boundary of Kepler-42 c : 108685.31 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-42)



  • Kopparapu Recent Venus for Star Kepler-42 distance : 0.044 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-42 distance : 0.056 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-42 distance : 0.054 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-42 distance : 0.059 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-42 distance : 0.110 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-42 distance : 0.116 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-42)



  • Original Kopparapu Recent Venus for Star Kepler-42 distance : 0.044 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-42 distance : 0.058 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-42 distance : 0.058 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-42 distance : 0.111 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-42 distance : 0.116 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-42)



    (Position in Stellar Map of star Kepler-42 and its Exoplanet Kepler-42 c)



    (Zoomed position in Stellar Map of star Kepler-42 and its Exoplanet Kepler-42 c (zoom level 3))

    (Synthetic Spectrum of star Kepler-42*)
    *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