Imaginary Picture of Kepler-373 b

Display orbital revolution of Kepler-373 b around the hoststar Kepler-373
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Exoplanet Name : Kepler-373 b
Alternate Name : "2MASS J19173311+5035493 b, K02218.01, KIC 12058204 b, KOI-2218 b, KOI-2218.01, WISE J191733.11+503549.2 b"
Radius (Rjup / Re): 0.1210 (Rjup) 1.3563 (Rearth)
Mass (Mjup / Me): 0.0093 (Mjup) 2.9437 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0600 (AU) 0.0600 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0152
Orbital Period(Observed/Estimated) 5.54 (Days Obs.) 5.76 (Days Est.)
Surface Gravity (G Earth) 1.6002
Star Radiation at Atmospheric Boundary: 622341.8 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1253.6 (K)
Blackbody T 0.3(K) 1177.2 (K)
Blackbody T 0.7(K) 952.5 (K)
Tidally Locked Blackbody T 0.1(K) 1490.8 (K)
Tidally Locked Blackbody T 0.3(K) 1400.0 (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-373
Alternate Name : "2MASS J19173311+5035493, KIC 12058204, KOI-2218, WISE J191733.11+503549.2"
Star Distance(LY) : 3556.2
Stellar Radius(Rsun) : 1.4 (Rsun Measured)
Stellar Mass(Msun) : 0.9 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5602 (K)
Spectral type : G2
UV portion[%]: 7.8
Visible portion[%]: 44.8
IR portion[%]: 47.4
Metalicity : -0.3
Absolute Magnitude: 3.1
Apparent Magnitude: 13.3
Right Ascension(RA) 289.3880
Declination (DEC) 50.5971
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-373+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-373%20b/
Kepler-373 b
Kepler-373 b

  • Kepler-373 b is an exoplanet orbiting the star Kepler-373, located about 3556.2 light-years (1090.3 pc) away from Solar System. Its discovery was publicly announced on 2014.
  • The host star Kepler-373 has apparent magnitude of 13.3, with absolute magnitude of 3.1.
  • It is 0.9 times more massive and 1.4 times bigger compared with our Sun. The surface temperature is 5602 with its spectral types of G2
  • In this planetary system, the extrasolar planet Kepler-373 b orbits around the star Kepler-373 every 5.5 days with its orbital distance of 0.06 AU ( 8975872.2 km)
  • (Projected orbit of Kepler-373 b around its host star Kepler-373)


  • The Star Kepler-373 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.926 AU ( 138522853.4 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.280 AU ( 191474783.8 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.950 AU ( 291765197.2 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.870 AU ( 429345269.1 km)
  • Radiation at Planetary Boundary of Kepler-373 b : 622341.76 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-373)



  • Kopparapu Recent Venus for Star Kepler-373 distance : 0.970 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-373 distance : 1.228 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-373 distance : 1.186 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-373 distance : 1.301 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-373 distance : 2.179 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-373 distance : 2.299 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-373)



  • Original Kopparapu Recent Venus for Star Kepler-373 distance : 0.968 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-373 distance : 1.263 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-373 distance : 1.281 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-373 distance : 2.217 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-373 distance : 2.306 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-373)



    (Position in Stellar Map of star Kepler-373 and its Exoplanet Kepler-373 b)



    (Zoomed position in Stellar Map of star Kepler-373 and its Exoplanet Kepler-373 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-373*)
    *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