Imaginary Picture of Kepler-381 c

Display orbital revolution of Kepler-381 c around the hoststar Kepler-381
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Exoplanet Name : Kepler-381 c
Alternate Name : "2MASS J19004386+4349519 c, K02352.01, KIC 8013439 c, KOI-2352 c, KOI-2352.01, WISE J190043.88+434951.8 c"
Status : Confirmed
Radius (Rjup / Re): 0.1000 (Rjup) 1.1209 (Rearth)
Mass (Mjup / Me): 0.0046 (Mjup) 1.4743 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.1170 (AU) 0.1170 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0367
Orbital Period(Observed/Estimated) 13.39 (Days Obs.) 12.63 (Days Est.)
Surface Gravity (G Earth) 1.1735
Star Radiation at Atmospheric Boundary: 309274.4 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1052.5 (K)
Blackbody T 0.3(K) 988.4 (K)
Blackbody T 0.7(K) 799.7 (K)
Tidally Locked Blackbody T 0.1(K) 1251.7 (K)
Tidally Locked Blackbody T 0.3(K) 1175.4 (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-381
Alternate Name : "2MASS J19004386+4349519, KIC 8013439, KOI-2352, WISE J190043.88+434951.8"
Star Distance(LY) : 867.4
Stellar Radius(Rsun) : 1.5 (Rsun Measured)
Stellar Mass(Msun) : 1.3 (Msun Measured) 1.2 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 6346 (K)
Spectral type : G0
UV portion[%]: 7.8
Visible portion[%]: 44.8
IR portion[%]: 47.4
Metalicity : 0.0
Absolute Magnitude: 2.6
Apparent Magnitude: 9.7
Right Ascension(RA) 285.1828
Declination (DEC) 43.8311
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-381+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-381%20c/
Kepler-381 c
Kepler-381 c

  • Kepler-381 c is an exoplanet orbiting the star Kepler-381, located about 867.4 light-years (266.0 pc) away from Solar System. Its discovery was publicly announced on 2014.
  • The host star Kepler-381 has apparent magnitude of 9.7, with absolute magnitude of 2.6.
  • It is 1.3 times more massive and 1.5 times bigger compared with our Sun. The surface temperature is 6346 with its spectral types of G0
  • In this planetary system, the extrasolar planet Kepler-381 c orbits around the star Kepler-381 every 13.4 days with its orbital distance of 0.12 AU ( 17502950.9 km)
  • (Projected orbit of Kepler-381 c around its host star Kepler-381)


  • The Star Kepler-381 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.273 AU ( 190420429.3 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.759 AU ( 263210796.1 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.681 AU ( 401075004.8 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 3.945 AU ( 590199439.5 km)
  • Radiation at Planetary Boundary of Kepler-381 c : 309274.38 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-381)



  • Kopparapu Recent Venus for Star Kepler-381 distance : 1.275 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-381 distance : 1.614 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-381 distance : 1.559 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-381 distance : 1.708 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-381 distance : 2.815 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-381 distance : 2.969 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-381)



  • Original Kopparapu Recent Venus for Star Kepler-381 distance : 1.292 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-381 distance : 1.656 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-381 distance : 1.709 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-381 distance : 2.866 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-381 distance : 2.980 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-381)



    (Position in Stellar Map of star Kepler-381 and its Exoplanet Kepler-381 c)



    (Zoomed position in Stellar Map of star Kepler-381 and its Exoplanet Kepler-381 c (zoom level 3))

    (Synthetic Spectrum of star Kepler-381*)
    *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