Imaginary Picture of HD 40307 e
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Exoplanet Name : HD 40307 e
Alternate Name :
Radius (Rjup / Re): 0.1244 (Rjup) 1.3945 (Rearth)
Mass (Mjup / Me): 0.0110 (Mjup) 3.4973 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.1886 (AU) 0.1886 (AU Est.)
Eccentricity : 0.1500
Orbital Period(Yrs) 0.0948
Orbital Period(Observed/Estimated) 34.62 (Days Obs.) 34.09 (Days Est.)
Star Radiation at Atmospheric Boundary: 9190.8 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 437.0 (K)
Blackbody T 0.3(K) 410.4 (K)
Blackbody T 0.7(K) 332.0 (K)
Tidally Locked Blackbody T 0.1(K) 519.7 (K)
Tidally Locked Blackbody T 0.3(K) 488.0 (K)
Size Class: super-Earth-size
Mass Class:
Detection Type : Radial Velocity
Mass Detection :
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : HD 40307
Alternate Name :
Star Distance(LY) : 41.7
Stellar Radius(Rsun) : 0.7 (Rsun Estimated)
Stellar Mass(Msun) : 0.8 (Msun Measured) 0.7 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 4977 (K)
Spectral type : K2.5V
Metalicity : -0.3
Absolute Magnitude: 6.6
Apparent Magnitude: 7.2
Right Ascension(RA) 88.5177
Declination (DEC) -60.0233
Hubble Space Telescope Guide Star Catalog (GSC) ID 08892-01247
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=HD+40307+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/HD%2040307%20e/
HD 40307 e
HD 40307 e

  • HD 40307 e is an exoplanet orbiting the star HD 40307, located about 41.7 light-years (12.8 pc) away from Solar System. Its discovery was publicly announced on 2012.
  • The host star HD 40307 has apparent magnitude of 7.2, with absolute magnitude of 6.6.
  • It is 0.8 times more massive and 0.7 times bigger compared with our Sun. The surface temperature is 4977 with its spectral types of K2.5V
  • In this planetary system, the extrasolar planet HD 40307 e orbits around the star HD 40307 every 34.6 days with its orbital distance of 0.19 AU ( 28214158.4 km)
  • (Projected orbit of HD 40307 e around its host star HD 40307)


  • The Star HD 40307 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.354 AU ( 52914477.4 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.489 AU ( 73141636.0 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.745 AU ( 111451667.0 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.096 AU ( 164006010.4 km)
  • Radiation at Planetary Boundary of HD 40307 e : 9190.82 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 40307)



  • Kopparapu Recent Venus for Star HD 40307 distance : 0.383 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 40307 distance : 0.485 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 40307 distance : 0.468 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 40307 distance : 0.514 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 40307 distance : 0.880 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 40307 distance : 0.928 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 40307)



  • Original Kopparapu Recent Venus for Star HD 40307 distance : 0.379 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 40307 distance : 0.500 AU
  • Original Kopparapu Moist Greenhouse for Star HD 40307 distance : 0.501 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 40307 distance : 0.895 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 40307 distance : 0.930 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 40307)



    (Position in Stellar Map of star HD 40307 and its Exoplanet HD 40307 e)



    (Zoomed position in Stellar Map of star HD 40307 and its Exoplanet HD 40307 e (zoom level 3))