Imaginary Picture of Kepler-445 d
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Exoplanet Name : Kepler-445 d
Alternate Name :
Radius (Rjup / Re): 0.1120 (Rjup) 1.2554 (Rearth)
Mass (Mjup / Me): 0.0110 (Mjup) 3.4973 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.0448 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0223
Orbital Period(Observed/Estimated) 8.15 (Days Obs.) 0.00 (Days Est.)
Star Radiation at Atmospheric Boundary: 5655.9 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 387.1 (K)
Blackbody T 0.3(K) 363.5 (K)
Blackbody T 0.7(K) 294.1 (K)
Tidally Locked Blackbody T 0.1(K) 460.3 (K)
Tidally Locked Blackbody T 0.3(K) 432.3 (K)
Size Class: super-Earth-size
Mass Class:
Detection Type : Primary Transit
Mass Detection : Theoretical
Radius Detection : Primary Transit
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : Kepler-445
Alternate Name :
Star Distance(LY) : 414.9
Stellar Radius(Rsun) : 0.3 (Rsun Measured)
Stellar Mass(Msun) : 0.2 (Msun Measured) 0.2 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 3157 (K)
Spectral type : M6
Metalicity : 0.2
Absolute Magnitude: 12.5
Apparent Magnitude: 18.0
Right Ascension(RA) 298.7375
Declination (DEC) 46.4986
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors "Philip S. Muirhead, Andrew W. Mann, Andrew Vanderburg, Timothy D. Morton, Adam Kraus, Michael Ireland, Jonathan J. Swift, Gregory A. Feiden, Eric Gaidos, J. Zachary Gazak"
Discovery Paper - Title "Kepler-445, Kepler-446 and the Occurrence of Compact Multiples Orbiting Mid-M Dwarf Stars"
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Kepler-445+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-445%20d/
Kepler-445 d
Kepler-445 d

  • Kepler-445 d is an exoplanet orbiting the star Kepler-445, located about 414.9 light-years (127.2 pc) away from Solar System. Its discovery was publicly announced on 2015.
  • The host star Kepler-445 has apparent magnitude of 18.0, with absolute magnitude of 12.5.
  • It is 0.2 times more massive and 0.3 times bigger compared with our Sun. The surface temperature is 3157 with its spectral types of M6
  • In this planetary system, the extrasolar planet Kepler-445 d orbits around the star Kepler-445 every 8.2 days with its orbital distance of 0.04 AU ( 6696155.2 km)
  • (Projected orbit of Kepler-445 d around its host star Kepler-445)


  • The Star Kepler-445 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.066 AU ( 9851607.8 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.091 AU ( 13617496.6 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.139 AU ( 20750051.2 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.204 AU ( 30534609.4 km)
  • Radiation at Planetary Boundary of Kepler-445 d : 5655.91 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-445)



  • Kopparapu Recent Venus for Star Kepler-445 distance : 0.075 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-445 distance : 0.094 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-445 distance : 0.091 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-445 distance : 0.100 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-445 distance : 0.187 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-445 distance : 0.197 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-445)



  • Original Kopparapu Recent Venus for Star Kepler-445 distance : 0.074 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-445 distance : 0.098 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-445 distance : 0.098 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-445 distance : 0.190 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-445 distance : 0.198 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-445)



    (Position in Stellar Map of star Kepler-445 and its Exoplanet Kepler-445 d)



    (Zoomed position in Stellar Map of star Kepler-445 and its Exoplanet Kepler-445 d (zoom level 3))