Imaginary Picture of HD 217107 b
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Exoplanet Name : HD 217107 b
Alternate Name :
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 1.3300 (Mjup) 422.8575 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0730 (AU) 0.0730 (AU Est.)
Eccentricity : 0.1320
Orbital Period(Yrs) 0.0195
Orbital Period(Observed/Estimated) 7.13 (Days Obs.) 7.13 (Days Est.)
Star Radiation at Atmospheric Boundary: 276638.7 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1023.6 (K)
Blackbody T 0.3(K) 961.2 (K)
Blackbody T 0.7(K) 777.8 (K)
Tidally Locked Blackbody T 0.1(K) 1217.2 (K)
Tidally Locked Blackbody T 0.3(K) 1143.1 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Radial Velocity
Mass Detection : Radial Velocity
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : HD 217107
Alternate Name :
Star Distance(LY) : 64.3
Stellar Radius(Rsun) : 1.1 (Rsun Measured)
Stellar Mass(Msun) : 1.0 (Msun Measured) 1.0 (Msun Estimated)
Star Age : 7.3 (GY)
Temperature : 5666 (K)
Spectral type : G8 IV
Metalicity : 0.4
Absolute Magnitude: 4.7
Apparent Magnitude: 6.2
Right Ascension(RA) 344.5648
Declination (DEC) -2.3950
Hubble Space Telescope Guide Star Catalog (GSC) ID 05235-01468
Discovered by
Discovery Paper - Authors "Feng,.atherina; Wright,ason.; Nelson,enjamin; Wang,haron.; Ford,ric.; Marcy,eoffrey.; Isaacson,oward; Howard,ndrew."
Discovery Paper - Title The California Planet Survey IV: A Planet Orbiting the Giant Star HD 145934 and Updates to Seven Systems with Long-period Planets
Discovery Paper - Journal
Discovery Paper - URL
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+217107+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/HD%20217107%20b/
HD 217107 b
HD 217107 b

  • HD 217107 b is an exoplanet orbiting the star HD 217107, located about 64.3 light-years (19.7 pc) away from Solar System. Its discovery was publicly announced on 1998.
  • The host star HD 217107 has apparent magnitude of 6.2, with absolute magnitude of 4.7.
  • It is 1.0 times more massive and 1.1 times bigger compared with our Sun. The surface temperature is 5666 with its spectral types of G8 IV
  • In this planetary system, the extrasolar planet HD 217107 b orbits around the star HD 217107 every 7.1 days with its orbital distance of 0.07 AU ( 10920644.6 km)
  • (Projected orbit of HD 217107 b around its host star HD 217107)


  • The Star HD 217107 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.751 AU ( 112366022.6 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.038 AU ( 155319207.9 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.582 AU ( 236672100.8 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.328 AU ( 348273364.3 km)
  • Radiation at Planetary Boundary of HD 217107 b : 276638.67 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 217107)



  • Kopparapu Recent Venus for Star HD 217107 distance : 0.784 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 217107 distance : 0.992 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 217107 distance : 0.959 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 217107 distance : 1.051 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 217107 distance : 1.758 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 217107 distance : 1.854 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 217107)



  • Original Kopparapu Recent Venus for Star HD 217107 distance : 0.783 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 217107 distance : 1.020 AU
  • Original Kopparapu Moist Greenhouse for Star HD 217107 distance : 1.036 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 217107 distance : 1.789 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 217107 distance : 1.860 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 217107)



    (Position in Stellar Map of star HD 217107 and its Exoplanet HD 217107 b)



    (Zoomed position in Stellar Map of star HD 217107 and its Exoplanet HD 217107 b (zoom level 3))