Imaginary Picture of HD 104985 b
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Exoplanet Name : HD 104985 b
Alternate Name :
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 8.3000 (Mjup) 2638.8854 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.9500 (AU) 0.9500 (AU Est.)
Eccentricity : 0.0900
Orbital Period(Yrs) 0.5462
Orbital Period(Observed/Estimated) 199.50 (Days Obs.) 267.37 (Days Est.)
Star Radiation at Atmospheric Boundary: 84237.9 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 760.4 (K)
Blackbody T 0.3(K) 714.1 (K)
Blackbody T 0.7(K) 577.7 (K)
Tidally Locked Blackbody T 0.1(K) 904.2 (K)
Tidally Locked Blackbody T 0.3(K) 849.2 (K)
Size Class: Jupiter-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 104985
Alternate Name :
Star Distance(LY) : 316.7
Stellar Radius(Rsun) : 10.9 (Rsun Measured)
Stellar Mass(Msun) : 1.6 (Msun Measured) 2.9 (Msun Estimated)
Star Age : 3.0 (GY)
Temperature : 4786 (K)
Spectral type : G9 III
Metalicity : -0.3
Absolute Magnitude: 0.9
Apparent Magnitude: 5.8
Right Ascension(RA) 181.3130
Declination (DEC) 76.9056
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by Bunei Sato et al.
Discovery Paper - Authors "Sato,un'ei; Izumiura,ideyuki; Toyota,ri; Kambe,iji; Ikoma,asahiro; Omiya,asashi; Masuda,eiji; Takeda,oichi; Murata,aisuke; Itoh,oichi; Ando,iroyasu; Yoshida,ichitoshi; Kokubo,iichiro; Ida,higeru;"
Discovery Paper - Title "Planetary Companions around Three Intermediate-Mass G and K Giants: 18 Delphini, Aquilae, and HD 81688"
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+104985++&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/HD%20104985%20b/
HD 104985 b
HD 104985 b

  • HD 104985 b is an exoplanet orbiting the star HD 104985, located about 316.7 light-years (97.1 pc) away from Solar System. Its discovery was publicly announced on 2003.
  • The host star HD 104985 has apparent magnitude of 5.8, with absolute magnitude of 0.9.
  • It is 1.6 times more massive and 10.9 times bigger compared with our Sun. The surface temperature is 4786 with its spectral types of G9 III
  • In this planetary system, the extrasolar planet HD 104985 b orbits around the star HD 104985 every 199.5 days with its orbital distance of 0.95 AU ( 142117977.2 km)
  • (Projected orbit of HD 104985 b around its host star HD 104985)


  • The Star HD 104985 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 5.394 AU ( 806924766.3 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 7.456 AU ( 1115380901.6 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 11.361 AU ( 1699593660.8 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 16.718 AU ( 2501026526.3 km)
  • Radiation at Planetary Boundary of HD 104985 b : 84237.89 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 104985)



  • Kopparapu Recent Venus for Star HD 104985 distance : 5.892 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 104985 distance : 7.459 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 104985 distance : 7.205 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 104985 distance : 7.909 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 104985 distance : 13.640 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 104985 distance : 14.388 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 104985)



  • Original Kopparapu Recent Venus for Star HD 104985 distance : 5.820 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 104985 distance : 7.693 AU
  • Original Kopparapu Moist Greenhouse for Star HD 104985 distance : 7.700 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 104985 distance : 13.866 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 104985 distance : 14.420 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 104985)



    (Position in Stellar Map of star HD 104985 and its Exoplanet HD 104985 b)



    (Zoomed position in Stellar Map of star HD 104985 and its Exoplanet HD 104985 b (zoom level 3))