Imaginary Picture of HD 159868 b
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Exoplanet Name : HD 159868 b
Alternate Name :
Radius (Rjup / Re): 1.2020 (Rjup) 13.4732 (Rearth)
Mass (Mjup / Me): 2.2180 (Mjup) 705.1865 (Mearth)
Semi Major Axis / Orbital Distance Calculated 2.3200 (AU) 2.3200 (AU Est.)
Eccentricity : 0.0240
Orbital Period(Yrs) 3.2418
Orbital Period(Observed/Estimated) 1184.10 (Days Obs.) 1183.17 (Days Est.)
Star Radiation at Atmospheric Boundary: 969.5 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 249.0 (K)
Blackbody T 0.3(K) 233.9 (K)
Blackbody T 0.7(K) 189.2 (K)
Tidally Locked Blackbody T 0.1(K) 296.2 (K)
Tidally Locked Blackbody T 0.3(K) 278.1 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Radial Velocity
Mass Detection : Radial Velocity
Radius Detection : Theoretical
Habitability by Solar Eq. Astronomical Unit: Habitable
Habitability by Kopparapu: Not habitable
Star Name : HD 159868
Alternate Name :
Star Distance(LY) : 180.6
Stellar Radius(Rsun) : 2.1 (Rsun Measured)
Stellar Mass(Msun) : 1.2 (Msun Measured) 1.2 (Msun Estimated)
Star Age : 8.1 (GY)
Temperature : 5534 (K)
Spectral type : G5V
Metalicity : 0.0
Absolute Magnitude: 3.5
Apparent Magnitude: 7.2
Right Ascension(RA) 264.7480
Declination (DEC) -43.1455
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=HD+159868+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/HD%20159868%20b/
HD 159868 b
HD 159868 b

  • HD 159868 b is an exoplanet orbiting the star HD 159868, located about 180.6 light-years (55.4 pc) away from Solar System. Its discovery was publicly announced on 2007.
  • The host star HD 159868 has apparent magnitude of 7.2, with absolute magnitude of 3.5.
  • It is 1.2 times more massive and 2.1 times bigger compared with our Sun. The surface temperature is 5534 with its spectral types of G5V
  • In this planetary system, the extrasolar planet HD 159868 b orbits around the star HD 159868 every 1184.1 days with its orbital distance of 2.32 AU ( 347067060.0 km)
  • (Projected orbit of HD 159868 b around its host star HD 159868)


  • The Star HD 159868 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.413 AU ( 211405375.2 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.953 AU ( 292217475.4 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.976 AU ( 445274764.9 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 4.380 AU ( 655241322.7 km)
  • Radiation at Planetary Boundary of HD 159868 b : 969.49 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 159868)



  • Kopparapu Recent Venus for Star HD 159868 distance : 1.486 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 159868 distance : 1.882 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 159868 distance : 1.817 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 159868 distance : 1.993 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 159868 distance : 3.346 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 159868 distance : 3.529 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 159868)



  • Original Kopparapu Recent Venus for Star HD 159868 distance : 1.481 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 159868 distance : 1.935 AU
  • Original Kopparapu Moist Greenhouse for Star HD 159868 distance : 1.960 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 159868 distance : 3.404 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 159868 distance : 3.540 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 159868)



    (Position in Stellar Map of star HD 159868 and its Exoplanet HD 159868 b)



    (Zoomed position in Stellar Map of star HD 159868 and its Exoplanet HD 159868 b (zoom level 3))