Imaginary Picture of HD 212301 A b
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Exoplanet Name : HD 212301 A b
Alternate Name : HD 212301 b
Radius (Rjup / Re): 1.0700 (Rjup) 11.9936 (Rearth)
Mass (Mjup / Me): 0.4000 (Mjup) 127.1752 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0360 (AU) 0.0360 (AU Est.)
Eccentricity : 0.0147
Orbital Period(Yrs) 0.0061
Orbital Period(Observed/Estimated) 2.25 (Days Obs.) 2.43 (Days Est.)
Star Radiation at Atmospheric Boundary: 1308818.2 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1509.6 (K)
Blackbody T 0.3(K) 1417.7 (K)
Blackbody T 0.7(K) 1147.0 (K)
Tidally Locked Blackbody T 0.1(K) 1795.2 (K)
Tidally Locked Blackbody T 0.3(K) 1685.9 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Radial Velocity
Mass Detection :
Radius Detection : Theoretical
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : HD 212301 A
Alternate Name : HD 212301
Star Distance(LY) : 179.2
Stellar Radius(Rsun) : 1.0 (Rsun Estimated)
Stellar Mass(Msun) : 1.1 (Msun Measured) 1.2 (Msun Estimated)
Star Age : 5.9 (GY)
Temperature : 5998 (K)
Spectral type : F8 V
Metalicity : 0.2
Absolute Magnitude: 4.1
Apparent Magnitude: 7.8
Right Ascension(RA) 336.8788
Declination (DEC) -77.7178
Hubble Space Telescope Guide Star Catalog (GSC) ID 05842-00736
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+212301+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/HD%20212301%20b/
HD 212301 A b
HD 212301 A b

  • HD 212301 A b is an exoplanet orbiting the star HD 212301 A, located about 179.2 light-years (54.9 pc) away from Solar System. Its discovery was publicly announced on 2005.
  • The host star HD 212301 A has apparent magnitude of 7.8, with absolute magnitude of 4.1.
  • It is 1.1 times more massive and 1.0 times bigger compared with our Sun. The surface temperature is 5998 with its spectral types of F8 V
  • In this planetary system, the extrasolar planet HD 212301 A b orbits around the star HD 212301 A every 2.2 days with its orbital distance of 0.04 AU ( 5385523.3 km)
  • (Projected orbit of HD 212301 A b around its host star HD 212301 A)


  • The Star HD 212301 A 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.806 AU ( 120530754.7 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.114 AU ( 166605001.5 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.697 AU ( 253869152.7 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.497 AU ( 373579579.4 km)
  • Radiation at Planetary Boundary of HD 212301 A b : 1308818.23 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 212301 A)



  • Kopparapu Recent Venus for Star HD 212301 A distance : 0.824 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 212301 A distance : 1.044 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 212301 A distance : 1.008 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 212301 A distance : 1.105 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 212301 A distance : 1.833 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 212301 A distance : 1.933 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 212301 A)



  • Original Kopparapu Recent Venus for Star HD 212301 A distance : 0.829 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 212301 A distance : 1.071 AU
  • Original Kopparapu Moist Greenhouse for Star HD 212301 A distance : 1.097 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 212301 A distance : 1.865 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 212301 A distance : 1.940 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 212301 A)



    (Position in Stellar Map of star HD 212301 A and its Exoplanet HD 212301 A b)



    (Zoomed position in Stellar Map of star HD 212301 A and its Exoplanet HD 212301 A b (zoom level 3))