Imaginary Picture of HD 4732 c
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Exoplanet Name : HD 4732 c
Alternate Name : HR 228 c
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 2.3700 (Mjup) 753.5131 (Mearth)
Semi Major Axis / Orbital Distance Calculated 4.6000 (AU) 4.6000 (AU Est.)
Eccentricity : 0.2300
Orbital Period(Yrs) 7.4796
Orbital Period(Observed/Estimated) 2732.00 (Days Obs.) 2731.82 (Days Est.)
Star Radiation at Atmospheric Boundary: 1022.0 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 252.4 (K)
Blackbody T 0.3(K) 237.0 (K)
Blackbody T 0.7(K) 191.7 (K)
Tidally Locked Blackbody T 0.1(K) 300.1 (K)
Tidally Locked Blackbody T 0.3(K) 281.8 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Radial Velocity
Mass Detection : Radial Velocity
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Habitable
Habitability by Kopparapu: Not habitable
Star Name : HD 4732
Alternate Name :
Star Distance(LY) : 188.9
Stellar Radius(Rsun) : 5.4 (Rsun Measured)
Stellar Mass(Msun) : 1.7 (Msun Measured) 1.7 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 4959 (K)
Spectral type : K0 IV
Metalicity : 0.0
Absolute Magnitude: 2.1
Apparent Magnitude: 5.9
Right Ascension(RA) 12.3081
Declination (DEC) -24.1367
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
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/HD%204732%20c/
HD 4732 c
HD 4732 c

  • HD 4732 c is an exoplanet orbiting the star HD 4732, located about 188.9 light-years (57.9 pc) away from Solar System. Its discovery was publicly announced on 2013.
  • The host star HD 4732 has apparent magnitude of 5.9, with absolute magnitude of 2.1.
  • It is 1.7 times more massive and 5.4 times bigger compared with our Sun. The surface temperature is 4959 with its spectral types of K0 IV
  • In this planetary system, the extrasolar planet HD 4732 c orbits around the star HD 4732 every 2732.0 days with its orbital distance of 4.60 AU ( 688150205.2 km)
  • (Projected orbit of HD 4732 c around its host star HD 4732)


  • The Star HD 4732 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 2.877 AU ( 430368115.9 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 3.977 AU ( 594881204.8 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 6.059 AU ( 906467309.2 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 8.917 AU ( 1333906355.3 km)
  • Radiation at Planetary Boundary of HD 4732 c : 1022.01 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 4732)



  • Kopparapu Recent Venus for Star HD 4732 distance : 3.118 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 4732 distance : 3.948 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 4732 distance : 3.813 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 4732 distance : 4.185 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 4732 distance : 7.167 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 4732 distance : 7.560 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 4732)



  • Original Kopparapu Recent Venus for Star HD 4732 distance : 3.084 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 4732 distance : 4.069 AU
  • Original Kopparapu Moist Greenhouse for Star HD 4732 distance : 4.081 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 4732 distance : 7.287 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 4732 distance : 7.578 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 4732)



    (Position in Stellar Map of star HD 4732 and its Exoplanet HD 4732 c)



    (Zoomed position in Stellar Map of star HD 4732 and its Exoplanet HD 4732 c (zoom level 3))