Imaginary Picture of HD 204313 c

Display orbital revolution of HD 204313 c around the hoststar HD 204313
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Exoplanet Name : HD 204313 c
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.2238 (Rjup) 2.5086 (Rearth)
Mass (Mjup / Me): 0.0553 (Mjup) 17.5820 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.2099 (AU) 0.2099 (AU Est.)
Eccentricity : 0.1550
Orbital Period(Yrs) 0.0956
Orbital Period(Observed/Estimated) 34.91 (Days Obs.) 34.36 (Days Est.)
Surface Gravity (G Earth) 2.7938
Star Radiation at Atmospheric Boundary: 32688.2 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 600.1 (K)
Blackbody T 0.3(K) 563.6 (K)
Blackbody T 0.7(K) 456.0 (K)
Tidally Locked Blackbody T 0.1(K) 713.7 (K)
Tidally Locked Blackbody T 0.3(K) 670.2 (K)
Size Class: sub-Neptune-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 204313
Alternate Name :
Star Distance(LY) : 154.5
Stellar Radius(Rsun) : 1.0 (Rsun Estimated)
Stellar Mass(Msun) : 1.0 (Msun Measured) 1.0 (Msun Estimated)
Star Age : 3.4 (GY)
Temperature : 5767 (K)
Spectral type : G5V
UV portion[%]: 7.8
Visible portion[%]: 44.7
IR portion[%]: 47.5
Metalicity : 0.2
Absolute Magnitude: 4.6
Apparent Magnitude: 8.0
Right Ascension(RA) 322.0509
Declination (DEC) -21.7264
Hubble Space Telescope Guide Star Catalog (GSC) ID 06373-00682
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+204313+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/HD%20204313%20c/
HD 204313 c
HD 204313 c

  • HD 204313 c is an exoplanet orbiting the star HD 204313, located about 154.5 light-years (47.4 pc) away from Solar System. Its discovery was publicly announced on 2011.
  • The host star HD 204313 has apparent magnitude of 8.0, with absolute magnitude of 4.6.
  • It is 1.0 times more massive and 1.0 times bigger compared with our Sun. The surface temperature is 5767 with its spectral types of G5V
  • In this planetary system, the extrasolar planet HD 204313 c orbits around the star HD 204313 every 34.9 days with its orbital distance of 0.21 AU ( 31400593.1 km)
  • (Projected orbit of HD 204313 c around its host star HD 204313)


  • The Star HD 204313 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.742 AU ( 111061503.3 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.026 AU ( 153516021.5 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.564 AU ( 233924443.7 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.301 AU ( 344230066.5 km)
  • Radiation at Planetary Boundary of HD 204313 c : 32688.18 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 204313)



  • Kopparapu Recent Venus for Star HD 204313 distance : 0.770 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 204313 distance : 0.975 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 204313 distance : 0.942 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 204313 distance : 1.032 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 204313 distance : 1.722 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 204313 distance : 1.817 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 204313)



  • Original Kopparapu Recent Venus for Star HD 204313 distance : 0.771 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 204313 distance : 1.002 AU
  • Original Kopparapu Moist Greenhouse for Star HD 204313 distance : 1.020 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 204313 distance : 1.753 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 204313 distance : 1.823 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 204313)



    (Position in Stellar Map of star HD 204313 and its Exoplanet HD 204313 c)



    (Zoomed position in Stellar Map of star HD 204313 and its Exoplanet HD 204313 c (zoom level 3))

    (Synthetic Spectrum of star HD 204313*)
    *Yamashiki YA et al. 2019 ApJ 881 114
    MUSCLES Paper I - France et al. 2016 ApJ 820 89
    MUSCLES Paper II- Youngblood et al. 2016 ApJ 824 101
    MUSCLES Paper III- Loyd et al. 2016 ApJ 824 102