Imaginary Picture of HD 28185 c

Display orbital revolution of HD 28185 c around the hoststar HD 28185
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Exoplanet Name : HD 28185 c
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 19.6390 (Mjup) 6243.9844 (Mearth)
Semi Major Axis / Orbital Distance Calculated 13.1760 (AU) 13.1760 (AU Est.)
Eccentricity : 0.1200
Orbital Period(Yrs) 47.6863
Orbital Period(Observed/Estimated) 17417.90 (Days Obs.) 15687.54 (Days Est.)
Surface Gravity (G Earth) 60.3002
Star Radiation at Atmospheric Boundary: 6.8 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 72.0 (K)
Blackbody T 0.3(K) 67.6 (K)
Blackbody T 0.7(K) 54.7 (K)
Tidally Locked Blackbody T 0.1(K) 85.6 (K)
Tidally Locked Blackbody T 0.3(K) 80.4 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : "Radial Velocity, Microlensing"
Mass Detection : Astrometry
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : HD 28185
Alternate Name :
Star Distance(LY) : 128.5
Stellar Radius(Rsun) : 1.0 (Rsun Measured)
Stellar Mass(Msun) : 1.2 (Msun Measured) 1.0 (Msun Estimated)
Star Age : 5.4 (GY)
Temperature : 5482 (K)
Spectral type : G5
UV portion[%]: 6.8
Visible portion[%]: 43.1
IR portion[%]: 50.1
Metalicity : 0.2
Absolute Magnitude: 4.8
Apparent Magnitude: 7.8
Right Ascension(RA) 66.6083
Declination (DEC) -10.5506
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal
Discovery Paper - URL
SIMBAD LINK
Open Exoplanet Database Link
HD 28185 c
HD 28185 c

  • HD 28185 c is an exoplanet orbiting the star HD 28185, located about 128.5 light-years (39.4 pc) away from Solar System. Its discovery was publicly announced on 2022.
  • The host star HD 28185 has apparent magnitude of 7.8, with absolute magnitude of 4.8.
  • It is 1.2 times more massive and 1.0 times bigger compared with our Sun. The surface temperature is 5482 with its spectral types of G5
  • In this planetary system, the extrasolar planet HD 28185 c orbits around the star HD 28185 every 17417.9 days with its orbital distance of 13.18 AU ( 1971101544.3 km)
  • (Projected orbit of HD 28185 c around its host star HD 28185)


  • The Star HD 28185 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.671 AU ( 100316737.5 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.927 AU ( 138663947.1 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.412 AU ( 211293169.1 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.078 AU ( 310927154.5 km)
  • Radiation at Planetary Boundary of HD 28185 c : 6.77 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 28185)



  • Kopparapu Recent Venus for Star HD 28185 distance : 0.707 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 28185 distance : 0.896 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 28185 distance : 0.865 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 28185 distance : 0.949 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 28185 distance : 1.595 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 28185 distance : 1.683 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 28185)



  • Original Kopparapu Recent Venus for Star HD 28185 distance : 0.704 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 28185 distance : 0.921 AU
  • Original Kopparapu Moist Greenhouse for Star HD 28185 distance : 0.932 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 28185 distance : 1.623 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 28185 distance : 1.688 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 28185)



    (Position in Stellar Map of star HD 28185 and its Exoplanet HD 28185 c)



    (Zoomed position in Stellar Map of star HD 28185 and its Exoplanet HD 28185 c (zoom level 3))

    (Synthetic Spectrum of star HD 28185*)
    *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