Imaginary Picture of HD 120084 b

Display orbital revolution of HD 120084 b around the hoststar HD 120084
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Exoplanet Name : HD 120084 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 4.5000 (Mjup) 1430.7210 (Mearth)
Semi Major Axis / Orbital Distance Calculated 4.3000 (AU) 4.3000 (AU Est.)
Eccentricity : 0.6600
Orbital Period(Yrs) 5.7000
Orbital Period(Observed/Estimated) 2082.00 (Days Obs.) 2106.66 (Days Est.)
Surface Gravity (G Earth) 13.8169
Star Radiation at Atmospheric Boundary: 3159.4 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 334.6 (K)
Blackbody T 0.3(K) 314.2 (K)
Blackbody T 0.7(K) 254.3 (K)
Tidally Locked Blackbody T 0.1(K) 397.9 (K)
Tidally Locked Blackbody T 0.3(K) 373.7 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Radial Velocity
Mass Detection :
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : HD 120084
Alternate Name :
Star Distance(LY) : 328.5
Stellar Radius(Rsun) : 9.1 (Rsun Measured)
Stellar Mass(Msun) : 2.4 (Msun Measured) 2.4 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 4892 (K)
Spectral type : G7 III
UV portion[%]: 2.7
Visible portion[%]: 36.1
IR portion[%]: 61.2
Metalicity : 0.1
Absolute Magnitude: 0.9
Apparent Magnitude: 5.9
Right Ascension(RA) 205.6633
Declination (DEC) 78.0617
Hubble Space Telescope Guide Star Catalog (GSC) ID 04561-02319
Discovered by
Discovery Paper - Authors "Bun'ei Sato, Masashi Omiya, Hiroki Harakawa, Yu-Juan Liu, Hideyuki Izumiura, Eiji Kambe, Yoichi Takeda, Michitoshi Yoshida, Yoichi Itoh, Hiroyasu Ando, Eiichiro Kokubo, Shigeru Ida"
Discovery Paper - Title "Planetary Companions to Three Evolved Intermediate-Mass Stars: HD 2952, HD 120084, and omega Serpentis"
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+120084+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/HD%20120084%20b/
HD 120084 b
HD 120084 b

  • HD 120084 b is an exoplanet orbiting the star HD 120084, located about 328.5 light-years (100.7 pc) away from Solar System. Its discovery was publicly announced on 2013.
  • The host star HD 120084 has apparent magnitude of 5.9, with absolute magnitude of 0.9.
  • It is 2.4 times more massive and 9.1 times bigger compared with our Sun. The surface temperature is 4892 with its spectral types of G7 III
  • In this planetary system, the extrasolar planet HD 120084 b orbits around the star HD 120084 every 2082.0 days with its orbital distance of 4.30 AU ( 643270844.0 km)
  • (Projected orbit of HD 120084 b around its host star HD 120084)


  • The Star HD 120084 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 4.728 AU ( 707336139.1 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 6.536 AU ( 977723393.2 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 9.959 AU ( 1489834081.5 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 14.655 AU ( 2192356116.4 km)
  • Radiation at Planetary Boundary of HD 120084 b : 3159.39 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 120084)



  • Kopparapu Recent Venus for Star HD 120084 distance : 5.141 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 120084 distance : 6.508 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 120084 distance : 6.286 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 120084 distance : 6.900 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 120084 distance : 11.848 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 120084 distance : 12.498 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 120084)



  • Original Kopparapu Recent Venus for Star HD 120084 distance : 5.082 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 120084 distance : 6.710 AU
  • Original Kopparapu Moist Greenhouse for Star HD 120084 distance : 6.724 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 120084 distance : 12.046 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 120084 distance : 12.527 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 120084)



    (Position in Stellar Map of star HD 120084 and its Exoplanet HD 120084 b)



    (Zoomed position in Stellar Map of star HD 120084 and its Exoplanet HD 120084 b (zoom level 3))

    (Synthetic Spectrum of star HD 120084*)
    *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