Imaginary Picture of HD 100777 b

Display orbital revolution of HD 100777 b around the hoststar HD 100777
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Exoplanet Name : HD 100777 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 1.1600 (Mjup) 368.8081 (Mearth)
Semi Major Axis / Orbital Distance Calculated 1.0300 (AU) 1.0300 (AU Est.)
Eccentricity : 0.3600
Orbital Period(Yrs) 1.0505
Orbital Period(Observed/Estimated) 383.70 (Days Obs.) 381.81 (Days Est.)
Surface Gravity (G Earth) 3.5617
Star Radiation at Atmospheric Boundary: 1122.3 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 258.3 (K)
Blackbody T 0.3(K) 242.6 (K)
Blackbody T 0.7(K) 196.3 (K)
Tidally Locked Blackbody T 0.1(K) 307.2 (K)
Tidally Locked Blackbody T 0.3(K) 288.5 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Radial Velocity
Mass Detection :
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Habitable
Habitability by Kopparapu: Not habitable
Star Name : HD 100777
Alternate Name :
Star Distance(LY) : 161.0
Stellar Radius(Rsun) : 1.0 (Rsun Estimated)
Stellar Mass(Msun) : 1.0 (Msun Measured) 1.0 (Msun Estimated)
Star Age : 2.0 (GY)
Temperature : 5582 (K)
Spectral type : K0
UV portion[%]: 7.2
Visible portion[%]: 43.8
IR portion[%]: 49.0
Metalicity : 0.3
Absolute Magnitude: 5.0
Apparent Magnitude: 8.4
Right Ascension(RA) 173.9647
Declination (DEC) -4.7558
Hubble Space Telescope Guide Star Catalog (GSC) ID 04933-00678
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+100777+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/HD%20100777%20b/
HD 100777 b
HD 100777 b

  • HD 100777 b is an exoplanet orbiting the star HD 100777, located about 161.0 light-years (49.4 pc) away from Solar System. Its discovery was publicly announced on 2007.
  • The host star HD 100777 has apparent magnitude of 8.4, with absolute magnitude of 5.0.
  • It is 1.0 times more massive and 1.0 times bigger compared with our Sun. The surface temperature is 5582 with its spectral types of K0
  • In this planetary system, the extrasolar planet HD 100777 b orbits around the star HD 100777 every 383.7 days with its orbital distance of 1.03 AU ( 154085806.8 km)
  • (Projected orbit of HD 100777 b around its host star HD 100777)


  • The Star HD 100777 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.675 AU ( 100980560.5 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.933 AU ( 139581523.9 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.422 AU ( 212691353.1 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.092 AU ( 312984643.6 km)
  • Radiation at Planetary Boundary of HD 100777 b : 1122.25 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 100777)



  • Kopparapu Recent Venus for Star HD 100777 distance : 0.708 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 100777 distance : 0.896 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 100777 distance : 0.866 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 100777 distance : 0.949 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 100777 distance : 1.592 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 100777 distance : 1.679 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 100777)



  • Original Kopparapu Recent Venus for Star HD 100777 distance : 0.706 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 100777 distance : 0.922 AU
  • Original Kopparapu Moist Greenhouse for Star HD 100777 distance : 0.934 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 100777 distance : 1.619 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 100777 distance : 1.684 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 100777)



    (Position in Stellar Map of star HD 100777 and its Exoplanet HD 100777 b)



    (Zoomed position in Stellar Map of star HD 100777 and its Exoplanet HD 100777 b (zoom level 3))

    (Synthetic Spectrum of star HD 100777*)
    *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