Imaginary Picture of HD 105779 b

Display orbital revolution of HD 105779 b around the hoststar HD 105779
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Exoplanet Name : HD 105779 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 0.6400 (Mjup) 203.4803 (Mearth)
Semi Major Axis / Orbital Distance Calculated 3.3800 (AU) 3.3800 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 6.6035
Orbital Period(Observed/Estimated) 2412.00 (Days Obs.) 2405.86 (Days Est.)
Surface Gravity (G Earth) 1.9651
Star Radiation at Atmospheric Boundary: 106.7 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 143.5 (K)
Blackbody T 0.3(K) 134.7 (K)
Blackbody T 0.7(K) 109.0 (K)
Tidally Locked Blackbody T 0.1(K) 170.6 (K)
Tidally Locked Blackbody T 0.3(K) 160.2 (K)
Size Class: Jupiter-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 105779
Alternate Name :
Star Distance(LY) : 179.7
Stellar Radius(Rsun) : 0.9 (Rsun Measured)
Stellar Mass(Msun) : 0.9 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5792 (K)
Spectral type : G2
UV portion[%]: 0.3
Visible portion[%]: 1.5
IR portion[%]: 98.2
Metalicity : -0.2
Absolute Magnitude: 4.9
Apparent Magnitude: 8.6
Right Ascension(RA) 182.6612
Declination (DEC) -17.6014
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal
Discovery Paper - URL
SIMBAD LINK https://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+105779&submit=SIMBAD+search
Open Exoplanet Database Link
HD 105779 b
HD 105779 b

  • HD 105779 b is an exoplanet orbiting the star HD 105779, located about 179.7 light-years (55.1 pc) away from Solar System. Its discovery was publicly announced on 2021.
  • The host star HD 105779 has apparent magnitude of 8.6, with absolute magnitude of 4.9.
  • It is 0.9 times more massive and 0.9 times bigger compared with our Sun. The surface temperature is 5792 with its spectral types of G2
  • In this planetary system, the extrasolar planet HD 105779 b orbits around the star HD 105779 every 2412.0 days with its orbital distance of 3.38 AU ( 505640803.0 km)
  • (Projected orbit of HD 105779 b around its host star HD 105779)


  • The Star HD 105779 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.683 AU ( 102198159.0 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.944 AU ( 141264563.3 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.439 AU ( 215255932.7 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.117 AU ( 316758534.7 km)
  • Radiation at Planetary Boundary of HD 105779 b : 106.74 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 105779)



  • Kopparapu Recent Venus for Star HD 105779 distance : 0.707 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 105779 distance : 0.896 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 105779 distance : 0.865 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 105779 distance : 0.949 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 105779 distance : 1.581 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 105779 distance : 1.668 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 105779)



  • Original Kopparapu Recent Venus for Star HD 105779 distance : 0.709 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 105779 distance : 0.921 AU
  • Original Kopparapu Moist Greenhouse for Star HD 105779 distance : 0.938 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 105779 distance : 1.609 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 105779 distance : 1.674 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 105779)



    (Position in Stellar Map of star HD 105779 and its Exoplanet HD 105779 b)



    (Zoomed position in Stellar Map of star HD 105779 and its Exoplanet HD 105779 b (zoom level 3))

    (Synthetic Spectrum of star HD 105779*)
    *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