Imaginary Picture of HD 165131 b

Display orbital revolution of HD 165131 b around the hoststar HD 165131
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Exoplanet Name : HD 165131 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 19.0000 (Mjup) 6040.8220 (Mearth)
Semi Major Axis / Orbital Distance Calculated 3.5900 (AU) 3.5900 (AU Est.)
Eccentricity : 0.6700
Orbital Period(Yrs) 6.4146
Orbital Period(Observed/Estimated) 2343.00 (Days Obs.) 2413.12 (Days Est.)
Surface Gravity (G Earth) 58.3382
Star Radiation at Atmospheric Boundary: 126.9 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 149.8 (K)
Blackbody T 0.3(K) 140.7 (K)
Blackbody T 0.7(K) 113.8 (K)
Tidally Locked Blackbody T 0.1(K) 178.2 (K)
Tidally Locked Blackbody T 0.3(K) 167.3 (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 165131
Alternate Name :
Star Distance(LY) : 187.3
Stellar Radius(Rsun) : 1.1 (Rsun Measured)
Stellar Mass(Msun) : 1.1 (Msun Measured) 1.1 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5870 (K)
Spectral type : G1
UV portion[%]: 0.3
Visible portion[%]: 1.5
IR portion[%]: 98.2
Metalicity : 0.1
Absolute Magnitude: 4.6
Apparent Magnitude: 8.4
Right Ascension(RA) 271.3458
Declination (DEC) -21.6736
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 165131 b
HD 165131 b

  • HD 165131 b is an exoplanet orbiting the star HD 165131, located about 187.3 light-years (57.4 pc) away from Solar System. Its discovery was publicly announced on 2023.
  • The host star HD 165131 has apparent magnitude of 8.4, with absolute magnitude of 4.6.
  • It is 1.1 times more massive and 1.1 times bigger compared with our Sun. The surface temperature is 5870 with its spectral types of G1
  • In this planetary system, the extrasolar planet HD 165131 b orbits around the star HD 165131 every 2343.0 days with its orbital distance of 3.59 AU ( 537056355.8 km)
  • (Projected orbit of HD 165131 b around its host star HD 165131)


  • The Star HD 165131 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.791 AU ( 118369600.1 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.094 AU ( 163617720.9 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.667 AU ( 249317198.2 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.452 AU ( 366881179.0 km)
  • Radiation at Planetary Boundary of HD 165131 b : 126.93 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 165131)



  • Kopparapu Recent Venus for Star HD 165131 distance : 0.816 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 165131 distance : 1.033 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 165131 distance : 0.997 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 165131 distance : 1.093 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 165131 distance : 1.819 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 165131 distance : 1.919 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 165131)



  • Original Kopparapu Recent Venus for Star HD 165131 distance : 0.818 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 165131 distance : 1.061 AU
  • Original Kopparapu Moist Greenhouse for Star HD 165131 distance : 1.083 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 165131 distance : 1.852 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 165131 distance : 1.926 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 165131)



    (Position in Stellar Map of star HD 165131 and its Exoplanet HD 165131 b)



    (Zoomed position in Stellar Map of star HD 165131 and its Exoplanet HD 165131 b (zoom level 3))

    (Synthetic Spectrum of star HD 165131*)
    *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