Imaginary Picture of HD 331093 b

Display orbital revolution of HD 331093 b around the hoststar HD 331093
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Exoplanet Name : HD 331093 b
Alternate Name :
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 1.5000 (Mjup) 476.9070 (Mearth)
Semi Major Axis / Orbital Distance Calculated 1.4400 (AU) 1.4400 (AU Est.)
Eccentricity : 0.5900
Orbital Period(Yrs) 1.7019
Orbital Period(Observed/Estimated) 621.62 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 4.6056
Star Radiation at Atmospheric Boundary: 250.5 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 177.6 (K)
Blackbody T 0.3(K) 166.7 (K)
Blackbody T 0.7(K) 134.9 (K)
Tidally Locked Blackbody T 0.1(K) 211.2 (K)
Tidally Locked Blackbody T 0.3(K) 198.3 (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 331093
Alternate Name :
Star Distance(LY) : 163.9
Stellar Radius(Rsun) : 0.7 (Rsun Estimated)
Stellar Mass(Msun) : 0.0 (Msun Measured) 1.0 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5240 (K)
Spectral type : K0
UV portion[%]: 5.3
Visible portion[%]: 40.7
IR portion[%]: 54.0
Metalicity : 0.0
Absolute Magnitude: 4.5
Apparent Magnitude: 8.0
Right Ascension(RA) 295.6208
Declination (DEC) 31.7403
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 331093 b
HD 331093 b

  • HD 331093 b is an exoplanet orbiting the star HD 331093, located about 163.9 light-years (50.3 pc) away from Solar System. Its discovery was publicly announced on 2021.
  • The host star HD 331093 has apparent magnitude of 8.0, with absolute magnitude of 4.5.
  • In this planetary system, the extrasolar planet HD 331093 b orbits around the star HD 331093 every 621.6 days with its orbital distance of 1.44 AU ( 215420933.8 km)
  • (Projected orbit of HD 331093 b around its host star HD 331093)


  • The Star HD 331093 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.446 AU ( 66696798.2 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.616 AU ( 92192405.0 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.939 AU ( 140480823.1 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.382 AU ( 206723685.3 km)
  • Radiation at Planetary Boundary of HD 331093 b : 250.48 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 331093)



  • Kopparapu Recent Venus for Star HD 331093 distance : 0.476 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 331093 distance : 0.603 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 331093 distance : 0.583 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 331093 distance : 0.639 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 331093 distance : 1.084 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 331093 distance : 1.143 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 331093)



  • Original Kopparapu Recent Venus for Star HD 331093 distance : 0.473 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 331093 distance : 0.621 AU
  • Original Kopparapu Moist Greenhouse for Star HD 331093 distance : 0.626 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 331093 distance : 1.102 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 331093 distance : 1.146 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 331093)



    (Position in Stellar Map of star HD 331093 and its Exoplanet HD 331093 b)



    (Zoomed position in Stellar Map of star HD 331093 and its Exoplanet HD 331093 b (zoom level 3))

    (Synthetic Spectrum of star HD 331093*)
    *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