Imaginary Picture of HD 164922 d

Display orbital revolution of HD 164922 d around the hoststar HD 164922
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Exoplanet Name : HD 164922 d
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.0340 (Rjup) 0.3809 (Rearth)
Mass (Mjup / Me): 0.0001 (Mjup) 0.0331 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.1229 (AU) 0.1229 (AU Est.)
Eccentricity : 0.0860
Orbital Period(Yrs) 0.0341
Orbital Period(Observed/Estimated) 12.46 (Days Obs.) 16.84 (Days Est.)
Surface Gravity (G Earth) 0.2281
Star Radiation at Atmospheric Boundary: 63576.7 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 708.7 (K)
Blackbody T 0.3(K) 665.6 (K)
Blackbody T 0.7(K) 538.5 (K)
Tidally Locked Blackbody T 0.1(K) 842.8 (K)
Tidally Locked Blackbody T 0.3(K) 791.5 (K)
Size Class: Mercury-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 164922
Alternate Name :
Star Distance(LY) : 72.2
Stellar Radius(Rsun) : 1.0 (Rsun Measured)
Stellar Mass(Msun) : 0.9 (Msun Measured) 1.6 (Msun Estimated)
Star Age : 13.4 (GY)
Temperature : 5293 (K)
Spectral type : G9V
UV portion[%]: 5.7
Visible portion[%]: 41.3
IR portion[%]: 52.9
Metalicity : 0.2
Absolute Magnitude: 5.3
Apparent Magnitude: 7.0
Right Ascension(RA) 270.6286
Declination (DEC) 26.3128
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+164922+&submit=SIMBAD+search
Open Exoplanet Database Link
HD 164922 d
HD 164922 d

  • HD 164922 d is an exoplanet orbiting the star HD 164922, located about 72.2 light-years (22.1 pc) away from Solar System. Its discovery was publicly announced on 2020.
  • The host star HD 164922 has apparent magnitude of 7.0, with absolute magnitude of 5.3.
  • It is 0.9 times more massive and 1.0 times bigger compared with our Sun. The surface temperature is 5293 with its spectral types of G9V
  • In this planetary system, the extrasolar planet HD 164922 d orbits around the star HD 164922 every 12.5 days with its orbital distance of 0.12 AU ( 18388570.3 km)
  • (Projected orbit of HD 164922 d around its host star HD 164922)


  • The Star HD 164922 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.606 AU ( 90704198.2 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.838 AU ( 125376905.8 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.277 AU ( 191046658.5 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.879 AU ( 281133527.2 km)
  • Radiation at Planetary Boundary of HD 164922 d : 63576.74 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 164922)



  • Kopparapu Recent Venus for Star HD 164922 distance : 0.646 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 164922 distance : 0.818 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 164922 distance : 0.790 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 164922 distance : 0.867 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 164922 distance : 1.467 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 164922 distance : 1.547 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 164922)



  • Original Kopparapu Recent Venus for Star HD 164922 distance : 0.642 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 164922 distance : 0.842 AU
  • Original Kopparapu Moist Greenhouse for Star HD 164922 distance : 0.849 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 164922 distance : 1.492 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 164922 distance : 1.551 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 164922)



    (Position in Stellar Map of star HD 164922 and its Exoplanet HD 164922 d)



    (Zoomed position in Stellar Map of star HD 164922 and its Exoplanet HD 164922 d (zoom level 3))

    (Synthetic Spectrum of star HD 164922*)
    *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