Imaginary Picture of HD 211810 b

Display orbital revolution of HD 211810 b around the hoststar HD 211810
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Exoplanet Name : HD 211810 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 0.6700 (Mjup) 213.0185 (Mearth)
Semi Major Axis / Orbital Distance Calculated 2.6560 (AU) 2.6560 (AU Est.)
Eccentricity : 0.6800
Orbital Period(Yrs) 4.2655
Orbital Period(Observed/Estimated) 1558.00 (Days Obs.) 1557.81 (Days Est.)
Surface Gravity (G Earth) 2.0572
Star Radiation at Atmospheric Boundary: 226.5 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 173.1 (K)
Blackbody T 0.3(K) 162.6 (K)
Blackbody T 0.7(K) 131.6 (K)
Tidally Locked Blackbody T 0.1(K) 205.9 (K)
Tidally Locked Blackbody T 0.3(K) 193.4 (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 211810
Alternate Name :
Star Distance(LY) : 211.2
Stellar Radius(Rsun) : 1.1 (Rsun Measured)
Stellar Mass(Msun) : 1.0 (Msun Measured) 1.0 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5652 (K)
Spectral type : G5
UV portion[%]: 7.5
Visible portion[%]: 44.2
IR portion[%]: 48.4
Metalicity : 0.2
Absolute Magnitude: 4.5
Apparent Magnitude: 8.6
Right Ascension(RA) 334.5272
Declination (DEC) 61.1344
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal
Discovery Paper - URL
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+211810&submit=SIMBAD+search
Open Exoplanet Database Link
HD 211810 b
HD 211810 b

  • HD 211810 b is an exoplanet orbiting the star HD 211810, located about 211.2 light-years (64.8 pc) away from Solar System. Its discovery was publicly announced on 2018.
  • The host star HD 211810 has apparent magnitude of 8.6, with absolute magnitude of 4.5.
  • It is 1.0 times more massive and 1.1 times bigger compared with our Sun. The surface temperature is 5652 with its spectral types of G5
  • In this planetary system, the extrasolar planet HD 211810 b orbits around the star HD 211810 every 1558.0 days with its orbital distance of 2.66 AU ( 397331944.6 km)
  • (Projected orbit of HD 211810 b around its host star HD 211810)


  • The Star HD 211810 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.782 AU ( 116987877.7 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.081 AU ( 161707819.5 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.647 AU ( 246406931.1 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.424 AU ( 362598593.5 km)
  • Radiation at Planetary Boundary of HD 211810 b : 226.52 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 211810)



  • Kopparapu Recent Venus for Star HD 211810 distance : 0.817 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 211810 distance : 1.034 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 211810 distance : 0.999 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 211810 distance : 1.095 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 211810 distance : 1.833 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 211810 distance : 1.933 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 211810)



  • Original Kopparapu Recent Venus for Star HD 211810 distance : 0.816 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 211810 distance : 1.063 AU
  • Original Kopparapu Moist Greenhouse for Star HD 211810 distance : 1.079 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 211810 distance : 1.865 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 211810 distance : 1.939 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 211810)



    (Position in Stellar Map of star HD 211810 and its Exoplanet HD 211810 b)



    (Zoomed position in Stellar Map of star HD 211810 and its Exoplanet HD 211810 b (zoom level 3))

    (Synthetic Spectrum of star HD 211810*)
    *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