Imaginary Picture of HD 35173 b

Display orbital revolution of HD 35173 b around the hoststar HD 35173
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Exoplanet Name : HD 35173 b
Alternate Name :
Status : Suspended
Radius (Rjup / Re): 0.2077 (Rjup) 2.3286 (Rearth)
Mass (Mjup / Me): 0.0400 (Mjup) 12.7175 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.2170 (AU) 0.2170 (AU Est.)
Eccentricity : 0.1600
Orbital Period(Yrs) 0.1137
Orbital Period(Observed/Estimated) 41.52 (Days Obs.) 41.54 (Days Est.)
Surface Gravity (G Earth) 2.3455
Star Radiation at Atmospheric Boundary: 6696.4 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 403.7 (K)
Blackbody T 0.3(K) 379.2 (K)
Blackbody T 0.7(K) 306.8 (K)
Tidally Locked Blackbody T 0.1(K) 480.1 (K)
Tidally Locked Blackbody T 0.3(K) 450.9 (K)
Size Class: sub-Neptune-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 35173
Alternate Name :
Star Distance(LY) : 108.3
Stellar Radius(Rsun) : 0.7 (Rsun Estimated)
Stellar Mass(Msun) : 0.8 (Msun Measured) 0.8 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 4881 (K)
Spectral type : K2V
UV portion[%]: 2.7
Visible portion[%]: 36.0
IR portion[%]: 61.3
Metalicity : 0.0
Absolute Magnitude: 19.4
Apparent Magnitude: 22.0
Right Ascension(RA) 109.0400
Declination (DEC) -3.6700
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 35173 b
HD 35173 b

  • HD 35173 b is an exoplanet orbiting the star HD 35173, located about 108.3 light-years (33.2 pc) away from Solar System. Its discovery was publicly announced on 2019.
  • The host star HD 35173 has apparent magnitude of 22.0, with absolute magnitude of 19.4.
  • It is 0.8 times more massive and 0.7 times bigger compared with our Sun. The surface temperature is 4881 with its spectral types of K2V
  • In this planetary system, the extrasolar planet HD 35173 b orbits around the star HD 35173 every 41.5 days with its orbital distance of 0.22 AU ( 32462737.9 km)
  • (Projected orbit of HD 35173 b around its host star HD 35173)


  • The Star HD 35173 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.347 AU ( 51967962.8 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.480 AU ( 71833305.4 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.732 AU ( 109458060.8 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.077 AU ( 161072331.5 km)
  • Radiation at Planetary Boundary of HD 35173 b : 6696.39 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 35173)



  • Kopparapu Recent Venus for Star HD 35173 distance : 0.378 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 35173 distance : 0.478 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 35173 distance : 0.462 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 35173 distance : 0.507 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 35173 distance : 0.871 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 35173 distance : 0.919 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 35173)



  • Original Kopparapu Recent Venus for Star HD 35173 distance : 0.373 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 35173 distance : 0.493 AU
  • Original Kopparapu Moist Greenhouse for Star HD 35173 distance : 0.494 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 35173 distance : 0.886 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 35173 distance : 0.921 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 35173)



    (Position in Stellar Map of star HD 35173 and its Exoplanet HD 35173 b)



    (Zoomed position in Stellar Map of star HD 35173 and its Exoplanet HD 35173 b (zoom level 3))

    (Synthetic Spectrum of star HD 35173*)
    *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