Imaginary Picture of HD 38801 b

Display orbital revolution of HD 38801 b around the hoststar HD 38801
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Exoplanet Name : HD 38801 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 1.1340 (Rjup) 12.7110 (Rearth)
Mass (Mjup / Me): 10.1300 (Mjup) 3220.7119 (Mearth)
Semi Major Axis / Orbital Distance Calculated 1.6600 (AU) 1.6600 (AU Est.)
Eccentricity : 0.0590
Orbital Period(Yrs) 1.8803
Orbital Period(Observed/Estimated) 686.80 (Days Obs.) 695.93 (Days Est.)
Surface Gravity (G Earth) 19.9339
Star Radiation at Atmospheric Boundary: 1900.1 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 294.7 (K)
Blackbody T 0.3(K) 276.7 (K)
Blackbody T 0.7(K) 223.9 (K)
Tidally Locked Blackbody T 0.1(K) 350.4 (K)
Tidally Locked Blackbody T 0.3(K) 329.1 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Radial Velocity
Mass Detection : Radial Velocity
Radius Detection : Theoretical
Habitability by Solar Eq. Astronomical Unit: Habitable
Habitability by Kopparapu: Not habitable
Star Name : HD 38801
Alternate Name :
Star Distance(LY) : 297.6
Stellar Radius(Rsun) : 2.4 (Rsun Measured)
Stellar Mass(Msun) : 1.3 (Msun Measured) 1.3 (Msun Estimated)
Star Age : 4.7 (GY)
Temperature : 5207 (K)
Spectral type : K0IV
UV portion[%]: 5.1
Visible portion[%]: 40.2
IR portion[%]: 54.7
Metalicity : 0.3
Absolute Magnitude: 3.5
Apparent Magnitude: 8.3
Right Ascension(RA) 86.9966
Declination (DEC) -8.3277
Hubble Space Telescope Guide Star Catalog (GSC) ID 05347-00367
Discovered by
Discovery Paper - Authors 0
Discovery Paper - Title
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+38801+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/HD%2038801%20b/
HD 38801 b
HD 38801 b

  • HD 38801 b is an exoplanet orbiting the star HD 38801, located about 297.6 light-years (91.2 pc) away from Solar System. Its discovery was publicly announced on 2010.
  • The host star HD 38801 has apparent magnitude of 8.3, with absolute magnitude of 3.5.
  • It is 1.3 times more massive and 2.4 times bigger compared with our Sun. The surface temperature is 5207 with its spectral types of K0IV
  • In this planetary system, the extrasolar planet HD 38801 b orbits around the star HD 38801 every 686.8 days with its orbital distance of 1.66 AU ( 248332465.4 km)
  • (Projected orbit of HD 38801 b around its host star HD 38801)


  • The Star HD 38801 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.416 AU ( 211763111.9 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.957 AU ( 292711961.0 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.982 AU ( 446028251.5 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 4.387 AU ( 656350111.3 km)
  • Radiation at Planetary Boundary of HD 38801 b : 1900.09 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 38801)



  • Kopparapu Recent Venus for Star HD 38801 distance : 1.516 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 38801 distance : 1.919 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 38801 distance : 1.853 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 38801 distance : 2.033 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 38801 distance : 3.450 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 38801 distance : 3.640 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 38801)



  • Original Kopparapu Recent Venus for Star HD 38801 distance : 1.503 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 38801 distance : 1.976 AU
  • Original Kopparapu Moist Greenhouse for Star HD 38801 distance : 1.989 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 38801 distance : 3.509 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 38801 distance : 3.649 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 38801)



    (Position in Stellar Map of star HD 38801 and its Exoplanet HD 38801 b)



    (Zoomed position in Stellar Map of star HD 38801 and its Exoplanet HD 38801 b (zoom level 3))

    (Synthetic Spectrum of star HD 38801*)
    *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