Imaginary Picture of HD 10442 b

Display orbital revolution of HD 10442 b around the hoststar HD 10442
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Exoplanet Name : HD 10442 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 2.1000 (Mjup) 667.6698 (Mearth)
Semi Major Axis / Orbital Distance Calculated 2.3350 (AU) 2.3350 (AU Est.)
Eccentricity : 0.1100
Orbital Period(Yrs) 2.8555
Orbital Period(Observed/Estimated) 1043.00 (Days Obs.) 1043.42 (Days Est.)
Surface Gravity (G Earth) 6.4479
Star Radiation at Atmospheric Boundary: 257.7 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 178.8 (K)
Blackbody T 0.3(K) 167.9 (K)
Blackbody T 0.7(K) 135.9 (K)
Tidally Locked Blackbody T 0.1(K) 212.7 (K)
Tidally Locked Blackbody T 0.3(K) 199.7 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Primary Transit
Mass Detection : Radial Velocity
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : HD 10442
Alternate Name :
Star Distance(LY) : 423.0
Stellar Radius(Rsun) : 1.3 (Rsun Estimated)
Stellar Mass(Msun) : 1.6 (Msun Measured) 1.6 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5034 (K)
Spectral type : K2 IV
UV portion[%]: 3.4
Visible portion[%]: 37.5
IR portion[%]: 59.1
Metalicity : 0.1
Absolute Magnitude: 2.3
Apparent Magnitude: 7.8
Right Ascension(RA) 25.4756
Declination (DEC) 2.7044
Hubble Space Telescope Guide Star Catalog (GSC) ID 00032-00383
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+10442+&submit=SIMBAD+search
Open Exoplanet Database Link
HD 10442 b
HD 10442 b

  • HD 10442 b is an exoplanet orbiting the star HD 10442, located about 423.0 light-years (129.7 pc) away from Solar System. Its discovery was publicly announced on 2014.
  • The host star HD 10442 has apparent magnitude of 7.8, with absolute magnitude of 2.3.
  • It is 1.6 times more massive and 1.3 times bigger compared with our Sun. The surface temperature is 5034 with its spectral types of K2 IV
  • In this planetary system, the extrasolar planet HD 10442 b orbits around the star HD 10442 every 1043.0 days with its orbital distance of 2.33 AU ( 349311028.1 km)
  • (Projected orbit of HD 10442 b around its host star HD 10442)


  • The Star HD 10442 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.733 AU ( 109694432.7 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.014 AU ( 151626372.6 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.544 AU ( 231045037.0 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.273 AU ( 339992893.3 km)
  • Radiation at Planetary Boundary of HD 10442 b : 257.68 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 10442)



  • Kopparapu Recent Venus for Star HD 10442 distance : 0.792 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 10442 distance : 1.003 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 10442 distance : 0.968 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 10442 distance : 1.063 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 10442 distance : 1.815 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 10442 distance : 1.914 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 10442)



  • Original Kopparapu Recent Venus for Star HD 10442 distance : 0.784 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 10442 distance : 1.033 AU
  • Original Kopparapu Moist Greenhouse for Star HD 10442 distance : 1.037 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 10442 distance : 1.845 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 10442 distance : 1.919 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 10442)



    (Position in Stellar Map of star HD 10442 and its Exoplanet HD 10442 b)



    (Zoomed position in Stellar Map of star HD 10442 and its Exoplanet HD 10442 b (zoom level 3))

    (Synthetic Spectrum of star HD 10442*)
    *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