Imaginary Picture of HD 42936 b

Display orbital revolution of HD 42936 b around the hoststar HD 42936
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Exoplanet Name : HD 42936 b
Alternate Name : DMPP-3A b
Status : Confirmed
Radius (Rjup / Re): 0.1150 (Rjup) 1.2890 (Rearth)
Mass (Mjup / Me): 0.0081 (Mjup) 2.5817 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0662 (AU) 0.0662 (AU Est.)
Eccentricity : 0.1400
Orbital Period(Yrs) 0.0183
Orbital Period(Observed/Estimated) 6.67 (Days Obs.) 6.67 (Days Est.)
Surface Gravity (G Earth) 1.5537
Star Radiation at Atmospheric Boundary: 161490.9 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 894.7 (K)
Blackbody T 0.3(K) 840.2 (K)
Blackbody T 0.7(K) 679.8 (K)
Tidally Locked Blackbody T 0.1(K) 1064.0 (K)
Tidally Locked Blackbody T 0.3(K) 999.2 (K)
Size Class: super-Earth-size
Mass Class:
Detection Type : Radial Velocity
Mass Detection : Spectrum
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : HD 42936
Alternate Name :
Star Distance(LY) : 153.1
Stellar Radius(Rsun) : 0.9 (Rsun Measured)
Stellar Mass(Msun) : 0.9 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 10.9 (GY)
Temperature : 5138 (K)
Spectral type : KOIV
UV portion[%]: 4.3
Visible portion[%]: 39.1
IR portion[%]: 56.6
Metalicity : 0.2
Absolute Magnitude: 5.7
Apparent Magnitude: 9.1
Right Ascension(RA) 91.6244
Declination (DEC) -72.5128
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+42936+&submit=SIMBAD+search
Open Exoplanet Database Link
HD 42936 b
HD 42936 b

  • HD 42936 b is an exoplanet orbiting the star HD 42936, located about 153.1 light-years (47.0 pc) away from Solar System. Its discovery was publicly announced on 2019.
  • The host star HD 42936 has apparent magnitude of 9.1, with absolute magnitude of 5.7.
  • It is 0.9 times more massive and 0.9 times bigger compared with our Sun. The surface temperature is 5138 with its spectral types of KOIV
  • In this planetary system, the extrasolar planet HD 42936 b orbits around the star HD 42936 every 6.7 days with its orbital distance of 0.07 AU ( 9903379.0 km)
  • (Projected orbit of HD 42936 b around its host star HD 42936)


  • The Star HD 42936 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.520 AU ( 77855214.3 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.719 AU ( 107616252.2 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.096 AU ( 163983352.9 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.613 AU ( 241308687.5 km)
  • Radiation at Planetary Boundary of HD 42936 b : 161490.89 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 42936)



  • Kopparapu Recent Venus for Star HD 42936 distance : 0.559 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 42936 distance : 0.708 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 42936 distance : 0.684 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 42936 distance : 0.750 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 42936 distance : 1.276 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 42936 distance : 1.346 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 42936)



  • Original Kopparapu Recent Venus for Star HD 42936 distance : 0.554 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 42936 distance : 0.729 AU
  • Original Kopparapu Moist Greenhouse for Star HD 42936 distance : 0.733 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 42936 distance : 1.298 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 42936 distance : 1.350 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 42936)



    (Position in Stellar Map of star HD 42936 and its Exoplanet HD 42936 b)



    (Zoomed position in Stellar Map of star HD 42936 and its Exoplanet HD 42936 b (zoom level 3))

    (Synthetic Spectrum of star HD 42936*)
    *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