Imaginary Picture of HD 74156 b

Display orbital revolution of HD 74156 b around the hoststar HD 74156
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Exoplanet Name : HD 74156 b
Alternate Name :
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 1.7780 (Mjup) 565.2938 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.2916 (AU) 0.2916 (AU Est.)
Eccentricity : 0.6380
Orbital Period(Yrs) 0.1414
Orbital Period(Observed/Estimated) 51.64 (Days Obs.) 51.65 (Days Est.)
Star Radiation at Atmospheric Boundary: 48944.3 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 663.8 (K)
Blackbody T 0.3(K) 623.4 (K)
Blackbody T 0.7(K) 504.4 (K)
Tidally Locked Blackbody T 0.1(K) 789.5 (K)
Tidally Locked Blackbody T 0.3(K) 741.4 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Radial Velocity
Mass Detection :
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : HD 74156
Alternate Name :
Star Distance(LY) : 210.2
Stellar Radius(Rsun) : 1.6 (Rsun Measured)
Stellar Mass(Msun) : 1.2 (Msun Measured) 1.2 (Msun Estimated)
Star Age : 3.7 (GY)
Temperature : 5960 (K)
Spectral type : G1V
Metalicity : 0.1
Absolute Magnitude: 3.6
Apparent Magnitude: 7.6
Right Ascension(RA) 130.6047
Declination (DEC) 4.5781
Hubble Space Telescope Guide Star Catalog (GSC) ID 00219-01438
Discovered by
Discovery Paper - Authors "Feng,.atherina; Wright,ason.; Nelson,enjamin; Wang,haron.; Ford,ric.; Marcy,eoffrey.; Isaacson,oward; Howard,ndrew."
Discovery Paper - Title The California Planet Survey IV: A Planet Orbiting the Giant Star HD 145934 and Updates to Seven Systems with Long-period Planets
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+74156+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/HD%2074156%20b/
HD 74156 b
HD 74156 b

  • HD 74156 b is an exoplanet orbiting the star HD 74156, located about 210.2 light-years (64.4 pc) away from Solar System. Its discovery was publicly announced on 2003.
  • The host star HD 74156 has apparent magnitude of 7.6, with absolute magnitude of 3.6.
  • It is 1.2 times more massive and 1.6 times bigger compared with our Sun. The surface temperature is 5960 with its spectral types of G1V
  • In this planetary system, the extrasolar planet HD 74156 b orbits around the star HD 74156 every 51.6 days with its orbital distance of 0.29 AU ( 43622739.1 km)
  • (Projected orbit of HD 74156 b around its host star HD 74156)


  • The Star HD 74156 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.262 AU ( 188796735.2 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.744 AU ( 260966426.6 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.658 AU ( 397655082.4 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 3.912 AU ( 585166873.8 km)
  • Radiation at Planetary Boundary of HD 74156 b : 48944.34 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 74156)



  • Kopparapu Recent Venus for Star HD 74156 distance : 1.294 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 74156 distance : 1.638 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 74156 distance : 1.582 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 74156 distance : 1.734 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 74156 distance : 2.880 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 74156 distance : 3.037 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 74156)



  • Original Kopparapu Recent Venus for Star HD 74156 distance : 1.300 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 74156 distance : 1.682 AU
  • Original Kopparapu Moist Greenhouse for Star HD 74156 distance : 1.720 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 74156 distance : 2.931 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 74156 distance : 3.048 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 74156)



    (Position in Stellar Map of star HD 74156 and its Exoplanet HD 74156 b)



    (Zoomed position in Stellar Map of star HD 74156 and its Exoplanet HD 74156 b (zoom level 3))