Imaginary Picture of HD 30856 b
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Exoplanet Name : HD 30856 b
Alternate Name :
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 1.8000 (Mjup) 572.2884 (Mearth)
Semi Major Axis / Orbital Distance Calculated 2.0000 (AU) 2.0000 (AU Est.)
Eccentricity : 0.2400
Orbital Period(Yrs) 2.4969
Orbital Period(Observed/Estimated) 912.00 (Days Obs.) 889.14 (Days Est.)
Star Radiation at Atmospheric Boundary: 3331.6 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 339.1 (K)
Blackbody T 0.3(K) 318.4 (K)
Blackbody T 0.7(K) 257.6 (K)
Tidally Locked Blackbody T 0.1(K) 403.2 (K)
Tidally Locked Blackbody T 0.3(K) 378.7 (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 30856
Alternate Name :
Star Distance(LY) : 430.9
Stellar Radius(Rsun) : 4.2 (Rsun Measured)
Stellar Mass(Msun) : 1.4 (Msun Measured) 1.3 (Msun Estimated)
Star Age : 3.8 (GY)
Temperature : 4982 (K)
Spectral type : K0III
Metalicity : -0.1
Absolute Magnitude: 2.5
Apparent Magnitude: 8.1
Right Ascension(RA) 72.5744
Declination (DEC) -24.3689
Hubble Space Telescope Guide Star Catalog (GSC) ID 06466-01769
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+30856+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/HD%2030856%20b/
HD 30856 b
HD 30856 b

  • HD 30856 b is an exoplanet orbiting the star HD 30856, located about 430.9 light-years (132.1 pc) away from Solar System. Its discovery was publicly announced on 2011.
  • The host star HD 30856 has apparent magnitude of 8.1, with absolute magnitude of 2.5.
  • It is 1.4 times more massive and 4.2 times bigger compared with our Sun. The surface temperature is 4982 with its spectral types of K0III
  • In this planetary system, the extrasolar planet HD 30856 b orbits around the star HD 30856 every 912.0 days with its orbital distance of 2.00 AU ( 299195741.4 km)
  • (Projected orbit of HD 30856 b around its host star HD 30856)


  • The Star HD 30856 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 2.258 AU ( 337842941.2 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 3.122 AU ( 466987233.6 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 4.757 AU ( 711585199.9 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 7.000 AU ( 1047128794.3 km)
  • Radiation at Planetary Boundary of HD 30856 b : 3331.64 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 30856)



  • Kopparapu Recent Venus for Star HD 30856 distance : 2.445 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 30856 distance : 3.096 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 30856 distance : 2.990 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 30856 distance : 3.282 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 30856 distance : 5.615 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 30856 distance : 5.923 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 30856)



  • Original Kopparapu Recent Venus for Star HD 30856 distance : 2.419 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 30856 distance : 3.190 AU
  • Original Kopparapu Moist Greenhouse for Star HD 30856 distance : 3.201 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 30856 distance : 5.709 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 30856 distance : 5.937 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 30856)



    (Position in Stellar Map of star HD 30856 and its Exoplanet HD 30856 b)



    (Zoomed position in Stellar Map of star HD 30856 and its Exoplanet HD 30856 b (zoom level 3))