Imaginary Picture of HD 11755 b
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Exoplanet Name : HD 11755 b
Alternate Name :
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 6.5000 (Mjup) 2066.5970 (Mearth)
Semi Major Axis / Orbital Distance Calculated 1.0800 (AU) 1.0800 (AU Est.)
Eccentricity : 0.1900
Orbital Period(Yrs) 1.1874
Orbital Period(Observed/Estimated) 433.70 (Days Obs.) 432.12 (Days Est.)
Star Radiation at Atmospheric Boundary: 270892.9 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1018.2 (K)
Blackbody T 0.3(K) 956.2 (K)
Blackbody T 0.7(K) 773.7 (K)
Tidally Locked Blackbody T 0.1(K) 1210.9 (K)
Tidally Locked Blackbody T 0.3(K) 1137.1 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Radial Velocity
Mass Detection : Radial Velocity
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : HD 11755
Alternate Name :
Star Distance(LY) : 763.8
Stellar Radius(Rsun) : 27.3 (Rsun Measured)
Stellar Mass(Msun) : 0.9 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 10.2 (GY)
Temperature : 4312 (K)
Spectral type : G5
Metalicity : -0.7
Absolute Magnitude: 0.0
Apparent Magnitude: 6.9
Right Ascension(RA) 29.7087
Declination (DEC) 73.1525
Hubble Space Telescope Guide Star Catalog (GSC) ID 04322-01310
Discovered by
Discovery Paper - Authors "B.-C. Lee, M.-G. Park, S.-M. Lee, G. Jeong, H.-I. Oh, I. Han, J.W. Lee, C.-U. Lee, S.-L. Kim, K.-M. Kim"
Discovery Paper - Title "Search for exoplanet around northern circumpolar stars - Four planets around HD 11755, HD 12648, HD 24064, and 8 Ursae Minoris"
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+11755+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/HD%2011755%20b/
HD 11755 b
HD 11755 b

  • HD 11755 b is an exoplanet orbiting the star HD 11755, located about 763.8 light-years (234.2 pc) away from Solar System. Its discovery was publicly announced on 2015.
  • The host star HD 11755 has apparent magnitude of 6.9, with absolute magnitude of 0.0.
  • It is 0.9 times more massive and 27.3 times bigger compared with our Sun. The surface temperature is 4312 with its spectral types of G5
  • In this planetary system, the extrasolar planet HD 11755 b orbits around the star HD 11755 every 433.7 days with its orbital distance of 1.08 AU ( 161565700.4 km)
  • (Projected orbit of HD 11755 b around its host star HD 11755)


  • The Star HD 11755 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 10.996 AU ( 1645046823.3 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 15.200 AU ( 2273884611.9 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 23.161 AU ( 3464896938.9 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 34.083 AU ( 5098747633.0 km)
  • Radiation at Planetary Boundary of HD 11755 b : 270892.89 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 11755)



  • Kopparapu Recent Venus for Star HD 11755 distance : 12.220 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 11755 distance : 15.468 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 11755 distance : 14.940 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 11755 distance : 16.414 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 11755 distance : 28.908 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 11755 distance : 30.495 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 11755)



  • Original Kopparapu Recent Venus for Star HD 11755 distance : 12.057 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 11755 distance : 15.979 AU
  • Original Kopparapu Moist Greenhouse for Star HD 11755 distance : 15.954 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 11755 distance : 29.376 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 11755 distance : 30.550 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 11755)



    (Position in Stellar Map of star HD 11755 and its Exoplanet HD 11755 b)



    (Zoomed position in Stellar Map of star HD 11755 and its Exoplanet HD 11755 b (zoom level 3))