Imaginary Picture of HD 12661 b
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Exoplanet Name : HD 12661 b
Alternate Name :
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 2.3000 (Mjup) 731.2574 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.8300 (AU) 0.8300 (AU Est.)
Eccentricity : 0.3770
Orbital Period(Yrs) 0.7217
Orbital Period(Observed/Estimated) 263.60 (Days Obs.) 267.00 (Days Est.)
Star Radiation at Atmospheric Boundary: 2427.4 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 313.3 (K)
Blackbody T 0.3(K) 294.2 (K)
Blackbody T 0.7(K) 238.0 (K)
Tidally Locked Blackbody T 0.1(K) 372.6 (K)
Tidally Locked Blackbody T 0.3(K) 349.9 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Radial Velocity
Mass Detection :
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Habitable
Habitability by Kopparapu: Not habitable
Star Name : HD 12661
Alternate Name :
Star Distance(LY) : 121.2
Stellar Radius(Rsun) : 1.1 (Rsun Measured)
Stellar Mass(Msun) : 1.1 (Msun Measured) 1.1 (Msun Estimated)
Star Age : 7.0 (GY)
Temperature : 5742 (K)
Spectral type : G6 V
Metalicity : 0.3
Absolute Magnitude: 4.6
Apparent Magnitude: 7.4
Right Ascension(RA) 31.1429
Declination (DEC) 25.4142
Hubble Space Telescope Guide Star Catalog (GSC) ID 0
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+12661+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/HD%2012661%20b/
HD 12661 b
HD 12661 b

  • HD 12661 b is an exoplanet orbiting the star HD 12661, located about 121.2 light-years (37.2 pc) away from Solar System. Its discovery was publicly announced on 2000.
  • The host star HD 12661 has apparent magnitude of 7.4, with absolute magnitude of 4.6.
  • It is 1.1 times more massive and 1.1 times bigger compared with our Sun. The surface temperature is 5742 with its spectral types of G6 V
  • In this planetary system, the extrasolar planet HD 12661 b orbits around the star HD 12661 every 263.6 days with its orbital distance of 0.83 AU ( 124166232.7 km)
  • (Projected orbit of HD 12661 b around its host star HD 12661)


  • The Star HD 12661 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.800 AU ( 119674745.2 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.106 AU ( 165421772.6 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.685 AU ( 252066173.7 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.479 AU ( 370926416.9 km)
  • Radiation at Planetary Boundary of HD 12661 b : 2427.38 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 12661)



  • Kopparapu Recent Venus for Star HD 12661 distance : 0.831 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 12661 distance : 1.052 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 12661 distance : 1.016 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 12661 distance : 1.114 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 12661 distance : 1.860 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 12661 distance : 1.962 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 12661)



  • Original Kopparapu Recent Venus for Star HD 12661 distance : 0.831 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 12661 distance : 1.081 AU
  • Original Kopparapu Moist Greenhouse for Star HD 12661 distance : 1.100 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 12661 distance : 1.893 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 12661 distance : 1.968 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 12661)



    (Position in Stellar Map of star HD 12661 and its Exoplanet HD 12661 b)



    (Zoomed position in Stellar Map of star HD 12661 and its Exoplanet HD 12661 b (zoom level 3))