Imaginary Picture of HD 189733 b
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Exoplanet Name : HD 189733 b
Alternate Name :
Radius (Rjup / Re): 1.1380 (Rjup) 12.7558 (Rearth)
Mass (Mjup / Me): 1.1420 (Mjup) 363.0852 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0314 (AU) 0.0314 (AU Est.)
Eccentricity : 0.0041
Orbital Period(Yrs) 0.0061
Orbital Period(Observed/Estimated) 2.22 (Days Obs.) 2.27 (Days Est.)
Star Radiation at Atmospheric Boundary: 454655.8 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1158.9 (K)
Blackbody T 0.3(K) 1088.4 (K)
Blackbody T 0.7(K) 880.6 (K)
Tidally Locked Blackbody T 0.1(K) 1378.2 (K)
Tidally Locked Blackbody T 0.3(K) 1294.3 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Primary Transit
Mass Detection : Radial Velocity
Radius Detection : Primary Transit
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : HD 189733
Alternate Name :
Star Distance(LY) : 64.5
Stellar Radius(Rsun) : 0.8 (Rsun Measured)
Stellar Mass(Msun) : 0.8 (Msun Measured) 0.8 (Msun Estimated)
Star Age : 0.6 (GY)
Temperature : 4875 (K)
Spectral type : K1-K2
Metalicity : -0.0
Absolute Magnitude: 6.2
Apparent Magnitude: 7.7
Right Ascension(RA) 300.1821
Declination (DEC) 22.7108
Hubble Space Telescope Guide Star Catalog (GSC) ID 02141-00972
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+189733+&submit=SIMBAD+search
Open Exoplanet Database Link
HD 189733 b
HD 189733 b

  • HD 189733 b is an exoplanet orbiting the star HD 189733, located about 64.5 light-years (19.8 pc) away from Solar System. Its discovery was publicly announced on 2005.
  • The host star HD 189733 has apparent magnitude of 7.7, with absolute magnitude of 6.2.
  • It is 0.8 times more massive and 0.8 times bigger compared with our Sun. The surface temperature is 4875 with its spectral types of K1-K2
  • In this planetary system, the extrasolar planet HD 189733 b orbits around the star HD 189733 every 2.2 days with its orbital distance of 0.03 AU ( 4700365.1 km)
  • (Projected orbit of HD 189733 b around its host star HD 189733)


  • The Star HD 189733 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.414 AU ( 62001648.0 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.573 AU ( 85702480.5 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.873 AU ( 130591614.3 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.285 AU ( 192171281.3 km)
  • Radiation at Planetary Boundary of HD 189733 b : 454655.75 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 189733)



  • Kopparapu Recent Venus for Star HD 189733 distance : 0.451 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 189733 distance : 0.571 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 189733 distance : 0.551 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 189733 distance : 0.605 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 189733 distance : 1.040 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 189733 distance : 1.097 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 189733)



  • Original Kopparapu Recent Venus for Star HD 189733 distance : 0.446 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 189733 distance : 0.589 AU
  • Original Kopparapu Moist Greenhouse for Star HD 189733 distance : 0.590 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 189733 distance : 1.057 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 189733 distance : 1.100 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 189733)



    (Position in Stellar Map of star HD 189733 and its Exoplanet HD 189733 b)



    (Zoomed position in Stellar Map of star HD 189733 and its Exoplanet HD 189733 b (zoom level 3))