Imaginary Picture of HD 89345 b
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Exoplanet Name : HD 89345 b
Alternate Name : "K2-234 b, EPIC 248777106 b"
Radius (Rjup / Re): 0.6120 (Rjup) 6.8599 (Rearth)
Mass (Mjup / Me): 0.1123 (Mjup) 35.7044 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.1050 (AU) 0.1050 (AU Est.)
Eccentricity : 0.2030
Orbital Period(Yrs) 0.0323
Orbital Period(Observed/Estimated) 11.81 (Days Obs.) 11.74 (Days Est.)
Star Radiation at Atmospheric Boundary: 302282.5 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1046.5 (K)
Blackbody T 0.3(K) 982.8 (K)
Blackbody T 0.7(K) 795.2 (K)
Tidally Locked Blackbody T 0.1(K) 1244.5 (K)
Tidally Locked Blackbody T 0.3(K) 1168.7 (K)
Size Class: sub-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 89345
Alternate Name : "EPIC 248777106, K2-234"
Star Distance(LY) : 412.9
Stellar Radius(Rsun) : 1.7 (Rsun Measured)
Stellar Mass(Msun) : 1.1 (Msun Measured) 1.1 (Msun Estimated)
Star Age : 9.4 (GY)
Temperature : 5609 (K)
Spectral type : G5V
Metalicity : 0.5
Absolute Magnitude: 3.9
Apparent Magnitude: 9.4
Right Ascension(RA) 154.6708
Declination (DEC) 10.1292
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
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SIMBAD LINK
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HD 89345 b
HD 89345 b

  • HD 89345 b is an exoplanet orbiting the star HD 89345, located about 412.9 light-years (126.6 pc) away from Solar System. Its discovery was publicly announced on 2018.
  • The host star HD 89345 has apparent magnitude of 9.4, with absolute magnitude of 3.9.
  • It is 1.1 times more massive and 1.7 times bigger compared with our Sun. The surface temperature is 5609 with its spectral types of G5V
  • In this planetary system, the extrasolar planet HD 89345 b orbits around the star HD 89345 every 11.8 days with its orbital distance of 0.10 AU ( 15707776.4 km)
  • (Projected orbit of HD 89345 b around its host star HD 89345)


  • The Star HD 89345 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.129 AU ( 168947395.4 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.561 AU ( 233529451.7 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.379 AU ( 355847204.5 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 3.500 AU ( 523644750.1 km)
  • Radiation at Planetary Boundary of HD 89345 b : 302282.49 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 89345)



  • Kopparapu Recent Venus for Star HD 89345 distance : 1.182 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 89345 distance : 1.497 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 89345 distance : 1.446 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 89345 distance : 1.586 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 89345 distance : 2.656 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 89345 distance : 2.802 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 89345)



  • Original Kopparapu Recent Venus for Star HD 89345 distance : 1.180 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 89345 distance : 1.539 AU
  • Original Kopparapu Moist Greenhouse for Star HD 89345 distance : 1.561 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 89345 distance : 2.703 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 89345 distance : 2.811 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 89345)



    (Position in Stellar Map of star HD 89345 and its Exoplanet HD 89345 b)



    (Zoomed position in Stellar Map of star HD 89345 and its Exoplanet HD 89345 b (zoom level 3))