Imaginary Picture of HD 142245 A b

Display orbital revolution of HD 142245 A b around the hoststar HD 142245 A
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Exoplanet Name : HD 142245 A b
Alternate Name : HD 142245 b
Status : Confirmed
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 1.9000 (Mjup) 604.0822 (Mearth)
Semi Major Axis / Orbital Distance Calculated 2.7700 (AU) 2.7700 (AU Est.)
Eccentricity : 0.3200
Orbital Period(Yrs) 3.5564
Orbital Period(Observed/Estimated) 1299.00 (Days Obs.) 1295.29 (Days Est.)
Surface Gravity (G Earth) 5.8338
Star Radiation at Atmospheric Boundary: 2446.9 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 313.9 (K)
Blackbody T 0.3(K) 294.8 (K)
Blackbody T 0.7(K) 238.5 (K)
Tidally Locked Blackbody T 0.1(K) 373.3 (K)
Tidally Locked Blackbody T 0.3(K) 350.6 (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 142245 A
Alternate Name : HD 142245
Star Distance(LY) : 325.5
Stellar Radius(Rsun) : 5.2 (Rsun Measured)
Stellar Mass(Msun) : 1.7 (Msun Measured) 1.7 (Msun Estimated)
Star Age : 2.3 (GY)
Temperature : 4878 (K)
Spectral type : K0
UV portion[%]: 2.7
Visible portion[%]: 36.0
IR portion[%]: 61.3
Metalicity : 0.2
Absolute Magnitude: 2.6
Apparent Magnitude: 7.6
Right Ascension(RA) 238.2345
Declination (DEC) 15.4308
Hubble Space Telescope Guide Star Catalog (GSC) ID 01496-01841
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+142245+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/HD%20142245%20b/
HD 142245 A b
HD 142245 A b

  • HD 142245 A b is an exoplanet orbiting the star HD 142245 A, located about 325.5 light-years (99.8 pc) away from Solar System. Its discovery was publicly announced on 2011.
  • The host star HD 142245 A has apparent magnitude of 7.6, with absolute magnitude of 2.6.
  • It is 1.7 times more massive and 5.2 times bigger compared with our Sun. The surface temperature is 4878 with its spectral types of K0
  • In this planetary system, the extrasolar planet HD 142245 A b orbits around the star HD 142245 A every 1299.0 days with its orbital distance of 2.77 AU ( 414386101.8 km)
  • (Projected orbit of HD 142245 A b around its host star HD 142245 A)


  • The Star HD 142245 A 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 2.681 AU ( 401000623.7 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 3.705 AU ( 554287655.9 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 5.646 AU ( 844611724.0 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 8.308 AU ( 1242883151.9 km)
  • Radiation at Planetary Boundary of HD 142245 A b : 2446.92 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 142245 A)



  • Kopparapu Recent Venus for Star HD 142245 A distance : 2.916 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 142245 A distance : 3.692 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 142245 A distance : 3.566 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 142245 A distance : 3.914 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 142245 A distance : 6.725 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 142245 A distance : 7.094 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 142245 A)



  • Original Kopparapu Recent Venus for Star HD 142245 A distance : 2.882 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 142245 A distance : 3.806 AU
  • Original Kopparapu Moist Greenhouse for Star HD 142245 A distance : 3.814 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 142245 A distance : 6.837 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 142245 A distance : 7.110 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 142245 A)



    (Position in Stellar Map of star HD 142245 A and its Exoplanet HD 142245 A b)



    (Zoomed position in Stellar Map of star HD 142245 A and its Exoplanet HD 142245 A b (zoom level 3))

    (Synthetic Spectrum of star HD 142245 A*)
    *Yamashiki YA et al. 2019 ApJ 881 114
    MUSCLES Paper I - France et al. 2016 ApJ 820 89
    MUSCLES Paper II- Youngblood et al. 2016 ApJ 824 101
    MUSCLES Paper III- Loyd et al. 2016 ApJ 824 102