Imaginary Picture of HD 118865 B

Display orbital revolution of HD 118865 B around the hoststar HD 118865 A
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Exoplanet Name : HD 118865 B
Alternate Name : ULAS J133943.79+010436.4
Status : Confirmed
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 55.0000 (Mjup) 17486.5900 (Mearth)
Semi Major Axis / Orbital Distance Calculated 9200.0000 (AU) 9200.0000 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0000
Orbital Period(Observed/Estimated) 0.00 (Days Obs.) 319133121.20 (Days Est.)
Surface Gravity (G Earth) 168.8738
Star Radiation at Atmospheric Boundary: 0.0 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 3.1 (K)
Blackbody T 0.3(K) 2.9 (K)
Blackbody T 0.7(K) 2.3 (K)
Tidally Locked Blackbody T 0.1(K) 3.7 (K)
Tidally Locked Blackbody T 0.3(K) 3.4 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Imaging
Mass Detection :
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : HD 118865 A
Alternate Name : "2MASS J13393431+0105180, HIP 66637"
Star Distance(LY) : 201.0
Stellar Radius(Rsun) : 1.0 (Rsun Estimated)
Stellar Mass(Msun) : 1.0 (Msun Measured) 0.0 (Msun Estimated)
Star Age : 3.2 (GY)
Temperature : 6300 (K)
Spectral type : F8V
UV portion[%]: 7.8
Visible portion[%]: 44.8
IR portion[%]: 47.4
Metalicity : 0.0
Absolute Magnitude: 4.0
Apparent Magnitude: 8.0
Right Ascension(RA) 204.8930
Declination (DEC) 1.0884
Hubble Space Telescope Guide Star Catalog (GSC) ID 00307-00626
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+118865+&submit=SIMBAD+search
Open Exoplanet Database Link
HD 118865 B
HD 118865 B

  • HD 118865 B is an exoplanet orbiting the star HD 118865 A, located about 201.0 light-years (61.6 pc) away from Solar System. Its discovery was publicly announced on 2013.
  • The host star HD 118865 A has apparent magnitude of 8.0, with absolute magnitude of 4.0.
  • It is 1.0 times more massive and 1.0 times bigger compared with our Sun. The surface temperature is 6300 with its spectral types of F8V
  • (Projected orbit of HD 118865 B around its host star HD 118865 A)


  • The Star HD 118865 A 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.856 AU ( 128019818.0 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.183 AU ( 176956844.0 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.802 AU ( 269643069.8 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.652 AU ( 396791589.5 km)
  • Radiation at Planetary Boundary of HD 118865 B : 0.00 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 118865 A)



  • Kopparapu Recent Venus for Star HD 118865 A distance : 0.859 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 118865 A distance : 1.088 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 118865 A distance : 1.051 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 118865 A distance : 1.152 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 118865 A distance : 1.899 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 118865 A distance : 2.003 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 118865 A)



  • Original Kopparapu Recent Venus for Star HD 118865 A distance : 0.870 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 118865 A distance : 1.116 AU
  • Original Kopparapu Moist Greenhouse for Star HD 118865 A distance : 1.151 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 118865 A distance : 1.934 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 118865 A distance : 2.011 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 118865 A)



    (Position in Stellar Map of star HD 118865 A and its Exoplanet HD 118865 B)



    (Zoomed position in Stellar Map of star HD 118865 A and its Exoplanet HD 118865 B (zoom level 3))

    (Synthetic Spectrum of star HD 118865 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