Imaginary Picture of HD 158996 b
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Exoplanet Name : HD 158996 b
Alternate Name :
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 14.0000 (Mjup) 4451.1320 (Mearth)
Semi Major Axis / Orbital Distance Calculated 2.1000 (AU) 2.1000 (AU Est.)
Eccentricity : 0.1300
Orbital Period(Yrs) 2.2455
Orbital Period(Observed/Estimated) 820.20 (Days Obs.) 828.48 (Days Est.)
Star Radiation at Atmospheric Boundary: 192864.8 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 935.3 (K)
Blackbody T 0.3(K) 878.4 (K)
Blackbody T 0.7(K) 710.7 (K)
Tidally Locked Blackbody T 0.1(K) 1112.3 (K)
Tidally Locked Blackbody T 0.3(K) 1044.5 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Radial Velocity
Mass Detection : Radial Velocity
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : HD 158996
Alternate Name :
Star Distance(LY) : 959.2
Stellar Radius(Rsun) : 50.3 (Rsun Measured)
Stellar Mass(Msun) : 1.8 (Msun Measured) 1.8 (Msun Estimated)
Star Age : 1.6 (GY)
Temperature : 4069 (K)
Spectral type : K5 III
Metalicity : -0.2
Absolute Magnitude: -1.5
Apparent Magnitude: 5.8
Right Ascension(RA) 259.9046
Declination (DEC) 80.1364
Hubble Space Telescope Guide Star Catalog (GSC) ID 04576-01486
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+158996+&submit=SIMBAD+search
Open Exoplanet Database Link
HD 158996 b
HD 158996 b

  • HD 158996 b is an exoplanet orbiting the star HD 158996, located about 959.2 light-years (294.1 pc) away from Solar System. Its discovery was publicly announced on 2018.
  • The host star HD 158996 has apparent magnitude of 5.8, with absolute magnitude of -1.5.
  • It is 1.8 times more massive and 50.3 times bigger compared with our Sun. The surface temperature is 4069 with its spectral types of K5 III
  • In this planetary system, the extrasolar planet HD 158996 b orbits around the star HD 158996 every 820.2 days with its orbital distance of 2.10 AU ( 314155528.5 km)
  • (Projected orbit of HD 158996 b around its host star HD 158996)


  • The Star HD 158996 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 18.042 AU ( 2698991253.9 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 24.938 AU ( 3730711243.6 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 38.000 AU ( 5684778330.7 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 55.919 AU ( 8365400347.7 km)
  • Radiation at Planetary Boundary of HD 158996 b : 192864.79 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 158996)



  • Kopparapu Recent Venus for Star HD 158996 distance : 20.180 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 158996 distance : 25.543 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 158996 distance : 24.669 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 158996 distance : 27.113 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 158996 distance : 48.307 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 158996 distance : 50.962 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 158996)



  • Original Kopparapu Recent Venus for Star HD 158996 distance : 19.927 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 158996 distance : 26.407 AU
  • Original Kopparapu Moist Greenhouse for Star HD 158996 distance : 26.367 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 158996 distance : 49.082 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 158996 distance : 51.044 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 158996)



    (Position in Stellar Map of star HD 158996 and its Exoplanet HD 158996 b)



    (Zoomed position in Stellar Map of star HD 158996 and its Exoplanet HD 158996 b (zoom level 3))