Imaginary Picture of HD 87646 A b
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Exoplanet Name : HD 87646 A b
Alternate Name :
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 12.4000 (Mjup) 3942.4312 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.1170 (AU) 0.1170 (AU Est.)
Eccentricity : 0.0500
Orbital Period(Yrs) 0.0369
Orbital Period(Observed/Estimated) 13.48 (Days Obs.) 13.81 (Days Est.)
Star Radiation at Atmospheric Boundary: 238561.2 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 986.4 (K)
Blackbody T 0.3(K) 926.3 (K)
Blackbody T 0.7(K) 749.5 (K)
Tidally Locked Blackbody T 0.1(K) 1173.0 (K)
Tidally Locked Blackbody T 0.3(K) 1101.6 (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 87646 A
Alternate Name :
Star Distance(LY) : 0.0
Stellar Radius(Rsun) : 1.6 (Rsun Measured)
Stellar Mass(Msun) : 1.1 (Msun Measured) 1.2 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5770 (K)
Spectral type : G1IV
Metalicity : -0.2
Absolute Magnitude: 25.0
Apparent Magnitude: 8.0
Right Ascension(RA) 151.6699
Declination (DEC) 17.8951
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+87646A+&submit=SIMBAD+search
Open Exoplanet Database Link
HD 87646 A b
HD 87646 A b

  • HD 87646 A b is an exoplanet orbiting the star HD 87646 A. Its discovery was publicly announced on 2016.
  • The host star HD 87646 A has apparent magnitude of 8.0, with absolute magnitude of 25.0.
  • It is 1.1 times more massive and 1.6 times bigger compared with our Sun. The surface temperature is 5770 with its spectral types of G1IV
  • In this planetary system, the extrasolar planet HD 87646 A b orbits around the star HD 87646 A every 13.5 days with its orbital distance of 0.12 AU ( 17502950.9 km)
  • (Projected orbit of HD 87646 A b around its host star HD 87646 A)


  • The Star HD 87646 A 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.118 AU ( 167240492.2 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.545 AU ( 231170065.3 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.355 AU ( 352252021.7 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 3.465 AU ( 518354281.2 km)
  • Radiation at Planetary Boundary of HD 87646 A b : 238561.16 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 87646 A)



  • Kopparapu Recent Venus for Star HD 87646 A distance : 1.159 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 87646 A distance : 1.468 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 87646 A distance : 1.418 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 87646 A distance : 1.554 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 87646 A distance : 2.593 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 87646 A distance : 2.735 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 87646 A)



  • Original Kopparapu Recent Venus for Star HD 87646 A distance : 1.161 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 87646 A distance : 1.509 AU
  • Original Kopparapu Moist Greenhouse for Star HD 87646 A distance : 1.536 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 87646 A distance : 2.638 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 87646 A distance : 2.744 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 87646 A)



    (Position in Stellar Map of star HD 87646 A and its Exoplanet HD 87646 A b)



    (Zoomed position in Stellar Map of star HD 87646 A and its Exoplanet HD 87646 A b (zoom level 3))