Imaginary Picture of HD 55696 b

Display orbital revolution of HD 55696 b around the hoststar HD 55696
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Exoplanet Name : HD 55696 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 3.8700 (Mjup) 1230.4201 (Mearth)
Semi Major Axis / Orbital Distance Calculated 3.1800 (AU) 3.1800 (AU Est.)
Eccentricity : 0.7050
Orbital Period(Yrs) 5.0019
Orbital Period(Observed/Estimated) 1827.00 (Days Obs.) 1823.63 (Days Est.)
Surface Gravity (G Earth) 11.8826
Star Radiation at Atmospheric Boundary: 375.4 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 196.5 (K)
Blackbody T 0.3(K) 184.5 (K)
Blackbody T 0.7(K) 149.3 (K)
Tidally Locked Blackbody T 0.1(K) 233.6 (K)
Tidally Locked Blackbody T 0.3(K) 219.4 (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 55696
Alternate Name :
Star Distance(LY) : 254.9
Stellar Radius(Rsun) : 1.5 (Rsun Measured)
Stellar Mass(Msun) : 1.3 (Msun Measured) 1.3 (Msun Estimated)
Star Age : 2.6 (GY)
Temperature : 6050 (K)
Spectral type : G0V
UV portion[%]: 0.3
Visible portion[%]: 1.5
IR portion[%]: 98.2
Metalicity : 0.4
Absolute Magnitude: 3.4
Apparent Magnitude: 7.9
Right Ascension(RA) 108.0624
Declination (DEC) -38.1745
Hubble Space Telescope Guide Star Catalog (GSC) ID 07630-00767
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+55696+&submit=SIMBAD+search
Open Exoplanet Database Link
HD 55696 b
HD 55696 b

  • HD 55696 b is an exoplanet orbiting the star HD 55696, located about 254.9 light-years (78.1 pc) away from Solar System. Its discovery was publicly announced on 2018.
  • The host star HD 55696 has apparent magnitude of 7.9, with absolute magnitude of 3.4.
  • It is 1.3 times more massive and 1.5 times bigger compared with our Sun. The surface temperature is 6050 with its spectral types of G0V
  • In this planetary system, the extrasolar planet HD 55696 b orbits around the star HD 55696 every 1827.0 days with its orbital distance of 3.18 AU ( 475721228.8 km)
  • (Projected orbit of HD 55696 b around its host star HD 55696)


  • The Star HD 55696 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.205 AU ( 180306942.8 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.666 AU ( 249231314.8 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.539 AU ( 379773368.9 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 3.736 AU ( 558853149.2 km)
  • Radiation at Planetary Boundary of HD 55696 b : 375.37 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 55696)



  • Kopparapu Recent Venus for Star HD 55696 distance : 1.229 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 55696 distance : 1.556 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 55696 distance : 1.503 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 55696 distance : 1.647 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 55696 distance : 2.730 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 55696 distance : 2.879 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 55696)



  • Original Kopparapu Recent Venus for Star HD 55696 distance : 1.237 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 55696 distance : 1.598 AU
  • Original Kopparapu Moist Greenhouse for Star HD 55696 distance : 1.637 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 55696 distance : 2.778 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 55696 distance : 2.889 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 55696)



    (Position in Stellar Map of star HD 55696 and its Exoplanet HD 55696 b)



    (Zoomed position in Stellar Map of star HD 55696 and its Exoplanet HD 55696 b (zoom level 3))

    (Synthetic Spectrum of star HD 55696*)
    *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