Imaginary Picture of HD 103720 b
/
Exoplanet Name : HD 103720 b
Alternate Name :
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 0.6200 (Mjup) 197.1216 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0498 (AU) 0.0498 (AU Est.)
Eccentricity : 0.0860
Orbital Period(Yrs) 0.0125
Orbital Period(Observed/Estimated) 4.56 (Days Obs.) 4.56 (Days Est.)
Star Radiation at Atmospheric Boundary: 166943.0 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 902.2 (K)
Blackbody T 0.3(K) 847.2 (K)
Blackbody T 0.7(K) 685.5 (K)
Tidally Locked Blackbody T 0.1(K) 1072.9 (K)
Tidally Locked Blackbody T 0.3(K) 1007.5 (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 103720
Alternate Name :
Star Distance(LY) : 149.8
Stellar Radius(Rsun) : 0.7 (Rsun Measured)
Stellar Mass(Msun) : 0.8 (Msun Measured) 0.8 (Msun Estimated)
Star Age : 3.8 (GY)
Temperature : 5017 (K)
Spectral type : K3V
Metalicity : -0.0
Absolute Magnitude: 6.2
Apparent Magnitude: 9.5
Right Ascension(RA) 179.1716
Declination (DEC) -2.7789
Hubble Space Telescope Guide Star Catalog (GSC) ID 04935-00756
Discovered by
Discovery Paper - Authors "C. Moutou, G. Lo Curto, M. Mayor, F. Bouchy, W. Benz, C. Lovis, D. Naef, F. Pepe, D. Queloz, N.C. Santos, D. Segransan, S. G. Sousa, S. Udry"
Discovery Paper - Title The HARPS search for southern extra-solar planets XXXVI: Five new long-period giant planets and a system update
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+103720+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/HD%20103720%20b/
HD 103720 b
HD 103720 b

  • HD 103720 b is an exoplanet orbiting the star HD 103720, located about 149.8 light-years (45.9 pc) away from Solar System. Its discovery was publicly announced on 2014.
  • The host star HD 103720 has apparent magnitude of 9.5, with absolute magnitude of 6.2.
  • It is 0.8 times more massive and 0.7 times bigger compared with our Sun. The surface temperature is 5017 with its spectral types of K3V
  • In this planetary system, the extrasolar planet HD 103720 b orbits around the star HD 103720 every 4.6 days with its orbital distance of 0.05 AU ( 7449974.0 km)
  • (Projected orbit of HD 103720 b around its host star HD 103720)


  • The Star HD 103720 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.398 AU ( 59548273.5 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.550 AU ( 82311275.9 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.838 AU ( 125424169.0 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.234 AU ( 184567159.1 km)
  • Radiation at Planetary Boundary of HD 103720 b : 166943.01 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 103720)



  • Kopparapu Recent Venus for Star HD 103720 distance : 0.430 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 103720 distance : 0.545 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 103720 distance : 0.526 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 103720 distance : 0.577 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 103720 distance : 0.987 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 103720 distance : 1.041 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 103720)



  • Original Kopparapu Recent Venus for Star HD 103720 distance : 0.426 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 103720 distance : 0.561 AU
  • Original Kopparapu Moist Greenhouse for Star HD 103720 distance : 0.563 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 103720 distance : 1.003 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 103720 distance : 1.043 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 103720)



    (Position in Stellar Map of star HD 103720 and its Exoplanet HD 103720 b)



    (Zoomed position in Stellar Map of star HD 103720 and its Exoplanet HD 103720 b (zoom level 3))