Imaginary Picture of HD 154857 b

Display orbital revolution of HD 154857 b around the hoststar HD 154857
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Exoplanet Name : HD 154857 b
Alternate Name :
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 2.2400 (Mjup) 712.1811 (Mearth)
Semi Major Axis / Orbital Distance Calculated 1.2910 (AU) 1.2910 (AU Est.)
Eccentricity : 0.4600
Orbital Period(Yrs) 1.1187
Orbital Period(Observed/Estimated) 408.60 (Days Obs.) 408.76 (Days Est.)
Star Radiation at Atmospheric Boundary: 2003.4 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 298.6 (K)
Blackbody T 0.3(K) 280.4 (K)
Blackbody T 0.7(K) 226.9 (K)
Tidally Locked Blackbody T 0.1(K) 355.1 (K)
Tidally Locked Blackbody T 0.3(K) 333.5 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Radial Velocity
Mass Detection :
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Habitable
Habitability by Kopparapu: Not habitable
Star Name : HD 154857
Alternate Name :
Star Distance(LY) : 209.6
Stellar Radius(Rsun) : 1.8 (Rsun Measured)
Stellar Mass(Msun) : 1.7 (Msun Measured) 1.7 (Msun Estimated)
Star Age : 5.6 (GY)
Temperature : 5445 (K)
Spectral type : G5V
Metalicity : -0.2
Absolute Magnitude: 3.2
Apparent Magnitude: 7.2
Right Ascension(RA) 257.8155
Declination (DEC) -56.6806
Hubble Space Telescope Guide Star Catalog (GSC) ID 08735-01682
Discovered by
Discovery Paper - Authors "Robert A. Wittenmyer, Jonathan Horner, C.G. Tinney, R.P. Butler, H.R.A. Jones, Mikko Tuomi, G.S. Salter, B.D. Carter, F. Elliott Koch, S.J. O'Toole, J. Bailey, D. Wright"
Discovery Paper - Title The Anglo-Australian Planet Search. XXIII. Two New Jupiter Analogs
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+154857+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/HD%20154857%20b/
HD 154857 b
HD 154857 b

  • HD 154857 b is an exoplanet orbiting the star HD 154857, located about 209.6 light-years (64.3 pc) away from Solar System. Its discovery was publicly announced on 2004.
  • The host star HD 154857 has apparent magnitude of 7.2, with absolute magnitude of 3.2.
  • It is 1.7 times more massive and 1.8 times bigger compared with our Sun. The surface temperature is 5445 with its spectral types of G5V
  • In this planetary system, the extrasolar planet HD 154857 b orbits around the star HD 154857 every 408.6 days with its orbital distance of 1.29 AU ( 193130851.1 km)
  • (Projected orbit of HD 154857 b around its host star HD 154857)


  • The Star HD 154857 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.130 AU ( 169108932.7 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.563 AU ( 233752738.4 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.381 AU ( 356187443.9 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 3.504 AU ( 524145427.3 km)
  • Radiation at Planetary Boundary of HD 154857 b : 2003.41 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 154857)



  • Kopparapu Recent Venus for Star HD 154857 distance : 1.195 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 154857 distance : 1.513 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 154857 distance : 1.461 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 154857 distance : 1.602 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 154857 distance : 2.698 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 154857 distance : 2.846 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 154857)



  • Original Kopparapu Recent Venus for Star HD 154857 distance : 1.189 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 154857 distance : 1.556 AU
  • Original Kopparapu Moist Greenhouse for Star HD 154857 distance : 1.573 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 154857 distance : 2.744 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 154857 distance : 2.854 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 154857)



    (Position in Stellar Map of star HD 154857 and its Exoplanet HD 154857 b)



    (Zoomed position in Stellar Map of star HD 154857 and its Exoplanet HD 154857 b (zoom level 3))