Imaginary Picture of HD 90156 b

Display orbital revolution of HD 90156 b around the hoststar HD 90156
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Exoplanet Name : HD 90156 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.2254 (Rjup) 2.5262 (Rearth)
Mass (Mjup / Me): 0.0570 (Mjup) 18.1225 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.2500 (AU) 0.2500 (AU Est.)
Eccentricity : 0.3100
Orbital Period(Yrs) 0.1363
Orbital Period(Observed/Estimated) 49.77 (Days Obs.) 49.82 (Days Est.)
Surface Gravity (G Earth) 2.8398
Star Radiation at Atmospheric Boundary: 10789.1 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 454.9 (K)
Blackbody T 0.3(K) 427.2 (K)
Blackbody T 0.7(K) 345.6 (K)
Tidally Locked Blackbody T 0.1(K) 540.9 (K)
Tidally Locked Blackbody T 0.3(K) 508.0 (K)
Size Class: sub-Neptune-size
Mass Class:
Detection Type : Radial Velocity
Mass Detection :
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : HD 90156
Alternate Name :
Star Distance(LY) : 71.9
Stellar Radius(Rsun) : 0.7 (Rsun Estimated)
Stellar Mass(Msun) : 0.8 (Msun Measured) 0.8 (Msun Estimated)
Star Age : 4.4 (GY)
Temperature : 5599 (K)
Spectral type : G5V
UV portion[%]: 7.3
Visible portion[%]: 43.9
IR portion[%]: 48.9
Metalicity : -0.2
Absolute Magnitude: 5.2
Apparent Magnitude: 7.0
Right Ascension(RA) 155.9803
Declination (DEC) -29.6456
Hubble Space Telescope Guide Star Catalog (GSC) ID 06631-00431
Discovered by
Discovery Paper - Authors http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+92788+&submit=SIMBAD+search
Discovery Paper - Title
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+90156+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/HD%2090156%20b/
HD 90156 b
HD 90156 b

  • HD 90156 b is an exoplanet orbiting the star HD 90156, located about 71.9 light-years (22.1 pc) away from Solar System. Its discovery was publicly announced on 2009.
  • The host star HD 90156 has apparent magnitude of 7.0, with absolute magnitude of 5.2.
  • It is 0.8 times more massive and 0.7 times bigger compared with our Sun. The surface temperature is 5599 with its spectral types of G5V
  • In this planetary system, the extrasolar planet HD 90156 b orbits around the star HD 90156 every 49.8 days with its orbital distance of 0.25 AU ( 37399467.7 km)
  • (Projected orbit of HD 90156 b around its host star HD 90156)


  • The Star HD 90156 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.508 AU ( 75995499.6 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.702 AU ( 105045640.4 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.070 AU ( 160066309.4 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.575 AU ( 235544586.4 km)
  • Radiation at Planetary Boundary of HD 90156 b : 10789.08 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 90156)



  • Kopparapu Recent Venus for Star HD 90156 distance : 0.532 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 90156 distance : 0.674 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 90156 distance : 0.651 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 90156 distance : 0.714 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 90156 distance : 1.196 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 90156 distance : 1.261 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 90156)



  • Original Kopparapu Recent Venus for Star HD 90156 distance : 0.531 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 90156 distance : 0.693 AU
  • Original Kopparapu Moist Greenhouse for Star HD 90156 distance : 0.703 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 90156 distance : 1.217 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 90156 distance : 1.265 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 90156)



    (Position in Stellar Map of star HD 90156 and its Exoplanet HD 90156 b)



    (Zoomed position in Stellar Map of star HD 90156 and its Exoplanet HD 90156 b (zoom level 3))

    (Synthetic Spectrum of star HD 90156*)
    *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