Imaginary Picture of HD 181433 b

Display orbital revolution of HD 181433 b around the hoststar HD 181433
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Exoplanet Name : HD 181433 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.1490 (Rjup) 1.6700 (Rearth)
Mass (Mjup / Me): 0.0223 (Mjup) 7.0900 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0801 (AU) 0.0801 (AU Est.)
Eccentricity : 0.3360
Orbital Period(Yrs) 0.0257
Orbital Period(Observed/Estimated) 9.37 (Days Obs.) 9.38 (Days Est.)
Surface Gravity (G Earth) 2.5422
Star Radiation at Atmospheric Boundary: 51410.9 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 672.1 (K)
Blackbody T 0.3(K) 631.1 (K)
Blackbody T 0.7(K) 510.7 (K)
Tidally Locked Blackbody T 0.1(K) 799.2 (K)
Tidally Locked Blackbody T 0.3(K) 750.5 (K)
Size Class: super-Earth-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 181433
Alternate Name :
Star Distance(LY) : 87.3
Stellar Radius(Rsun) : 0.7 (Rsun Estimated)
Stellar Mass(Msun) : 0.8 (Msun Measured) 0.8 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 4962 (K)
Spectral type : K3IV
UV portion[%]: 3.1
Visible portion[%]: 36.7
IR portion[%]: 60.3
Metalicity : 0.3
Absolute Magnitude: 6.2
Apparent Magnitude: 8.4
Right Ascension(RA) 291.2899
Declination (DEC) -66.4689
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors 0
Discovery Paper - Title
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+181433+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/HD%20181433%20b/
HD 181433 b
HD 181433 b

  • HD 181433 b is an exoplanet orbiting the star HD 181433, located about 87.3 light-years (26.8 pc) away from Solar System. Its discovery was publicly announced on 2008.
  • The host star HD 181433 has apparent magnitude of 8.4, 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 4962 with its spectral types of K3IV
  • In this planetary system, the extrasolar planet HD 181433 b orbits around the star HD 181433 every 9.4 days with its orbital distance of 0.08 AU ( 11982789.4 km)
  • (Projected orbit of HD 181433 b around its host star HD 181433)


  • The Star HD 181433 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.355 AU ( 53151545.4 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.491 AU ( 73469326.0 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.748 AU ( 111950994.0 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.101 AU ( 164740792.0 km)
  • Radiation at Planetary Boundary of HD 181433 b : 51410.92 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 181433)



  • Kopparapu Recent Venus for Star HD 181433 distance : 0.385 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 181433 distance : 0.487 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 181433 distance : 0.471 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 181433 distance : 0.517 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 181433 distance : 0.885 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 181433 distance : 0.933 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 181433)



  • Original Kopparapu Recent Venus for Star HD 181433 distance : 0.381 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 181433 distance : 0.502 AU
  • Original Kopparapu Moist Greenhouse for Star HD 181433 distance : 0.504 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 181433 distance : 0.900 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 181433 distance : 0.936 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 181433)



    (Position in Stellar Map of star HD 181433 and its Exoplanet HD 181433 b)



    (Zoomed position in Stellar Map of star HD 181433 and its Exoplanet HD 181433 b (zoom level 3))

    (Synthetic Spectrum of star HD 181433*)
    *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