Imaginary Picture of HD 99492 b

Display orbital revolution of HD 99492 b around the hoststar HD 99492
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Exoplanet Name : HD 99492 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.2429 (Rjup) 2.7231 (Rearth)
Mass (Mjup / Me): 0.0790 (Mjup) 25.1171 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.1230 (AU) 0.1230 (AU Est.)
Eccentricity : 0.0700
Orbital Period(Yrs) 0.0467
Orbital Period(Observed/Estimated) 17.05 (Days Obs.) 17.29 (Days Est.)
Surface Gravity (G Earth) 3.3872
Star Radiation at Atmospheric Boundary: 37709.5 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 621.9 (K)
Blackbody T 0.3(K) 584.1 (K)
Blackbody T 0.7(K) 472.6 (K)
Tidally Locked Blackbody T 0.1(K) 739.6 (K)
Tidally Locked Blackbody T 0.3(K) 694.6 (K)
Size Class: sub-Neptune-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 99492
Alternate Name :
Star Distance(LY) : 59.4
Stellar Radius(Rsun) : 1.0 (Rsun Measured)
Stellar Mass(Msun) : 0.8 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 4.0 (GY)
Temperature : 4740 (K)
Spectral type : K2V
UV portion[%]: 2.3
Visible portion[%]: 34.8
IR portion[%]: 63.0
Metalicity : 0.4
Absolute Magnitude: 6.1
Apparent Magnitude: 7.4
Right Ascension(RA) 171.6928
Declination (DEC) 3.0061
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors 0
Discovery Paper - Title 0
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+99492+&submit=SIMBAD+search
Open Exoplanet Database Link 0
HD 99492 b
HD 99492 b

  • HD 99492 b is an exoplanet orbiting the star HD 99492, located about 59.4 light-years (18.2 pc) away from Solar System. Its discovery was publicly announced on 2004.
  • The host star HD 99492 has apparent magnitude of 7.4, with absolute magnitude of 6.1.
  • It is 0.8 times more massive and 1.0 times bigger compared with our Sun. The surface temperature is 4740 with its spectral types of K2V
  • In this planetary system, the extrasolar planet HD 99492 b orbits around the star HD 99492 every 17.1 days with its orbital distance of 0.12 AU ( 18400538.1 km)
  • (Projected orbit of HD 99492 b around its host star HD 99492)


  • The Star HD 99492 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.467 AU ( 69901424.9 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.646 AU ( 96622036.7 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.984 AU ( 147230601.5 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.448 AU ( 216656279.8 km)
  • Radiation at Planetary Boundary of HD 99492 b : 37709.47 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 99492)



  • Kopparapu Recent Venus for Star HD 99492 distance : 0.511 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 99492 distance : 0.647 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 99492 distance : 0.625 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 99492 distance : 0.687 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 99492 distance : 1.186 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 99492 distance : 1.251 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 99492)



  • Original Kopparapu Recent Venus for Star HD 99492 distance : 0.505 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 99492 distance : 0.668 AU
  • Original Kopparapu Moist Greenhouse for Star HD 99492 distance : 0.668 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 99492 distance : 1.206 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 99492 distance : 1.254 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 99492)



    (Position in Stellar Map of star HD 99492 and its Exoplanet HD 99492 b)



    (Zoomed position in Stellar Map of star HD 99492 and its Exoplanet HD 99492 b (zoom level 3))

    (Synthetic Spectrum of star HD 99492*)
    *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