Imaginary Picture of HD 7924 d
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Exoplanet Name : HD 7924 d
Alternate Name :
Radius (Rjup / Re): 0.1455 (Rjup) 1.6308 (Rearth)
Mass (Mjup / Me): 0.0203 (Mjup) 6.4541 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.1551 (AU) 0.1551 (AU Est.)
Eccentricity : 0.2100
Orbital Period(Yrs) 0.0669
Orbital Period(Observed/Estimated) 24.45 (Days Obs.) 24.46 (Days Est.)
Star Radiation at Atmospheric Boundary: 22278.4 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 545.3 (K)
Blackbody T 0.3(K) 512.1 (K)
Blackbody T 0.7(K) 414.3 (K)
Tidally Locked Blackbody T 0.1(K) 648.4 (K)
Tidally Locked Blackbody T 0.3(K) 609.0 (K)
Size Class: super-Earth-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 7924
Alternate Name :
Star Distance(LY) : 54.8
Stellar Radius(Rsun) : 0.8 (Rsun Measured)
Stellar Mass(Msun) : 0.8 (Msun Measured) 0.8 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5177 (K)
Spectral type : K0V
Metalicity : -0.1
Absolute Magnitude: 6.1
Apparent Magnitude: 7.2
Right Ascension(RA) 20.4958
Declination (DEC) 76.7103
Hubble Space Telescope Guide Star Catalog (GSC) ID 0
Discovered by
Discovery Paper - Authors "Benjamin J. Fulton, Lauren M. Weiss, Evan Sinukoff, Howard Isaacson, Andrew W. Howard, Geoffrey W. Marcy, Gregory W. Henry, Bradford P. Holden, Robert I. Kibrick"
Discovery Paper - Title Three Super-Earths Orbiting HD 7924
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK 0
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/HD%207924%20d/
HD 7924 d
HD 7924 d

  • HD 7924 d is an exoplanet orbiting the star HD 7924, located about 54.8 light-years (16.8 pc) away from Solar System. Its discovery was publicly announced on 2015.
  • The host star HD 7924 has apparent magnitude of 7.2, with absolute magnitude of 6.1.
  • It is 0.8 times more massive and 0.8 times bigger compared with our Sun. The surface temperature is 5177 with its spectral types of K0V
  • In this planetary system, the extrasolar planet HD 7924 d orbits around the star HD 7924 every 24.5 days with its orbital distance of 0.16 AU ( 23202629.7 km)
  • (Projected orbit of HD 7924 d around its host star HD 7924)


  • The Star HD 7924 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.453 AU ( 67749960.3 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.626 AU ( 93648150.3 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.954 AU ( 142699056.8 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.404 AU ( 209987913.3 km)
  • Radiation at Planetary Boundary of HD 7924 d : 22278.35 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 7924)



  • Kopparapu Recent Venus for Star HD 7924 distance : 0.486 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 7924 distance : 0.615 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 7924 distance : 0.594 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 7924 distance : 0.652 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 7924 distance : 1.107 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 7924 distance : 1.168 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 7924)



  • Original Kopparapu Recent Venus for Star HD 7924 distance : 0.481 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 7924 distance : 0.633 AU
  • Original Kopparapu Moist Greenhouse for Star HD 7924 distance : 0.637 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 7924 distance : 1.126 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 7924 distance : 1.171 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 7924)



    (Position in Stellar Map of star HD 7924 and its Exoplanet HD 7924 d)



    (Zoomed position in Stellar Map of star HD 7924 and its Exoplanet HD 7924 d (zoom level 3))