Imaginary Picture of HD 4917 b

Display orbital revolution of HD 4917 b around the hoststar HD 4917
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Exoplanet Name : HD 4917 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 1.2240 (Rjup) 13.7198 (Rearth)
Mass (Mjup / Me): 1.6150 (Mjup) 513.4699 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 1.1665 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 1.0965
Orbital Period(Observed/Estimated) 400.50 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 2.7278
Star Radiation at Atmospheric Boundary: 12029.2 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 467.4 (K)
Blackbody T 0.3(K) 439.0 (K)
Blackbody T 0.7(K) 355.2 (K)
Tidally Locked Blackbody T 0.1(K) 555.9 (K)
Tidally Locked Blackbody T 0.3(K) 522.0 (K)
Size Class: Super-Jupiter-size
Mass Class:
Detection Type : Radial Velocity
Mass Detection : Radial Velocity
Radius Detection : Theoretical
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : HD 4917
Alternate Name :
Star Distance(LY) : 438.4
Stellar Radius(Rsun) : 5.0 (Rsun Measured)
Stellar Mass(Msun) : 1.3 (Msun Measured) 1.3 (Msun Estimated)
Star Age : 2.4 (GY)
Temperature : 4802 (K)
Spectral type : KOIII/IV
UV portion[%]: 2.4
Visible portion[%]: 35.5
IR portion[%]: 62.1
Metalicity : 0.0
Absolute Magnitude: 2.4
Apparent Magnitude: 8.0
Right Ascension(RA) 12.7750
Declination (DEC) -11.0725
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal
Discovery Paper - URL
SIMBAD LINK
Open Exoplanet Database Link
HD 4917 b
HD 4917 b

  • HD 4917 b is an exoplanet orbiting the star HD 4917, located about 438.4 light-years (134.4 pc) away from Solar System. Its discovery was publicly announced on 2013.
  • The host star HD 4917 has apparent magnitude of 8.0, with absolute magnitude of 2.4.
  • It is 1.3 times more massive and 5.0 times bigger compared with our Sun. The surface temperature is 4802 with its spectral types of KOIII/IV
  • In this planetary system, the extrasolar planet HD 4917 b orbits around the star HD 4917 every 400.5 days with its orbital distance of 1.17 AU ( 174498455.1 km)
  • (Projected orbit of HD 4917 b around its host star HD 4917)


  • The Star HD 4917 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 2.503 AU ( 374403715.4 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 3.459 AU ( 517523778.0 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 5.271 AU ( 788591709.9 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 7.757 AU ( 1160447247.2 km)
  • Radiation at Planetary Boundary of HD 4917 b : 12029.19 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 4917)



  • Kopparapu Recent Venus for Star HD 4917 distance : 2.732 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 4917 distance : 3.459 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 4917 distance : 3.341 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 4917 distance : 3.667 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 4917 distance : 6.320 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 4917 distance : 6.667 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 4917)



  • Original Kopparapu Recent Venus for Star HD 4917 distance : 2.699 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 4917 distance : 3.567 AU
  • Original Kopparapu Moist Greenhouse for Star HD 4917 distance : 3.571 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 4917 distance : 6.425 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 4917 distance : 6.682 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 4917)



    (Position in Stellar Map of star HD 4917 and its Exoplanet HD 4917 b)



    (Zoomed position in Stellar Map of star HD 4917 and its Exoplanet HD 4917 b (zoom level 3))

    (Synthetic Spectrum of star HD 4917*)
    *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