Imaginary Picture of HD 127506 c

Display orbital revolution of HD 127506 c around the hoststar HD 127506
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Exoplanet Name : HD 127506 c
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 47.4090 (Mjup) 15073.1226 (Mearth)
Semi Major Axis / Orbital Distance Calculated 3.4530 (AU) 3.4530 (AU Est.)
Eccentricity : 0.6970
Orbital Period(Yrs) 7.3359
Orbital Period(Observed/Estimated) 2679.50 (Days Obs.) 2742.99 (Days Est.)
Surface Gravity (G Earth) 145.5662
Star Radiation at Atmospheric Boundary: 24.8 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 99.6 (K)
Blackbody T 0.3(K) 93.6 (K)
Blackbody T 0.7(K) 75.7 (K)
Tidally Locked Blackbody T 0.1(K) 118.5 (K)
Tidally Locked Blackbody T 0.3(K) 111.3 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : "Radial Velocity, Astrometry"
Mass Detection : Astrometry
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : HD 127506
Alternate Name : GJ 554
Star Distance(LY) : 73.5
Stellar Radius(Rsun) : 0.7 (Rsun Measured)
Stellar Mass(Msun) : 0.7 (Msun Measured) 0.8 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 4595 (K)
Spectral type : K3.5V
UV portion[%]: 1.9
Visible portion[%]: 32.6
IR portion[%]: 65.5
Metalicity : -0.1
Absolute Magnitude: 6.9
Apparent Magnitude: 8.7
Right Ascension(RA) 217.6874
Declination (DEC) 35.4537
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 127506 c
HD 127506 c

  • HD 127506 c is an exoplanet orbiting the star HD 127506, located about 73.5 light-years (22.5 pc) away from Solar System. Its discovery was publicly announced on 2022.
  • The host star HD 127506 has apparent magnitude of 8.7, with absolute magnitude of 6.9.
  • It is 0.7 times more massive and 0.7 times bigger compared with our Sun. The surface temperature is 4595 with its spectral types of K3.5V
  • In this planetary system, the extrasolar planet HD 127506 c orbits around the star HD 127506 every 2679.5 days with its orbital distance of 3.45 AU ( 516561447.5 km)
  • (Projected orbit of HD 127506 c around its host star HD 127506)


  • The Star HD 127506 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.337 AU ( 50341934.5 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.465 AU ( 69585709.4 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.709 AU ( 106033221.8 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.043 AU ( 156032530.8 km)
  • Radiation at Planetary Boundary of HD 127506 c : 24.82 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 127506)



  • Kopparapu Recent Venus for Star HD 127506 distance : 0.370 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 127506 distance : 0.469 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 127506 distance : 0.453 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 127506 distance : 0.497 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 127506 distance : 0.865 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 127506 distance : 0.912 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 127506)



  • Original Kopparapu Recent Venus for Star HD 127506 distance : 0.366 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 127506 distance : 0.484 AU
  • Original Kopparapu Moist Greenhouse for Star HD 127506 distance : 0.484 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 127506 distance : 0.879 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 127506 distance : 0.914 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 127506)



    (Position in Stellar Map of star HD 127506 and its Exoplanet HD 127506 c)



    (Zoomed position in Stellar Map of star HD 127506 and its Exoplanet HD 127506 c (zoom level 3))

    (Synthetic Spectrum of star HD 127506*)
    *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