Imaginary Picture of HD 135872 b

Display orbital revolution of HD 135872 b around the hoststar HD 135872
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Exoplanet Name : HD 135872 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 5.4890 (Mjup) 1745.1617 (Mearth)
Semi Major Axis / Orbital Distance Calculated 4.1720 (AU) 4.1720 (AU Est.)
Eccentricity : 0.1640
Orbital Period(Yrs) 6.6317
Orbital Period(Observed/Estimated) 2422.30 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 16.8536
Star Radiation at Atmospheric Boundary: 675.8 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 227.6 (K)
Blackbody T 0.3(K) 213.7 (K)
Blackbody T 0.7(K) 172.9 (K)
Tidally Locked Blackbody T 0.1(K) 270.6 (K)
Tidally Locked Blackbody T 0.3(K) 254.1 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : "Radial Velocity, Astrometry"
Mass Detection : Astrometry
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Habitable
Habitability by Kopparapu: Not habitable
Star Name : HD 135872
Alternate Name :
Star Distance(LY) : 268.8
Stellar Radius(Rsun) : 3.9 (Rsun Measured)
Stellar Mass(Msun) : 0.0 (Msun Measured) 1.7 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 4992 (K)
Spectral type : K0IV
UV portion[%]: 3.2
Visible portion[%]: 37.0
IR portion[%]: 59.8
Metalicity : 0.1
Absolute Magnitude: 2.7
Apparent Magnitude: 7.3
Right Ascension(RA) 229.4217
Declination (DEC) -5.2024
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 135872 b
HD 135872 b

  • HD 135872 b is an exoplanet orbiting the star HD 135872, located about 268.8 light-years (82.4 pc) away from Solar System. Its discovery was publicly announced on 2022.
  • The host star HD 135872 has apparent magnitude of 7.3, with absolute magnitude of 2.7.
  • In this planetary system, the extrasolar planet HD 135872 b orbits around the star HD 135872 every 2422.3 days with its orbital distance of 4.17 AU ( 624122316.6 km)
  • (Projected orbit of HD 135872 b around its host star HD 135872)


  • The Star HD 135872 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 2.122 AU ( 317394806.5 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 2.933 AU ( 438722567.8 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 4.469 AU ( 668516104.2 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 6.576 AU ( 983750733.2 km)
  • Radiation at Planetary Boundary of HD 135872 b : 675.77 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 135872)



  • Kopparapu Recent Venus for Star HD 135872 distance : 2.296 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 135872 distance : 2.907 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 135872 distance : 2.808 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 135872 distance : 3.081 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 135872 distance : 5.271 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 135872 distance : 5.559 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 135872)



  • Original Kopparapu Recent Venus for Star HD 135872 distance : 2.272 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 135872 distance : 2.996 AU
  • Original Kopparapu Moist Greenhouse for Star HD 135872 distance : 3.006 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 135872 distance : 5.359 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 135872 distance : 5.573 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 135872)



    (Position in Stellar Map of star HD 135872 and its Exoplanet HD 135872 b)



    (Zoomed position in Stellar Map of star HD 135872 and its Exoplanet HD 135872 b (zoom level 3))

    (Synthetic Spectrum of star HD 135872*)
    *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