Imaginary Picture of TOI-129 b

Display orbital revolution of TOI-129 b around the hoststar TOI-129
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Exoplanet Name : TOI-129 b
Alternate Name : HIP 65A b
Status : Confirmed
Radius (Rjup / Re): 2.0300 (Rjup) 22.7543 (Rearth)
Mass (Mjup / Me): 3.2130 (Mjup) 1021.5348 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0178 (AU) 0.0178 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0027
Orbital Period(Observed/Estimated) 0.98 (Days Obs.) 0.98 (Days Est.)
Surface Gravity (G Earth) 1.9730
Star Radiation at Atmospheric Boundary: 898994.8 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1374.3 (K)
Blackbody T 0.3(K) 1290.6 (K)
Blackbody T 0.7(K) 1044.2 (K)
Tidally Locked Blackbody T 0.1(K) 1634.3 (K)
Tidally Locked Blackbody T 0.3(K) 1534.8 (K)
Size Class: Sub-Star-size
Mass Class:
Detection Type : Primary Transit
Mass Detection : Radial Velocity
Radius Detection : Primary Transit
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : TOI-129
Alternate Name : HIP 65A
Star Distance(LY) : 201.9
Stellar Radius(Rsun) : 0.7 (Rsun Measured)
Stellar Mass(Msun) : 0.8 (Msun Measured) 0.8 (Msun Estimated)
Star Age : 4.1 (GY)
Temperature : 4590 (K)
Spectral type : K4V
UV portion[%]: 1.9
Visible portion[%]: 32.6
IR portion[%]: 65.6
Metalicity : 0.2
Absolute Magnitude: 7.1
Apparent Magnitude: 11.1
Right Ascension(RA) 0.1875
Declination (DEC) -54.8308
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
TOI-129 b
TOI-129 b

  • TOI-129 b is an exoplanet orbiting the star TOI-129, located about 201.9 light-years (61.9 pc) away from Solar System. Its discovery was publicly announced on 2020.
  • The host star TOI-129 has apparent magnitude of 11.1, with absolute magnitude of 7.1.
  • It is 0.8 times more massive and 0.7 times bigger compared with our Sun. The surface temperature is 4590 with its spectral types of K4V
  • In this planetary system, the extrasolar planet TOI-129 b orbits around the star TOI-129 every 1.0 days with its orbital distance of 0.02 AU ( 2665834.1 km)
  • (Projected orbit of TOI-129 b around its host star TOI-129)


  • The Star TOI-129 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.331 AU ( 49447234.1 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.457 AU ( 68348999.7 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.696 AU ( 104148749.9 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.024 AU ( 153259447.9 km)
  • Radiation at Planetary Boundary of TOI-129 b : 898994.83 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star TOI-129)



  • Kopparapu Recent Venus for Star TOI-129 distance : 0.364 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star TOI-129 distance : 0.461 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star TOI-129 distance : 0.445 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star TOI-129 distance : 0.489 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI-129 distance : 0.850 AU
  • Kopparapu Outer Boundary for Early Mars for Star TOI-129 distance : 0.896 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star TOI-129)



  • Original Kopparapu Recent Venus for Star TOI-129 distance : 0.359 AU
  • Original Kopparapu Runaway Greenhouse for Star TOI-129 distance : 0.475 AU
  • Original Kopparapu Moist Greenhouse for Star TOI-129 distance : 0.475 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI-129 distance : 0.864 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star TOI-129 distance : 0.898 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star TOI-129)



    (Position in Stellar Map of star TOI-129 and its Exoplanet TOI-129 b)



    (Zoomed position in Stellar Map of star TOI-129 and its Exoplanet TOI-129 b (zoom level 3))

    (Synthetic Spectrum of star TOI-129*)
    *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