Imaginary Picture of TOI-431 d

Display orbital revolution of TOI-431 d around the hoststar TOI-431
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Exoplanet Name : TOI-431 d
Alternate Name : HIP 26013 d
Status : Confirmed
Radius (Rjup / Re): 0.2935 (Rjup) 3.2898 (Rearth)
Mass (Mjup / Me): 0.0311 (Mjup) 9.8879 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0980 (AU) 0.0980 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0341
Orbital Period(Observed/Estimated) 12.46 (Days Obs.) 12.69 (Days Est.)
Surface Gravity (G Earth) 0.9136
Star Radiation at Atmospheric Boundary: 37753.3 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 622.1 (K)
Blackbody T 0.3(K) 584.2 (K)
Blackbody T 0.7(K) 472.7 (K)
Tidally Locked Blackbody T 0.1(K) 739.8 (K)
Tidally Locked Blackbody T 0.3(K) 694.8 (K)
Size Class: Neptune-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-431
Alternate Name : HIP 26013
Star Distance(LY) : 106.4
Stellar Radius(Rsun) : 0.7 (Rsun Measured)
Stellar Mass(Msun) : 0.8 (Msun Measured) 0.8 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 4850 (K)
Spectral type : K3
UV portion[%]: 2.6
Visible portion[%]: 35.8
IR portion[%]: 61.6
Metalicity : 0.2
Absolute Magnitude: 6.6
Apparent Magnitude: 9.1
Right Ascension(RA) 83.2708
Declination (DEC) -26.7239
Hubble Space Telescope Guide Star Catalog (GSC) ID 06484-01486
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal
Discovery Paper - URL
SIMBAD LINK https://simbad.u-strasbg.fr/simbad/sim-basic?Ident=TOI-431&submit=SIMBAD+search
Open Exoplanet Database Link
TOI-431 d
TOI-431 d

  • TOI-431 d is an exoplanet orbiting the star TOI-431, located about 106.4 light-years (32.6 pc) away from Solar System. Its discovery was publicly announced on 2021.
  • The host star TOI-431 has apparent magnitude of 9.1, with absolute magnitude of 6.6.
  • It is 0.8 times more massive and 0.7 times bigger compared with our Sun. The surface temperature is 4850 with its spectral types of K3
  • In this planetary system, the extrasolar planet TOI-431 d orbits around the star TOI-431 every 12.5 days with its orbital distance of 0.10 AU ( 14660591.3 km)
  • (Projected orbit of TOI-431 d around its host star TOI-431)


  • The Star TOI-431 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.373 AU ( 55726140.6 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.515 AU ( 77028089.3 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.785 AU ( 117373761.9 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.155 AU ( 172720632.4 km)
  • Radiation at Planetary Boundary of TOI-431 d : 37753.25 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star TOI-431)



  • Kopparapu Recent Venus for Star TOI-431 distance : 0.406 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star TOI-431 distance : 0.514 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star TOI-431 distance : 0.496 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star TOI-431 distance : 0.545 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI-431 distance : 0.937 AU
  • Kopparapu Outer Boundary for Early Mars for Star TOI-431 distance : 0.988 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star TOI-431)



  • Original Kopparapu Recent Venus for Star TOI-431 distance : 0.401 AU
  • Original Kopparapu Runaway Greenhouse for Star TOI-431 distance : 0.530 AU
  • Original Kopparapu Moist Greenhouse for Star TOI-431 distance : 0.531 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI-431 distance : 0.952 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star TOI-431 distance : 0.990 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star TOI-431)



    (Position in Stellar Map of star TOI-431 and its Exoplanet TOI-431 d)



    (Zoomed position in Stellar Map of star TOI-431 and its Exoplanet TOI-431 d (zoom level 3))

    (Synthetic Spectrum of star TOI-431*)
    *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