Imaginary Picture of TOI 125 b

Display orbital revolution of TOI 125 b around the hoststar TOI 125
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Exoplanet Name : TOI 125 b
Alternate Name :
Radius (Rjup / Re): 0.2458 (Rjup) 2.7551 (Rearth)
Mass (Mjup / Me): 0.0267 (Mjup) 8.4889 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0521 (AU) 0.0521 (AU Est.)
Eccentricity : 0.1830
Orbital Period(Yrs) 0.0127
Orbital Period(Observed/Estimated) 4.65 (Days Obs.) 4.65 (Days Est.)
Surface Gravity (G Earth) 1.1184
Star Radiation at Atmospheric Boundary: 255271.4 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1003.2 (K)
Blackbody T 0.3(K) 942.1 (K)
Blackbody T 0.7(K) 762.3 (K)
Tidally Locked Blackbody T 0.1(K) 1193.0 (K)
Tidally Locked Blackbody T 0.3(K) 1120.4 (K)
Size Class: sub-Neptune-size
Mass Class:
Detection Type : Primary Transit
Mass Detection : Theoretical
Radius Detection : Primary Transit
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : TOI 125
Alternate Name :
Star Distance(LY) : 363.3
Stellar Radius(Rsun) : 0.9 (Rsun Measured)
Stellar Mass(Msun) : 0.9 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 6.6 (GY)
Temperature : 5282 (K)
Spectral type : K0
UV portion[%]: 5.7
Visible portion[%]: 41.2
IR portion[%]: 53.1
Metalicity : 0.1
Absolute Magnitude: 5.7
Apparent Magnitude: 10.9
Right Ascension(RA) 23.5958
Declination (DEC) -66.6758
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 125 b
TOI 125 b

  • TOI 125 b is an exoplanet orbiting the star TOI 125, located about 363.3 light-years (111.4 pc) away from Solar System. Its discovery was publicly announced on 2019.
  • The host star TOI 125 has apparent magnitude of 10.9, with absolute magnitude of 5.7.
  • It is 0.9 times more massive and 0.9 times bigger compared with our Sun. The surface temperature is 5282 with its spectral types of K0
  • In this planetary system, the extrasolar planet TOI 125 b orbits around the star TOI 125 every 4.7 days with its orbital distance of 0.05 AU ( 7794049.1 km)
  • (Projected orbit of TOI 125 b around its host star TOI 125)


  • The Star TOI 125 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.515 AU ( 77036137.7 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.712 AU ( 106484074.3 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.085 AU ( 162258164.4 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.596 AU ( 238769996.9 km)
  • Radiation at Planetary Boundary of TOI 125 b : 255271.39 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star TOI 125)



  • Kopparapu Recent Venus for Star TOI 125 distance : 0.549 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star TOI 125 distance : 0.695 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star TOI 125 distance : 0.672 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star TOI 125 distance : 0.737 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI 125 distance : 1.247 AU
  • Kopparapu Outer Boundary for Early Mars for Star TOI 125 distance : 1.315 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star TOI 125)



  • Original Kopparapu Recent Venus for Star TOI 125 distance : 0.545 AU
  • Original Kopparapu Runaway Greenhouse for Star TOI 125 distance : 0.716 AU
  • Original Kopparapu Moist Greenhouse for Star TOI 125 distance : 0.721 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI 125 distance : 1.268 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star TOI 125 distance : 1.319 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star TOI 125)



    (Position in Stellar Map of star TOI 125 and its Exoplanet TOI 125 b)



    (Zoomed position in Stellar Map of star TOI 125 and its Exoplanet TOI 125 b (zoom level 3))

    (Synthetic Spectrum of star TOI 125*)
    *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