Imaginary Picture of TOI-1266 b
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Exoplanet Name : TOI-1266 b
Alternate Name :
Radius (Rjup / Re): 0.2193 (Rjup) 2.4580 (Rearth)
Mass (Mjup / Me): 0.0500 (Mjup) 15.8969 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0745 (AU) 0.0745 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0298
Orbital Period(Observed/Estimated) 10.89 (Days Obs.) 11.24 (Days Est.)
Star Radiation at Atmospheric Boundary: 6443.3 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 399.9 (K)
Blackbody T 0.3(K) 375.5 (K)
Blackbody T 0.7(K) 303.8 (K)
Tidally Locked Blackbody T 0.1(K) 475.5 (K)
Tidally Locked Blackbody T 0.3(K) 446.6 (K)
Size Class: sub-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-1266
Alternate Name :
Star Distance(LY) : 117.4
Stellar Radius(Rsun) : 0.4 (Rsun Measured)
Stellar Mass(Msun) : 0.4 (Msun Measured) 0.5 (Msun Estimated)
Star Age : 7.9 (GY)
Temperature : 3573 (K)
Spectral type : M2
Metalicity : -0.1
Absolute Magnitude: 10.2
Apparent Magnitude: 13.0
Right Ascension(RA) 197.9958
Declination (DEC) 65.8336
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-1266 b
TOI-1266 b

  • TOI-1266 b is an exoplanet orbiting the star TOI-1266, located about 117.4 light-years (36.0 pc) away from Solar System. Its discovery was publicly announced on 2020.
  • The host star TOI-1266 has apparent magnitude of 13.0, with absolute magnitude of 10.2.
  • It is 0.4 times more massive and 0.4 times bigger compared with our Sun. The surface temperature is 3573 with its spectral types of M2
  • In this planetary system, the extrasolar planet TOI-1266 b orbits around the star TOI-1266 every 10.9 days with its orbital distance of 0.07 AU ( 11145041.4 km)
  • (Projected orbit of TOI-1266 b around its host star TOI-1266)


  • The Star TOI-1266 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.117 AU ( 17501066.4 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.162 AU ( 24191047.3 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.246 AU ( 36861802.7 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.363 AU ( 54243757.4 km)
  • Radiation at Planetary Boundary of TOI-1266 b : 6443.25 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star TOI-1266)



  • Kopparapu Recent Venus for Star TOI-1266 distance : 0.132 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star TOI-1266 distance : 0.167 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star TOI-1266 distance : 0.161 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star TOI-1266 distance : 0.178 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI-1266 distance : 0.324 AU
  • Kopparapu Outer Boundary for Early Mars for Star TOI-1266 distance : 0.342 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star TOI-1266)



  • Original Kopparapu Recent Venus for Star TOI-1266 distance : 0.131 AU
  • Original Kopparapu Runaway Greenhouse for Star TOI-1266 distance : 0.173 AU
  • Original Kopparapu Moist Greenhouse for Star TOI-1266 distance : 0.173 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI-1266 distance : 0.329 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star TOI-1266 distance : 0.342 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star TOI-1266)



    (Position in Stellar Map of star TOI-1266 and its Exoplanet TOI-1266 b)



    (Zoomed position in Stellar Map of star TOI-1266 and its Exoplanet TOI-1266 b (zoom level 3))