Imaginary Picture of TOI-266 c

Display orbital revolution of TOI-266 c around the hoststar TOI-266
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Exoplanet Name : TOI-266 c
Alternate Name : HIP 8152 c
Status : Confirmed
Radius (Rjup / Re): 0.2213 (Rjup) 2.4806 (Rearth)
Mass (Mjup / Me): 9.4000 (Mjup) 2988.6172 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.1442 (AU Est.)
Eccentricity : 0.2800
Orbital Period(Yrs) 0.0537
Orbital Period(Observed/Estimated) 19.61 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 485.7063
Star Radiation at Atmospheric Boundary: 55893.4 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 686.3 (K)
Blackbody T 0.3(K) 644.5 (K)
Blackbody T 0.7(K) 521.4 (K)
Tidally Locked Blackbody T 0.1(K) 816.1 (K)
Tidally Locked Blackbody T 0.3(K) 766.4 (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-266
Alternate Name : HIP 8152
Star Distance(LY) : 331.7
Stellar Radius(Rsun) : 0.9 (Rsun Measured)
Stellar Mass(Msun) : 1.0 (Msun Measured) 1.0 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5784 (K)
Spectral type : G2
UV portion[%]: 0.3
Visible portion[%]: 1.5
IR portion[%]: 98.2
Metalicity : 0.0
Absolute Magnitude: 5.0
Apparent Magnitude: 10.0
Right Ascension(RA) 26.2083
Declination (DEC) -18.4008
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-266 c
TOI-266 c

  • TOI-266 c is an exoplanet orbiting the star TOI-266, located about 331.7 light-years (101.7 pc) away from Solar System. Its discovery was publicly announced on 2019.
  • The host star TOI-266 has apparent magnitude of 10.0, with absolute magnitude of 5.0.
  • It is 1.0 times more massive and 0.9 times bigger compared with our Sun. The surface temperature is 5784 with its spectral types of G2
  • In this planetary system, the extrasolar planet TOI-266 c orbits around the star TOI-266 every 19.6 days with its orbital distance of 0.14 AU ( 21567114.1 km)
  • (Projected orbit of TOI-266 c around its host star TOI-266)


  • The Star TOI-266 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.667 AU ( 99747612.3 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.922 AU ( 137877267.3 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.404 AU ( 210094443.2 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.067 AU ( 309163176.8 km)
  • Radiation at Planetary Boundary of TOI-266 c : 55893.38 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star TOI-266)



  • Kopparapu Recent Venus for Star TOI-266 distance : 0.691 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star TOI-266 distance : 0.875 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star TOI-266 distance : 0.845 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star TOI-266 distance : 0.926 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI-266 distance : 1.545 AU
  • Kopparapu Outer Boundary for Early Mars for Star TOI-266 distance : 1.629 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star TOI-266)



  • Original Kopparapu Recent Venus for Star TOI-266 distance : 0.692 AU
  • Original Kopparapu Runaway Greenhouse for Star TOI-266 distance : 0.899 AU
  • Original Kopparapu Moist Greenhouse for Star TOI-266 distance : 0.915 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI-266 distance : 1.572 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star TOI-266 distance : 1.635 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star TOI-266)



    (Position in Stellar Map of star TOI-266 and its Exoplanet TOI-266 c)



    (Zoomed position in Stellar Map of star TOI-266 and its Exoplanet TOI-266 c (zoom level 3))

    (Synthetic Spectrum of star TOI-266*)
    *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