Imaginary Picture of TOI-263 b

Display orbital revolution of TOI-263 b around the hoststar TOI-263
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Exoplanet Name : TOI-263 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.9100 (Rjup) 10.2002 (Rearth)
Mass (Mjup / Me): 61.6000 (Mjup) 19584.9808 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0098 (AU) 0.0098 (AU Est.)
Eccentricity : 0.0170
Orbital Period(Yrs) 0.0015
Orbital Period(Observed/Estimated) 0.56 (Days Obs.) 0.56 (Days Est.)
Surface Gravity (G Earth) 188.2377
Star Radiation at Atmospheric Boundary: 233666.3 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 981.3 (K)
Blackbody T 0.3(K) 921.5 (K)
Blackbody T 0.7(K) 745.6 (K)
Tidally Locked Blackbody T 0.1(K) 1166.9 (K)
Tidally Locked Blackbody T 0.3(K) 1095.9 (K)
Size Class: Jupiter-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-263
Alternate Name : "TOI 263, TIC120916706"
Star Distance(LY) : 910.0
Stellar Radius(Rsun) : 0.4 (Rsun Measured)
Stellar Mass(Msun) : 0.4 (Msun Measured) 0.4 (Msun Estimated)
Star Age : 4.8 (GY)
Temperature : 3250 (K)
Spectral type : M3.5V
UV portion[%]: 0.2
Visible portion[%]: 9.1
IR portion[%]: 90.7
Metalicity : 0.0
Absolute Magnitude: 14.8
Apparent Magnitude: 22.0
Right Ascension(RA) 37.1083
Declination (DEC) -25.0973
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-263 b
TOI-263 b

  • TOI-263 b is an exoplanet orbiting the star TOI-263, located about 910.0 light-years (279.0 pc) away from Solar System. Its discovery was publicly announced on 2019.
  • The host star TOI-263 has apparent magnitude of 22.0, with absolute magnitude of 14.8.
  • It is 0.4 times more massive and 0.4 times bigger compared with our Sun. The surface temperature is 3250 with its spectral types of M3.5V
  • In this planetary system, the extrasolar planet TOI-263 b orbits around the star TOI-263 every 0.6 days with its orbital distance of 0.01 AU ( 1466059.1 km)
  • (Projected orbit of TOI-263 b around its host star TOI-263)


  • The Star TOI-263 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.093 AU ( 13863722.5 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.128 AU ( 19163287.6 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.195 AU ( 29200609.4 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.287 AU ( 42969975.9 km)
  • Radiation at Planetary Boundary of TOI-263 b : 233666.34 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star TOI-263)



  • Kopparapu Recent Venus for Star TOI-263 distance : 0.105 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star TOI-263 distance : 0.133 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star TOI-263 distance : 0.128 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star TOI-263 distance : 0.141 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI-263 distance : 0.262 AU
  • Kopparapu Outer Boundary for Early Mars for Star TOI-263 distance : 0.276 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star TOI-263)



  • Original Kopparapu Recent Venus for Star TOI-263 distance : 0.104 AU
  • Original Kopparapu Runaway Greenhouse for Star TOI-263 distance : 0.138 AU
  • Original Kopparapu Moist Greenhouse for Star TOI-263 distance : 0.138 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI-263 distance : 0.266 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star TOI-263 distance : 0.277 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star TOI-263)



    (Position in Stellar Map of star TOI-263 and its Exoplanet TOI-263 b)



    (Zoomed position in Stellar Map of star TOI-263 and its Exoplanet TOI-263 b (zoom level 3))

    (Synthetic Spectrum of star TOI-263*)
    *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