Imaginary Picture of TOI-269 b

Display orbital revolution of TOI-269 b around the hoststar TOI-269
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Exoplanet Name : TOI-269 b
Alternate Name :
Radius (Rjup / Re): 0.2471 (Rjup) 2.7697 (Rearth)
Mass (Mjup / Me): 0.0277 (Mjup) 8.8069 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0345 (AU) 0.0345 (AU Est.)
Eccentricity : 0.4250
Orbital Period(Yrs) 0.0101
Orbital Period(Observed/Estimated) 3.70 (Days Obs.) 3.74 (Days Est.)
Surface Gravity (G Earth) 1.1480
Star Radiation at Atmospheric Boundary: 24885.1 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 560.6 (K)
Blackbody T 0.3(K) 526.4 (K)
Blackbody T 0.7(K) 425.9 (K)
Tidally Locked Blackbody T 0.1(K) 666.6 (K)
Tidally Locked Blackbody T 0.3(K) 626.0 (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-269
Alternate Name :
Star Distance(LY) : 186.0
Stellar Radius(Rsun) : 0.4 (Rsun Measured)
Stellar Mass(Msun) : 0.4 (Msun Measured) 0.4 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 3514 (K)
Spectral type : M2V
UV portion[%]: 0.3
Visible portion[%]: 14.8
IR portion[%]: 84.8
Metalicity : -0.3
Absolute Magnitude: 10.6
Apparent Magnitude: 14.4
Right Ascension(RA) 75.8458
Declination (DEC) -54.1778
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-269 b
TOI-269 b

  • TOI-269 b is an exoplanet orbiting the star TOI-269, located about 186.0 light-years (57.0 pc) away from Solar System. Its discovery was publicly announced on 2021.
  • The host star TOI-269 has apparent magnitude of 14.4, with absolute magnitude of 10.6.
  • It is 0.4 times more massive and 0.4 times bigger compared with our Sun. The surface temperature is 3514 with its spectral types of M2V
  • In this planetary system, the extrasolar planet TOI-269 b orbits around the star TOI-269 every 3.7 days with its orbital distance of 0.03 AU ( 5161126.5 km)
  • (Projected orbit of TOI-269 b around its host star TOI-269)


  • The Star TOI-269 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.106 AU ( 15927393.1 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.147 AU ( 22015819.6 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.224 AU ( 33547237.0 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.330 AU ( 49366228.8 km)
  • Radiation at Planetary Boundary of TOI-269 b : 24885.12 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star TOI-269)



  • Kopparapu Recent Venus for Star TOI-269 distance : 0.120 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star TOI-269 distance : 0.152 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star TOI-269 distance : 0.147 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star TOI-269 distance : 0.162 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI-269 distance : 0.296 AU
  • Kopparapu Outer Boundary for Early Mars for Star TOI-269 distance : 0.312 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star TOI-269)



  • Original Kopparapu Recent Venus for Star TOI-269 distance : 0.119 AU
  • Original Kopparapu Runaway Greenhouse for Star TOI-269 distance : 0.158 AU
  • Original Kopparapu Moist Greenhouse for Star TOI-269 distance : 0.158 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI-269 distance : 0.301 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star TOI-269 distance : 0.313 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star TOI-269)



    (Position in Stellar Map of star TOI-269 and its Exoplanet TOI-269 b)



    (Zoomed position in Stellar Map of star TOI-269 and its Exoplanet TOI-269 b (zoom level 3))

    (Synthetic Spectrum of star TOI-269*)
    *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