Imaginary Picture of TOI-270 d

Display orbital revolution of TOI-270 d around the hoststar TOI-270
/
Exoplanet Name : TOI-270 d
Alternate Name :
Radius (Rjup / Re): 0.1900 (Rjup) 2.1297 (Rearth)
Mass (Mjup / Me): 0.0170 (Mjup) 5.4049 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0733 (AU) 0.0733 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0312
Orbital Period(Observed/Estimated) 11.38 (Days Obs.) 11.46 (Days Est.)
Surface Gravity (G Earth) 1.1917
Star Radiation at Atmospheric Boundary: 4332.2 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 362.1 (K)
Blackbody T 0.3(K) 340.0 (K)
Blackbody T 0.7(K) 275.1 (K)
Tidally Locked Blackbody T 0.1(K) 430.6 (K)
Tidally Locked Blackbody T 0.3(K) 404.4 (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-270
Alternate Name :
Star Distance(LY) : 73.2
Stellar Radius(Rsun) : 0.4 (Rsun Measured)
Stellar Mass(Msun) : 0.4 (Msun Measured) 0.4 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 3386 (K)
Spectral type : M3.0V
UV portion[%]: 0.3
Visible portion[%]: 12.2
IR portion[%]: 87.5
Metalicity : -0.2
Absolute Magnitude: 10.8
Apparent Magnitude: 12.6
Right Ascension(RA) 68.4167
Declination (DEC) -51.9561
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-270 d
TOI-270 d

  • TOI-270 d is an exoplanet orbiting the star TOI-270, located about 73.2 light-years (22.5 pc) away from Solar System. Its discovery was publicly announced on 2019.
  • The host star TOI-270 has apparent magnitude of 12.6, with absolute magnitude of 10.8.
  • It is 0.4 times more massive and 0.4 times bigger compared with our Sun. The surface temperature is 3386 with its spectral types of M3.0V
  • In this planetary system, the extrasolar planet TOI-270 d orbits around the star TOI-270 every 11.4 days with its orbital distance of 0.07 AU ( 10965523.9 km)
  • (Projected orbit of TOI-270 d around its host star TOI-270)


  • The Star TOI-270 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.094 AU ( 14119379.7 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.130 AU ( 19516672.5 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.199 AU ( 29739089.9 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.293 AU ( 43762373.6 km)
  • Radiation at Planetary Boundary of TOI-270 d : 4332.23 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star TOI-270)



  • Kopparapu Recent Venus for Star TOI-270 distance : 0.107 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star TOI-270 distance : 0.135 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star TOI-270 distance : 0.130 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star TOI-270 distance : 0.144 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI-270 distance : 0.264 AU
  • Kopparapu Outer Boundary for Early Mars for Star TOI-270 distance : 0.279 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star TOI-270)



  • Original Kopparapu Recent Venus for Star TOI-270 distance : 0.106 AU
  • Original Kopparapu Runaway Greenhouse for Star TOI-270 distance : 0.140 AU
  • Original Kopparapu Moist Greenhouse for Star TOI-270 distance : 0.140 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI-270 distance : 0.269 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star TOI-270 distance : 0.279 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star TOI-270)



    (Position in Stellar Map of star TOI-270 and its Exoplanet TOI-270 d)



    (Zoomed position in Stellar Map of star TOI-270 and its Exoplanet TOI-270 d (zoom level 3))

    (Synthetic Spectrum of star TOI-270*)
    *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