Imaginary Picture of TOI-640 b

Display orbital revolution of TOI-640 b around the hoststar TOI-640
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Exoplanet Name : TOI-640 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 1.7710 (Rjup) 19.8511 (Rearth)
Mass (Mjup / Me): 0.8800 (Mjup) 279.7854 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0661 (AU) 0.0661 (AU Est.)
Eccentricity : 0.0500
Orbital Period(Yrs) 0.0137
Orbital Period(Observed/Estimated) 5.00 (Days Obs.) 5.01 (Days Est.)
Surface Gravity (G Earth) 0.7100
Star Radiation at Atmospheric Boundary: 2120099.6 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1703.1 (K)
Blackbody T 0.3(K) 1599.4 (K)
Blackbody T 0.7(K) 1294.1 (K)
Tidally Locked Blackbody T 0.1(K) 2025.3 (K)
Tidally Locked Blackbody T 0.3(K) 1902.0 (K)
Size Class: Super-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-640
Alternate Name :
Star Distance(LY) : 1115.1
Stellar Radius(Rsun) : 2.1 (Rsun Measured)
Stellar Mass(Msun) : 1.5 (Msun Measured) 1.5 (Msun Estimated)
Star Age : 2.0 (GY)
Temperature : 6460 (K)
Spectral type : F7
UV portion[%]: 7.8
Visible portion[%]: 44.8
IR portion[%]: 47.4
Metalicity : 0.2
Absolute Magnitude: 2.8
Apparent Magnitude: 10.5
Right Ascension(RA) 99.7333
Declination (DEC) -36.6461
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-640 b
TOI-640 b

  • TOI-640 b is an exoplanet orbiting the star TOI-640, located about 1115.1 light-years (341.9 pc) away from Solar System. Its discovery was publicly announced on 2021.
  • The host star TOI-640 has apparent magnitude of 10.5, with absolute magnitude of 2.8.
  • It is 1.5 times more massive and 2.1 times bigger compared with our Sun. The surface temperature is 6460 with its spectral types of F7
  • In this planetary system, the extrasolar planet TOI-640 b orbits around the star TOI-640 every 5.0 days with its orbital distance of 0.07 AU ( 9885427.3 km)
  • (Projected orbit of TOI-640 b around its host star TOI-640)


  • The Star TOI-640 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.882 AU ( 281581341.5 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 2.602 AU ( 389218999.9 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 3.965 AU ( 593083621.9 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 5.834 AU ( 872748531.0 km)
  • Radiation at Planetary Boundary of TOI-640 b : 2120099.60 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star TOI-640)



  • Kopparapu Recent Venus for Star TOI-640 distance : 1.872 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star TOI-640 distance : 2.371 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star TOI-640 distance : 2.290 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star TOI-640 distance : 2.509 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI-640 distance : 4.127 AU
  • Kopparapu Outer Boundary for Early Mars for Star TOI-640 distance : 4.353 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star TOI-640)



  • Original Kopparapu Recent Venus for Star TOI-640 distance : 1.902 AU
  • Original Kopparapu Runaway Greenhouse for Star TOI-640 distance : 2.431 AU
  • Original Kopparapu Moist Greenhouse for Star TOI-640 distance : 2.517 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI-640 distance : 4.202 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star TOI-640 distance : 4.370 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star TOI-640)



    (Position in Stellar Map of star TOI-640 and its Exoplanet TOI-640 b)



    (Zoomed position in Stellar Map of star TOI-640 and its Exoplanet TOI-640 b (zoom level 3))

    (Synthetic Spectrum of star TOI-640*)
    *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