Imaginary Picture of TOI-1338 b

Display orbital revolution of TOI-1338 b around the hoststar TOI-1338
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Exoplanet Name : TOI-1338 b
Alternate Name : "BEBOP-1 b, EBLM J0608-59 b"
Status : Confirmed
Radius (Rjup / Re): 0.5986 (Rjup) 6.7097 (Rearth)
Mass (Mjup / Me): 0.0690 (Mjup) 21.9377 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.4607 (AU) 0.4607 (AU Est.)
Eccentricity : 0.0880
Orbital Period(Yrs) 0.2606
Orbital Period(Observed/Estimated) 95.17 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 0.4873
Star Radiation at Atmospheric Boundary: 59564.4 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 697.3 (K)
Blackbody T 0.3(K) 654.8 (K)
Blackbody T 0.7(K) 529.8 (K)
Tidally Locked Blackbody T 0.1(K) 829.2 (K)
Tidally Locked Blackbody T 0.3(K) 778.7 (K)
Size Class: sub-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-1338
Alternate Name : "EBLM J0608-69, BEBOP-1"
Star Distance(LY) : 1301.4
Stellar Radius(Rsun) : 3.1 (Rsun Measured)
Stellar Mass(Msun) : 0.0 (Msun Measured) 1.4 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5723 (K)
Spectral type : G4
UV portion[%]: 7.7
Visible portion[%]: 44.5
IR portion[%]: 47.8
Metalicity : -0.4
Absolute Magnitude: 3.5
Apparent Magnitude: 11.5
Right Ascension(RA) 92.1333
Declination (DEC) -59.5411
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal
Discovery Paper - URL
SIMBAD LINK https://simbad.u-strasbg.fr/simbad/sim-basic?Ident=TOI-1338&submit=SIMBAD+search
Open Exoplanet Database Link
TOI-1338 b
TOI-1338 b

  • TOI-1338 b is an exoplanet orbiting the star TOI-1338, located about 1301.4 light-years (399.0 pc) away from Solar System. Its discovery was publicly announced on 2020.
  • The host star TOI-1338 has apparent magnitude of 11.5, with absolute magnitude of 3.5.
  • In this planetary system, the extrasolar planet TOI-1338 b orbits around the star TOI-1338 every 95.2 days with its orbital distance of 0.46 AU ( 68919739.0 km)
  • (Projected orbit of TOI-1338 b around its host star TOI-1338)


  • The Star TOI-1338 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 2.200 AU ( 329054093.7 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 3.040 AU ( 454838749.6 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 4.633 AU ( 693073598.8 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 6.818 AU ( 1019888162.2 km)
  • Radiation at Planetary Boundary of TOI-1338 b : 59564.40 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star TOI-1338)



  • Kopparapu Recent Venus for Star TOI-1338 distance : 2.287 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star TOI-1338 distance : 2.896 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star TOI-1338 distance : 2.797 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star TOI-1338 distance : 3.067 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI-1338 distance : 5.122 AU
  • Kopparapu Outer Boundary for Early Mars for Star TOI-1338 distance : 5.403 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star TOI-1338)



  • Original Kopparapu Recent Venus for Star TOI-1338 distance : 2.288 AU
  • Original Kopparapu Runaway Greenhouse for Star TOI-1338 distance : 2.977 AU
  • Original Kopparapu Moist Greenhouse for Star TOI-1338 distance : 3.027 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI-1338 distance : 5.212 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star TOI-1338 distance : 5.420 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star TOI-1338)



    (Position in Stellar Map of star TOI-1338 and its Exoplanet TOI-1338 b)



    (Zoomed position in Stellar Map of star TOI-1338 and its Exoplanet TOI-1338 b (zoom level 3))

    (Synthetic Spectrum of star TOI-1338*)
    *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