Imaginary Picture of TOI-199 b

Display orbital revolution of TOI-199 b around the hoststar TOI-199
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Exoplanet Name : TOI-199 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.8100 (Rjup) 9.0793 (Rearth)
Mass (Mjup / Me): 0.1700 (Mjup) 54.0495 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.4800 (AU) 0.4800 (AU Est.)
Eccentricity : 0.0900
Orbital Period(Yrs) 0.2871
Orbital Period(Observed/Estimated) 104.87 (Days Obs.) 125.55 (Days Est.)
Surface Gravity (G Earth) 0.6557
Star Radiation at Atmospheric Boundary: 2729.2 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 322.6 (K)
Blackbody T 0.3(K) 302.9 (K)
Blackbody T 0.7(K) 245.1 (K)
Tidally Locked Blackbody T 0.1(K) 383.6 (K)
Tidally Locked Blackbody T 0.3(K) 360.3 (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-199
Alternate Name :
Star Distance(LY) : 331.7
Stellar Radius(Rsun) : 0.8 (Rsun Measured)
Stellar Mass(Msun) : 0.9 (Msun Measured) 1.3 (Msun Estimated)
Star Age : 0.8 (GY)
Temperature : 5255 (K)
Spectral type : G9V
UV portion[%]: 5.5
Visible portion[%]: 40.9
IR portion[%]: 53.6
Metalicity : 0.2
Absolute Magnitude: 5.7
Apparent Magnitude: 10.7
Right Ascension(RA) 80.1042
Declination (DEC) -59.8956
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-199 b
TOI-199 b

  • TOI-199 b is an exoplanet orbiting the star TOI-199, located about 331.7 light-years (101.7 pc) away from Solar System. Its discovery was publicly announced on 2023.
  • The host star TOI-199 has apparent magnitude of 10.7, with absolute magnitude of 5.7.
  • It is 0.9 times more massive and 0.8 times bigger compared with our Sun. The surface temperature is 5255 with its spectral types of G9V
  • In this planetary system, the extrasolar planet TOI-199 b orbits around the star TOI-199 every 104.9 days with its orbital distance of 0.48 AU ( 71806977.9 km)
  • (Projected orbit of TOI-199 b around its host star TOI-199)


  • The Star TOI-199 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.491 AU ( 73386707.9 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.678 AU ( 101439608.5 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.033 AU ( 154571514.8 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.520 AU ( 227458755.4 km)
  • Radiation at Planetary Boundary of TOI-199 b : 2729.23 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star TOI-199)



  • Kopparapu Recent Venus for Star TOI-199 distance : 0.524 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star TOI-199 distance : 0.663 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star TOI-199 distance : 0.641 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star TOI-199 distance : 0.703 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI-199 distance : 1.191 AU
  • Kopparapu Outer Boundary for Early Mars for Star TOI-199 distance : 1.256 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star TOI-199)



  • Original Kopparapu Recent Venus for Star TOI-199 distance : 0.520 AU
  • Original Kopparapu Runaway Greenhouse for Star TOI-199 distance : 0.683 AU
  • Original Kopparapu Moist Greenhouse for Star TOI-199 distance : 0.688 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI-199 distance : 1.211 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star TOI-199 distance : 1.259 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star TOI-199)



    (Position in Stellar Map of star TOI-199 and its Exoplanet TOI-199 b)



    (Zoomed position in Stellar Map of star TOI-199 and its Exoplanet TOI-199 b (zoom level 3))

    (Synthetic Spectrum of star TOI-199*)
    *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