Imaginary Picture of TOI-1899 b

Display orbital revolution of TOI-1899 b around the hoststar TOI-1899
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Exoplanet Name : TOI-1899 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.9900 (Rjup) 11.0969 (Rearth)
Mass (Mjup / Me): 0.6700 (Mjup) 213.0185 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.1525 (AU) 0.1525 (AU Est.)
Eccentricity : 0.0440
Orbital Period(Yrs) 0.0796
Orbital Period(Observed/Estimated) 29.09 (Days Obs.) 27.47 (Days Est.)
Surface Gravity (G Earth) 1.7299
Star Radiation at Atmospheric Boundary: 4228.8 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 359.9 (K)
Blackbody T 0.3(K) 338.0 (K)
Blackbody T 0.7(K) 273.5 (K)
Tidally Locked Blackbody T 0.1(K) 428.0 (K)
Tidally Locked Blackbody T 0.3(K) 401.9 (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-1899
Alternate Name :
Star Distance(LY) : 418.8
Stellar Radius(Rsun) : 0.6 (Rsun Measured)
Stellar Mass(Msun) : 0.6 (Msun Measured) 0.6 (Msun Estimated)
Star Age : 7.4 (GY)
Temperature : 3841 (K)
Spectral type : M0
UV portion[%]: 0.4
Visible portion[%]: 19.3
IR portion[%]: 80.2
Metalicity : 0.3
Absolute Magnitude: 9.5
Apparent Magnitude: 15.0
Right Ascension(RA) 299.4250
Declination (DEC) 40.1433
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-1899 b
TOI-1899 b

  • TOI-1899 b is an exoplanet orbiting the star TOI-1899, located about 418.8 light-years (128.4 pc) away from Solar System. Its discovery was publicly announced on 2020.
  • The host star TOI-1899 has apparent magnitude of 15.0, with absolute magnitude of 9.5.
  • It is 0.6 times more massive and 0.6 times bigger compared with our Sun. The surface temperature is 3841 with its spectral types of M0
  • In this planetary system, the extrasolar planet TOI-1899 b orbits around the star TOI-1899 every 29.1 days with its orbital distance of 0.15 AU ( 22813675.3 km)
  • (Projected orbit of TOI-1899 b around its host star TOI-1899)


  • The Star TOI-1899 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.194 AU ( 29022540.0 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.268 AU ( 40116734.7 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.409 AU ( 61129025.9 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.601 AU ( 89954039.5 km)
  • Radiation at Planetary Boundary of TOI-1899 b : 4228.83 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star TOI-1899)



  • Kopparapu Recent Venus for Star TOI-1899 distance : 0.218 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star TOI-1899 distance : 0.276 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star TOI-1899 distance : 0.267 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star TOI-1899 distance : 0.293 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI-1899 distance : 0.528 AU
  • Kopparapu Outer Boundary for Early Mars for Star TOI-1899 distance : 0.557 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star TOI-1899)



  • Original Kopparapu Recent Venus for Star TOI-1899 distance : 0.216 AU
  • Original Kopparapu Runaway Greenhouse for Star TOI-1899 distance : 0.285 AU
  • Original Kopparapu Moist Greenhouse for Star TOI-1899 distance : 0.285 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI-1899 distance : 0.536 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star TOI-1899 distance : 0.558 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star TOI-1899)



    (Position in Stellar Map of star TOI-1899 and its Exoplanet TOI-1899 b)



    (Zoomed position in Stellar Map of star TOI-1899 and its Exoplanet TOI-1899 b (zoom level 3))

    (Synthetic Spectrum of star TOI-1899*)
    *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