Imaginary Picture of TOI-1801 b

Display orbital revolution of TOI-1801 b around the hoststar TOI-1801
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Exoplanet Name : TOI-1801 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.1865 (Rjup) 2.0905 (Rearth)
Mass (Mjup / Me): 0.0182 (Mjup) 5.7909 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0780 (AU) 0.0780 (AU Est.)
Eccentricity : 0.0740
Orbital Period(Yrs) 0.0291
Orbital Period(Observed/Estimated) 10.64 (Days Obs.) 10.83 (Days Est.)
Surface Gravity (G Earth) 1.3251
Star Radiation at Atmospheric Boundary: 12915.7 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 475.8 (K)
Blackbody T 0.3(K) 446.8 (K)
Blackbody T 0.7(K) 361.5 (K)
Tidally Locked Blackbody T 0.1(K) 565.8 (K)
Tidally Locked Blackbody T 0.3(K) 531.4 (K)
Size Class: sub-Neptune-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-1801
Alternate Name :
Star Distance(LY) : 100.1
Stellar Radius(Rsun) : 0.6 (Rsun Measured)
Stellar Mass(Msun) : 0.5 (Msun Measured) 0.6 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 3815 (K)
Spectral type : M0.5
UV portion[%]: 0.4
Visible portion[%]: 19.3
IR portion[%]: 80.3
Metalicity : 0.0
Absolute Magnitude: 9.2
Apparent Magnitude: 11.6
Right Ascension(RA) 175.5750
Declination (DEC) 23.0269
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-1801 b
TOI-1801 b

  • TOI-1801 b is an exoplanet orbiting the star TOI-1801, located about 100.1 light-years (30.7 pc) away from Solar System. Its discovery was publicly announced on 2019.
  • The host star TOI-1801 has apparent magnitude of 11.6, with absolute magnitude of 9.2.
  • It is 0.5 times more massive and 0.6 times bigger compared with our Sun. The surface temperature is 3815 with its spectral types of M0.5
  • In this planetary system, the extrasolar planet TOI-1801 b orbits around the star TOI-1801 every 10.6 days with its orbital distance of 0.08 AU ( 11668633.9 km)
  • (Projected orbit of TOI-1801 b around its host star TOI-1801)


  • The Star TOI-1801 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.173 AU ( 25942384.2 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.240 AU ( 35859154.5 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.365 AU ( 54641415.8 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.537 AU ( 80407237.1 km)
  • Radiation at Planetary Boundary of TOI-1801 b : 12915.74 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star TOI-1801)



  • Kopparapu Recent Venus for Star TOI-1801 distance : 0.195 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star TOI-1801 distance : 0.247 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star TOI-1801 distance : 0.238 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star TOI-1801 distance : 0.262 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI-1801 distance : 0.473 AU
  • Kopparapu Outer Boundary for Early Mars for Star TOI-1801 distance : 0.499 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star TOI-1801)



  • Original Kopparapu Recent Venus for Star TOI-1801 distance : 0.193 AU
  • Original Kopparapu Runaway Greenhouse for Star TOI-1801 distance : 0.255 AU
  • Original Kopparapu Moist Greenhouse for Star TOI-1801 distance : 0.255 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI-1801 distance : 0.480 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star TOI-1801 distance : 0.499 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star TOI-1801)



    (Position in Stellar Map of star TOI-1801 and its Exoplanet TOI-1801 b)



    (Zoomed position in Stellar Map of star TOI-1801 and its Exoplanet TOI-1801 b (zoom level 3))

    (Synthetic Spectrum of star TOI-1801*)
    *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