Imaginary Picture of TOI-1806 b

Display orbital revolution of TOI-1806 b around the hoststar TOI-1806
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Exoplanet Name : TOI-1806 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.3030 (Rjup) 3.3963 (Rearth)
Mass (Mjup / Me): 0.0259 (Mjup) 8.2253 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0877 (AU) 0.0877 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0415
Orbital Period(Observed/Estimated) 15.15 (Days Obs.) 15.19 (Days Est.)
Surface Gravity (G Earth) 0.7131
Star Radiation at Atmospheric Boundary: 2924.0 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 328.2 (K)
Blackbody T 0.3(K) 308.2 (K)
Blackbody T 0.7(K) 249.4 (K)
Tidally Locked Blackbody T 0.1(K) 390.3 (K)
Tidally Locked Blackbody T 0.3(K) 366.5 (K)
Size Class: Neptune-size
Mass Class:
Detection Type : Primary Transit
Mass Detection :
Radius Detection : Primary Transit
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : TOI-1806
Alternate Name :
Star Distance(LY) : 181.1
Stellar Radius(Rsun) : 0.4 (Rsun Measured)
Stellar Mass(Msun) : 0.4 (Msun Measured) 0.4 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 3272 (K)
Spectral type : M6
UV portion[%]: 0.1
Visible portion[%]: 7.7
IR portion[%]: 92.2
Metalicity : 0.0
Absolute Magnitude: 11.5
Apparent Magnitude: 15.2
Right Ascension(RA) 166.1179
Declination (DEC) 30.4586
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-1806 b
TOI-1806 b

  • TOI-1806 b is an exoplanet orbiting the star TOI-1806, located about 181.1 light-years (55.5 pc) away from Solar System. Its discovery was publicly announced on 2024.
  • The host star TOI-1806 has apparent magnitude of 15.2, with absolute magnitude of 11.5.
  • It is 0.4 times more massive and 0.4 times bigger compared with our Sun. The surface temperature is 3272 with its spectral types of M6
  • In this planetary system, the extrasolar planet TOI-1806 b orbits around the star TOI-1806 every 15.1 days with its orbital distance of 0.09 AU ( 13119733.3 km)
  • (Projected orbit of TOI-1806 b around its host star TOI-1806)


  • The Star TOI-1806 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.093 AU ( 13878569.2 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.128 AU ( 19183809.5 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.195 AU ( 29231880.3 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.288 AU ( 43015992.4 km)
  • Radiation at Planetary Boundary of TOI-1806 b : 2924.01 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star TOI-1806)



  • Kopparapu Recent Venus for Star TOI-1806 distance : 0.105 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star TOI-1806 distance : 0.133 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star TOI-1806 distance : 0.128 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star TOI-1806 distance : 0.141 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI-1806 distance : 0.262 AU
  • Kopparapu Outer Boundary for Early Mars for Star TOI-1806 distance : 0.276 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star TOI-1806)



  • Original Kopparapu Recent Venus for Star TOI-1806 distance : 0.104 AU
  • Original Kopparapu Runaway Greenhouse for Star TOI-1806 distance : 0.138 AU
  • Original Kopparapu Moist Greenhouse for Star TOI-1806 distance : 0.138 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI-1806 distance : 0.266 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star TOI-1806 distance : 0.276 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star TOI-1806)



    (Position in Stellar Map of star TOI-1806 and its Exoplanet TOI-1806 b)



    (Zoomed position in Stellar Map of star TOI-1806 and its Exoplanet TOI-1806 b (zoom level 3))

    (Synthetic Spectrum of star TOI-1806*)
    *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