Imaginary Picture of TOI-2180 b

Display orbital revolution of TOI-2180 b around the hoststar TOI-2180
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Exoplanet Name : TOI-2180 b
Alternate Name : HD 238894 b
Status : Confirmed
Radius (Rjup / Re): 1.0100 (Rjup) 11.3211 (Rearth)
Mass (Mjup / Me): 2.7550 (Mjup) 875.9192 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.8280 (AU) 0.8280 (AU Est.)
Eccentricity : 0.3680
Orbital Period(Yrs) 0.7123
Orbital Period(Observed/Estimated) 260.16 (Days Obs.) 261.08 (Days Est.)
Surface Gravity (G Earth) 6.8342
Star Radiation at Atmospheric Boundary: 5036.0 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 376.0 (K)
Blackbody T 0.3(K) 353.1 (K)
Blackbody T 0.7(K) 285.7 (K)
Tidally Locked Blackbody T 0.1(K) 447.1 (K)
Tidally Locked Blackbody T 0.3(K) 419.9 (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-2180
Alternate Name : HD 238894
Star Distance(LY) : 379.3
Stellar Radius(Rsun) : 1.6 (Rsun Measured)
Stellar Mass(Msun) : 1.1 (Msun Measured) 1.1 (Msun Estimated)
Star Age : 8.1 (GY)
Temperature : 5695 (K)
Spectral type : G4
UV portion[%]: 7.6
Visible portion[%]: 44.4
IR portion[%]: 48.0
Metalicity : 0.3
Absolute Magnitude: 3.9
Apparent Magnitude: 9.2
Right Ascension(RA) 277.9417
Declination (DEC) 56.6508
Hubble Space Telescope Guide Star Catalog (GSC) ID 03913-01781
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal
Discovery Paper - URL
SIMBAD LINK http://simbad.cds.unistra.fr/simbad/sim-basic?Ident=TOI-2180&submit=SIMBAD+search
Open Exoplanet Database Link
TOI-2180 b
TOI-2180 b

  • TOI-2180 b is an exoplanet orbiting the star TOI-2180, located about 379.3 light-years (116.3 pc) away from Solar System. Its discovery was publicly announced on 2022.
  • The host star TOI-2180 has apparent magnitude of 9.2, with absolute magnitude of 3.9.
  • It is 1.1 times more massive and 1.6 times bigger compared with our Sun. The surface temperature is 5695 with its spectral types of G4
  • In this planetary system, the extrasolar planet TOI-2180 b orbits around the star TOI-2180 every 260.2 days with its orbital distance of 0.83 AU ( 123867036.9 km)
  • (Projected orbit of TOI-2180 b around its host star TOI-2180)


  • The Star TOI-2180 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.149 AU ( 171960567.1 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.589 AU ( 237694442.4 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.421 AU ( 362193728.5 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 3.563 AU ( 532983938.2 km)
  • Radiation at Planetary Boundary of TOI-2180 b : 5036.00 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star TOI-2180)



  • Kopparapu Recent Venus for Star TOI-2180 distance : 1.197 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star TOI-2180 distance : 1.516 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star TOI-2180 distance : 1.464 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star TOI-2180 distance : 1.606 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI-2180 distance : 2.684 AU
  • Kopparapu Outer Boundary for Early Mars for Star TOI-2180 distance : 2.830 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star TOI-2180)



  • Original Kopparapu Recent Venus for Star TOI-2180 distance : 1.197 AU
  • Original Kopparapu Runaway Greenhouse for Star TOI-2180 distance : 1.558 AU
  • Original Kopparapu Moist Greenhouse for Star TOI-2180 distance : 1.584 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI-2180 distance : 2.730 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star TOI-2180 distance : 2.840 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star TOI-2180)



    (Position in Stellar Map of star TOI-2180 and its Exoplanet TOI-2180 b)



    (Zoomed position in Stellar Map of star TOI-2180 and its Exoplanet TOI-2180 b (zoom level 3))

    (Synthetic Spectrum of star TOI-2180*)
    *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