Imaginary Picture of TOI-1789 b

Display orbital revolution of TOI-1789 b around the hoststar TOI-1789
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Exoplanet Name : TOI-1789 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 1.4000 (Rjup) 15.6926 (Rearth)
Mass (Mjup / Me): 0.7000 (Mjup) 222.5566 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0487 (AU) 0.0487 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0088
Orbital Period(Observed/Estimated) 3.21 (Days Obs.) 3.21 (Days Est.)
Surface Gravity (G Earth) 0.9038
Star Radiation at Atmospheric Boundary: 3123906.1 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1876.4 (K)
Blackbody T 0.3(K) 1762.1 (K)
Blackbody T 0.7(K) 1425.7 (K)
Tidally Locked Blackbody T 0.1(K) 2231.4 (K)
Tidally Locked Blackbody T 0.3(K) 2095.5 (K)
Size Class: Super-Jupiter-size
Mass Class:
Detection Type : Primary Transit
Mass Detection : Radial Velocity
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : TOI-1789
Alternate Name :
Star Distance(LY) : 729.1
Stellar Radius(Rsun) : 2.2 (Rsun Measured)
Stellar Mass(Msun) : 1.5 (Msun Measured) 1.5 (Msun Estimated)
Star Age : 2.8 (GY)
Temperature : 5984 (K)
Spectral type : G1
UV portion[%]: 7.8
Visible portion[%]: 44.8
IR portion[%]: 47.4
Metalicity : 0.4
Absolute Magnitude: 3.0
Apparent Magnitude: 9.7
Right Ascension(RA) 142.7417
Declination (DEC) 26.5400
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-1789 b
TOI-1789 b

  • TOI-1789 b is an exoplanet orbiting the star TOI-1789, located about 729.1 light-years (223.6 pc) away from Solar System. Its discovery was publicly announced on 2021.
  • The host star TOI-1789 has apparent magnitude of 9.7, with absolute magnitude of 3.0.
  • It is 1.5 times more massive and 2.2 times bigger compared with our Sun. The surface temperature is 5984 with its spectral types of G1
  • In this planetary system, the extrasolar planet TOI-1789 b orbits around the star TOI-1789 every 3.2 days with its orbital distance of 0.05 AU ( 7289904.2 km)
  • (Projected orbit of TOI-1789 b around its host star TOI-1789)


  • The Star TOI-1789 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.685 AU ( 252058358.2 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 2.329 AU ( 348410521.7 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 3.549 AU ( 530900532.0 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 5.222 AU ( 781243390.2 km)
  • Radiation at Planetary Boundary of TOI-1789 b : 3123906.08 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star TOI-1789)



  • Kopparapu Recent Venus for Star TOI-1789 distance : 1.725 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star TOI-1789 distance : 2.184 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star TOI-1789 distance : 2.109 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star TOI-1789 distance : 2.312 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI-1789 distance : 3.837 AU
  • Kopparapu Outer Boundary for Early Mars for Star TOI-1789 distance : 4.047 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star TOI-1789)



  • Original Kopparapu Recent Venus for Star TOI-1789 distance : 1.734 AU
  • Original Kopparapu Runaway Greenhouse for Star TOI-1789 distance : 2.243 AU
  • Original Kopparapu Moist Greenhouse for Star TOI-1789 distance : 2.295 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI-1789 distance : 3.905 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star TOI-1789 distance : 4.061 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star TOI-1789)



    (Position in Stellar Map of star TOI-1789 and its Exoplanet TOI-1789 b)



    (Zoomed position in Stellar Map of star TOI-1789 and its Exoplanet TOI-1789 b (zoom level 3))

    (Synthetic Spectrum of star TOI-1789*)
    *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