Imaginary Picture of TOI-1173 A b

Display orbital revolution of TOI-1173 A b around the hoststar TOI-1173 A
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Exoplanet Name : TOI-1173 A b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.7230 (Rjup) 8.1041 (Rearth)
Mass (Mjup / Me): 0.0821 (Mjup) 26.1027 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0700 (AU) 0.0700 (AU Est.)
Eccentricity : 0.0300
Orbital Period(Yrs) 0.0193
Orbital Period(Observed/Estimated) 7.06 (Days Obs.) 7.09 (Days Est.)
Surface Gravity (G Earth) 0.3974
Star Radiation at Atmospheric Boundary: 177333.1 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 915.9 (K)
Blackbody T 0.3(K) 860.1 (K)
Blackbody T 0.7(K) 695.9 (K)
Tidally Locked Blackbody T 0.1(K) 1089.2 (K)
Tidally Locked Blackbody T 0.3(K) 1022.8 (K)
Size Class: sub-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-1173 A
Alternate Name :
Star Distance(LY) : 431.7
Stellar Radius(Rsun) : 0.9 (Rsun Measured)
Stellar Mass(Msun) : 0.9 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 8.7 (GY)
Temperature : 5350 (K)
Spectral type : G7
UV portion[%]: 6.1
Visible portion[%]: 42.0
IR portion[%]: 51.9
Metalicity : 0.1
Absolute Magnitude: 5.4
Apparent Magnitude: 11.0
Right Ascension(RA) 197.6831
Declination (DEC) 70.7680
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-1173 A b
TOI-1173 A b

  • TOI-1173 A b is an exoplanet orbiting the star TOI-1173 A, located about 431.7 light-years (132.3 pc) away from Solar System. Its discovery was publicly announced on 2024.
  • The host star TOI-1173 A has apparent magnitude of 11.0, with absolute magnitude of 5.4.
  • It is 0.9 times more massive and 0.9 times bigger compared with our Sun. The surface temperature is 5350 with its spectral types of G7
  • In this planetary system, the extrasolar planet TOI-1173 A b orbits around the star TOI-1173 A every 7.1 days with its orbital distance of 0.07 AU ( 10471850.9 km)
  • (Projected orbit of TOI-1173 A b around its host star TOI-1173 A)


  • The Star TOI-1173 A 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.577 AU ( 86267780.6 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.797 AU ( 119244617.2 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.215 AU ( 181702407.9 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.787 AU ( 267383053.1 km)
  • Radiation at Planetary Boundary of TOI-1173 A b : 177333.08 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star TOI-1173 A)



  • Kopparapu Recent Venus for Star TOI-1173 A distance : 0.613 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star TOI-1173 A distance : 0.776 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star TOI-1173 A distance : 0.749 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star TOI-1173 A distance : 0.822 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI-1173 A distance : 1.388 AU
  • Kopparapu Outer Boundary for Early Mars for Star TOI-1173 A distance : 1.464 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star TOI-1173 A)



  • Original Kopparapu Recent Venus for Star TOI-1173 A distance : 0.609 AU
  • Original Kopparapu Runaway Greenhouse for Star TOI-1173 A distance : 0.798 AU
  • Original Kopparapu Moist Greenhouse for Star TOI-1173 A distance : 0.806 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI-1173 A distance : 1.412 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star TOI-1173 A distance : 1.468 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star TOI-1173 A)



    (Position in Stellar Map of star TOI-1173 A and its Exoplanet TOI-1173 A b)



    (Zoomed position in Stellar Map of star TOI-1173 A and its Exoplanet TOI-1173 A b (zoom level 3))

    (Synthetic Spectrum of star TOI-1173 A*)
    *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