Imaginary Picture of TOI-1439 b

Display orbital revolution of TOI-1439 b around the hoststar TOI-1439
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Exoplanet Name : TOI-1439 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.3256 (Rjup) 3.6497 (Rearth)
Mass (Mjup / Me): 0.1211 (Mjup) 38.5023 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.1920 (AU) 0.1920 (AU Est.)
Eccentricity : 0.1600
Orbital Period(Yrs) 0.0757
Orbital Period(Observed/Estimated) 27.64 (Days Obs.) 30.73 (Days Est.)
Surface Gravity (G Earth) 2.8906
Star Radiation at Atmospheric Boundary: 103865.8 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 801.2 (K)
Blackbody T 0.3(K) 752.4 (K)
Blackbody T 0.7(K) 608.8 (K)
Tidally Locked Blackbody T 0.1(K) 952.8 (K)
Tidally Locked Blackbody T 0.3(K) 894.8 (K)
Size Class: 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-1439
Alternate Name :
Star Distance(LY) : 751.1
Stellar Radius(Rsun) : 1.6 (Rsun Measured)
Stellar Mass(Msun) : 1.0 (Msun Measured) 1.2 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5873 (K)
Spectral type : G1
UV portion[%]: 0.3
Visible portion[%]: 1.5
IR portion[%]: 98.2
Metalicity : 0.0
Absolute Magnitude: 15.2
Apparent Magnitude: 22.0
Right Ascension(RA) 241.7637
Declination (DEC) 67.8776
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-1439 b
TOI-1439 b

  • TOI-1439 b is an exoplanet orbiting the star TOI-1439, located about 751.1 light-years (230.3 pc) away from Solar System. Its discovery was publicly announced on 2024.
  • The host star TOI-1439 has apparent magnitude of 22.0, with absolute magnitude of 15.2.
  • It is 1.0 times more massive and 1.6 times bigger compared with our Sun. The surface temperature is 5873 with its spectral types of G1
  • In this planetary system, the extrasolar planet TOI-1439 b orbits around the star TOI-1439 every 27.6 days with its orbital distance of 0.19 AU ( 28722791.2 km)
  • (Projected orbit of TOI-1439 b around its host star TOI-1439)


  • The Star TOI-1439 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.211 AU ( 181089441.2 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.673 AU ( 250312932.1 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.550 AU ( 381421514.4 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 3.752 AU ( 561278467.5 km)
  • Radiation at Planetary Boundary of TOI-1439 b : 103865.76 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star TOI-1439)



  • Kopparapu Recent Venus for Star TOI-1439 distance : 1.247 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star TOI-1439 distance : 1.580 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star TOI-1439 distance : 1.526 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star TOI-1439 distance : 1.673 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI-1439 distance : 2.783 AU
  • Kopparapu Outer Boundary for Early Mars for Star TOI-1439 distance : 2.935 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star TOI-1439)



  • Original Kopparapu Recent Venus for Star TOI-1439 distance : 1.251 AU
  • Original Kopparapu Runaway Greenhouse for Star TOI-1439 distance : 1.623 AU
  • Original Kopparapu Moist Greenhouse for Star TOI-1439 distance : 1.656 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI-1439 distance : 2.832 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star TOI-1439 distance : 2.945 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star TOI-1439)



    (Position in Stellar Map of star TOI-1439 and its Exoplanet TOI-1439 b)



    (Zoomed position in Stellar Map of star TOI-1439 and its Exoplanet TOI-1439 b (zoom level 3))

    (Synthetic Spectrum of star TOI-1439*)
    *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