Imaginary Picture of TOI-1259A b

Display orbital revolution of TOI-1259A b around the hoststar TOI-1259A
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Exoplanet Name : TOI-1259A b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 1.0220 (Rjup) 11.4556 (Rearth)
Mass (Mjup / Me): 0.4410 (Mjup) 140.2107 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0407 (AU) 0.0407 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0095
Orbital Period(Observed/Estimated) 3.48 (Days Obs.) 3.64 (Days Est.)
Surface Gravity (G Earth) 1.0684
Star Radiation at Atmospheric Boundary: 210183.4 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 955.6 (K)
Blackbody T 0.3(K) 897.4 (K)
Blackbody T 0.7(K) 726.1 (K)
Tidally Locked Blackbody T 0.1(K) 1136.4 (K)
Tidally Locked Blackbody T 0.3(K) 1067.2 (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-1259A
Alternate Name :
Star Distance(LY) : 385.2
Stellar Radius(Rsun) : 0.7 (Rsun Measured)
Stellar Mass(Msun) : 0.7 (Msun Measured) 0.7 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 4775 (K)
Spectral type : K3
UV portion[%]: 2.4
Visible portion[%]: 35.2
IR portion[%]: 62.4
Metalicity : -0.5
Absolute Magnitude: 16.6
Apparent Magnitude: 22.0
Right Ascension(RA) 282.1000
Declination (DEC) 79.2561
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-1259A b
TOI-1259A b

  • TOI-1259A b is an exoplanet orbiting the star TOI-1259A, located about 385.2 light-years (118.1 pc) away from Solar System. Its discovery was publicly announced on 2021.
  • The host star TOI-1259A has apparent magnitude of 22.0, with absolute magnitude of 16.6.
  • It is 0.7 times more massive and 0.7 times bigger compared with our Sun. The surface temperature is 4775 with its spectral types of K3
  • In this planetary system, the extrasolar planet TOI-1259A b orbits around the star TOI-1259A every 3.5 days with its orbital distance of 0.04 AU ( 6088633.3 km)
  • (Projected orbit of TOI-1259A b around its host star TOI-1259A)


  • The Star TOI-1259A 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.365 AU ( 54607123.8 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.505 AU ( 75481315.7 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.769 AU ( 115016821.1 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.131 AU ( 169252290.8 km)
  • Radiation at Planetary Boundary of TOI-1259A b : 210183.38 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star TOI-1259A)



  • Kopparapu Recent Venus for Star TOI-1259A distance : 0.399 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star TOI-1259A distance : 0.505 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star TOI-1259A distance : 0.488 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star TOI-1259A distance : 0.535 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI-1259A distance : 0.924 AU
  • Kopparapu Outer Boundary for Early Mars for Star TOI-1259A distance : 0.975 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star TOI-1259A)



  • Original Kopparapu Recent Venus for Star TOI-1259A distance : 0.394 AU
  • Original Kopparapu Runaway Greenhouse for Star TOI-1259A distance : 0.521 AU
  • Original Kopparapu Moist Greenhouse for Star TOI-1259A distance : 0.521 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI-1259A distance : 0.939 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star TOI-1259A distance : 0.977 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star TOI-1259A)



    (Position in Stellar Map of star TOI-1259A and its Exoplanet TOI-1259A b)



    (Zoomed position in Stellar Map of star TOI-1259A and its Exoplanet TOI-1259A b (zoom level 3))

    (Synthetic Spectrum of star TOI-1259A*)
    *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