Imaginary Picture of DS Tuc A b
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Exoplanet Name : DS Tuc A b
Alternate Name : "HD 222259 A b, TIC 4102214986 b"
Radius (Rjup / Re): 0.5085 (Rjup) 5.6998 (Rearth)
Mass (Mjup / Me): 0.0880 (Mjup) 27.9785 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0795 (AU) 0.0795 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0223
Orbital Period(Observed/Estimated) 8.14 (Days Obs.) 8.36 (Days Est.)
Star Radiation at Atmospheric Boundary: 144785.4 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 870.6 (K)
Blackbody T 0.3(K) 817.6 (K)
Blackbody T 0.7(K) 661.5 (K)
Tidally Locked Blackbody T 0.1(K) 1035.3 (K)
Tidally Locked Blackbody T 0.3(K) 972.3 (K)
Size Class: sub-Jupiter-size
Mass Class:
Detection Type : Primary Transit
Mass Detection : Theoretical
Radius Detection : Primary Transit
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : DS Tuc A
Alternate Name :
Star Distance(LY) : 143.9
Stellar Radius(Rsun) : 0.9 (Rsun Measured)
Stellar Mass(Msun) : 1.0 (Msun Measured) 1.0 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5597 (K)
Spectral type : G6V
Metalicity : -0.1
Absolute Magnitude: 5.8
Apparent Magnitude: 9.0
Right Ascension(RA) 354.9167
Declination (DEC) -69.1958
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
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SIMBAD LINK
Open Exoplanet Database Link
DS Tuc A b
DS Tuc A b

  • DS Tuc A b is an exoplanet orbiting the star DS Tuc A, located about 143.9 light-years (44.1 pc) away from Solar System. Its discovery was publicly announced on 2019.
  • The host star DS Tuc A has apparent magnitude of 9.0, with absolute magnitude of 5.8.
  • It is 1.0 times more massive and 0.9 times bigger compared with our Sun. The surface temperature is 5597 with its spectral types of G6V
  • In this planetary system, the extrasolar planet DS Tuc A b orbits around the star DS Tuc A every 8.1 days with its orbital distance of 0.08 AU ( 11893030.7 km)
  • (Projected orbit of DS Tuc A b around its host star DS Tuc A)


  • The Star DS Tuc A 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.592 AU ( 88528929.2 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.818 AU ( 122370115.5 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.246 AU ( 186464975.6 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.834 AU ( 274391380.1 km)
  • Radiation at Planetary Boundary of DS Tuc A b : 144785.39 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star DS Tuc A)



  • Kopparapu Recent Venus for Star DS Tuc A distance : 0.620 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star DS Tuc A distance : 0.785 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star DS Tuc A distance : 0.758 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star DS Tuc A distance : 0.831 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star DS Tuc A distance : 1.393 AU
  • Kopparapu Outer Boundary for Early Mars for Star DS Tuc A distance : 1.470 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star DS Tuc A)



  • Original Kopparapu Recent Venus for Star DS Tuc A distance : 0.619 AU
  • Original Kopparapu Runaway Greenhouse for Star DS Tuc A distance : 0.807 AU
  • Original Kopparapu Moist Greenhouse for Star DS Tuc A distance : 0.819 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star DS Tuc A distance : 1.418 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star DS Tuc A distance : 1.474 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star DS Tuc A)



    (Position in Stellar Map of star DS Tuc A and its Exoplanet DS Tuc A b)



    (Zoomed position in Stellar Map of star DS Tuc A and its Exoplanet DS Tuc A b (zoom level 3))