Imaginary Picture of Teegarden's b
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Exoplanet Name : Teegarden's b
Alternate Name : GAT 1370 b
Radius (Rjup / Re): 0.0907 (Rjup) 1.0161 (Rearth)
Mass (Mjup / Me): 0.0033 (Mjup) 1.0492 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0252 (AU) 0.0252 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0134
Orbital Period(Observed/Estimated) 4.91 (Days Obs.) 4.90 (Days Est.)
Star Radiation at Atmospheric Boundary: 1563.7 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 280.7 (K)
Blackbody T 0.3(K) 263.6 (K)
Blackbody T 0.7(K) 213.3 (K)
Tidally Locked Blackbody T 0.1(K) 333.8 (K)
Tidally Locked Blackbody T 0.3(K) 313.4 (K)
Size Class: Earth-size
Mass Class:
Detection Type : Radial Velocity
Mass Detection : Radial Velocity
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Habitable
Habitability by Kopparapu: Habitable
Star Name : Teegarden's
Alternate Name : GAT 1370
Star Distance(LY) : 12.5
Stellar Radius(Rsun) : 0.1 (Rsun Measured)
Stellar Mass(Msun) : 0.1 (Msun Measured) 0.1 (Msun Estimated)
Star Age : 8.0 (GY)
Temperature : 2900 (K)
Spectral type : M7.0V
Metalicity : -0.2
Absolute Magnitude: 24.1
Apparent Magnitude: 22.0
Right Ascension(RA) 43.2542
Declination (DEC) 16.8814
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
Teegarden's b
Teegarden's b

  • Teegarden's b is an exoplanet orbiting the star Teegarden's, located about 12.5 light-years ( 3.8 pc) away from Solar System. Its discovery was publicly announced on 2019.
  • The host star Teegarden's has apparent magnitude of 22.0, with absolute magnitude of 24.1.
  • It is 0.1 times more massive and 0.1 times bigger compared with our Sun. The surface temperature is 2900 with its spectral types of M7.0V
  • In this planetary system, the extrasolar planet Teegarden's b orbits around the star Teegarden's every 4.9 days with its orbital distance of 0.03 AU ( 3769866.3 km)
  • (Projected orbit of Teegarden's b around its host star Teegarden's)


  • The Star Teegarden's 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.019 AU ( 2916338.2 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.027 AU ( 4031141.5 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.041 AU ( 6142567.6 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.060 AU ( 9039057.3 km)
  • Radiation at Planetary Boundary of Teegarden's b : 1563.74 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Teegarden's)



  • Kopparapu Recent Venus for Star Teegarden's distance : 0.022 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Teegarden's distance : 0.028 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Teegarden's distance : 0.027 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Teegarden's distance : 0.030 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Teegarden's distance : 0.056 AU
  • Kopparapu Outer Boundary for Early Mars for Star Teegarden's distance : 0.059 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Teegarden's)



  • Original Kopparapu Recent Venus for Star Teegarden's distance : 0.022 AU
  • Original Kopparapu Runaway Greenhouse for Star Teegarden's distance : 0.029 AU
  • Original Kopparapu Moist Greenhouse for Star Teegarden's distance : 0.029 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Teegarden's distance : 0.057 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Teegarden's distance : 0.059 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Teegarden's)



    (Position in Stellar Map of star Teegarden's and its Exoplanet Teegarden's b)



    (Zoomed position in Stellar Map of star Teegarden's and its Exoplanet Teegarden's b (zoom level 3))