Imaginary Picture of LHS 1140 b
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Exoplanet Name : LHS 1140 b
Alternate Name :
Radius (Rjup / Re): 0.1280 (Rjup) 1.4348 (Rearth)
Mass (Mjup / Me): 0.0209 (Mjup) 6.6449 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0875 (AU) 0.0875 (AU Est.)
Eccentricity : 0.2900
Orbital Period(Yrs) 0.0677
Orbital Period(Observed/Estimated) 24.74 (Days Obs.) 24.74 (Days Est.)
Star Radiation at Atmospheric Boundary: 532.5 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 214.4 (K)
Blackbody T 0.3(K) 201.3 (K)
Blackbody T 0.7(K) 162.9 (K)
Tidally Locked Blackbody T 0.1(K) 255.0 (K)
Tidally Locked Blackbody T 0.3(K) 239.4 (K)
Size Class: super-Earth-size
Mass Class:
Detection Type : Primary Transit
Mass Detection : Radial Velocity
Radius Detection : Primary Transit
Habitability by Solar Eq. Astronomical Unit: Habitable
Habitability by Kopparapu: Habitable
Star Name : LHS 1140
Alternate Name :
Star Distance(LY) : 40.7
Stellar Radius(Rsun) : 0.2 (Rsun Measured)
Stellar Mass(Msun) : 0.1 (Msun Measured) 0.1 (Msun Estimated)
Star Age : 5.0 (GY)
Temperature : 3131 (K)
Spectral type : M4.5
Metalicity : -0.2
Absolute Magnitude: 13.7
Apparent Magnitude: 14.2
Right Ascension(RA) 11.2458
Declination (DEC) -15.2714
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
LHS 1140 b
LHS 1140 b

  • LHS 1140 b is an exoplanet orbiting the star LHS 1140, located about 40.7 light-years (12.5 pc) away from Solar System. Its discovery was publicly announced on 2017.
  • The host star LHS 1140 has apparent magnitude of 14.2, with absolute magnitude of 13.7.
  • It is 0.1 times more massive and 0.2 times bigger compared with our Sun. The surface temperature is 3131 with its spectral types of M4.5
  • In this planetary system, the extrasolar planet LHS 1140 b orbits around the star LHS 1140 every 24.7 days with its orbital distance of 0.09 AU ( 13089813.7 km)
  • (Projected orbit of LHS 1140 b around its host star LHS 1140)


  • The Star LHS 1140 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.040 AU ( 5909315.7 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.055 AU ( 8168218.6 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.083 AU ( 12446557.5 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.122 AU ( 18315654.6 km)
  • Radiation at Planetary Boundary of LHS 1140 b : 532.53 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star LHS 1140)



  • Kopparapu Recent Venus for Star LHS 1140 distance : 0.045 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star LHS 1140 distance : 0.057 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star LHS 1140 distance : 0.055 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star LHS 1140 distance : 0.060 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star LHS 1140 distance : 0.112 AU
  • Kopparapu Outer Boundary for Early Mars for Star LHS 1140 distance : 0.119 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star LHS 1140)



  • Original Kopparapu Recent Venus for Star LHS 1140 distance : 0.045 AU
  • Original Kopparapu Runaway Greenhouse for Star LHS 1140 distance : 0.059 AU
  • Original Kopparapu Moist Greenhouse for Star LHS 1140 distance : 0.059 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star LHS 1140 distance : 0.114 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star LHS 1140 distance : 0.119 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star LHS 1140)



    (Position in Stellar Map of star LHS 1140 and its Exoplanet LHS 1140 b)



    (Zoomed position in Stellar Map of star LHS 1140 and its Exoplanet LHS 1140 b (zoom level 3))