Imaginary Picture of GJ 357 d
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Exoplanet Name : GJ 357 d
Alternate Name :
Radius (Rjup / Re): 0.1497 (Rjup) 1.6775 (Rearth)
Mass (Mjup / Me): 0.0227 (Mjup) 7.2172 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.2040 (AU) 0.2040 (AU Est.)
Eccentricity : 0.0330
Orbital Period(Yrs) 0.1525
Orbital Period(Observed/Estimated) 55.70 (Days Obs.) 57.55 (Days Est.)
Star Radiation at Atmospheric Boundary: 505.1 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 211.6 (K)
Blackbody T 0.3(K) 198.7 (K)
Blackbody T 0.7(K) 160.8 (K)
Tidally Locked Blackbody T 0.1(K) 251.6 (K)
Tidally Locked Blackbody T 0.3(K) 236.3 (K)
Size Class: super-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 : GJ 357
Alternate Name : "TOI 562, Gliese 357, L 678-39"
Star Distance(LY) : 30.8
Stellar Radius(Rsun) : 0.3 (Rsun Measured)
Stellar Mass(Msun) : 0.3 (Msun Measured) 0.4 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 3505 (K)
Spectral type : M2.5 V
Metalicity : -0.1
Absolute Magnitude: 22.1
Apparent Magnitude: 22.0
Right Ascension(RA) 144.0068
Declination (DEC) -21.6608
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal
Discovery Paper - URL
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=GJ+357+&submit=SIMBAD+search
Open Exoplanet Database Link
GJ 357 d
GJ 357 d

  • GJ 357 d is an exoplanet orbiting the star GJ 357, located about 30.8 light-years ( 9.4 pc) away from Solar System. Its discovery was publicly announced on 2019.
  • The host star GJ 357 has apparent magnitude of 22.0, with absolute magnitude of 22.1.
  • It is 0.3 times more massive and 0.3 times bigger compared with our Sun. The surface temperature is 3505 with its spectral types of M2.5 V
  • In this planetary system, the extrasolar planet GJ 357 d orbits around the star GJ 357 every 55.7 days with its orbital distance of 0.20 AU ( 30517965.6 km)
  • (Projected orbit of GJ 357 d around its host star GJ 357)


  • The Star GJ 357 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.090 AU ( 13417266.9 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.124 AU ( 18546169.2 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.189 AU ( 28260257.5 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.278 AU ( 41586207.0 km)
  • Radiation at Planetary Boundary of GJ 357 d : 505.08 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star GJ 357)



  • Kopparapu Recent Venus for Star GJ 357 distance : 0.101 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star GJ 357 distance : 0.128 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star GJ 357 distance : 0.124 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star GJ 357 distance : 0.136 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star GJ 357 distance : 0.249 AU
  • Kopparapu Outer Boundary for Early Mars for Star GJ 357 distance : 0.263 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star GJ 357)



  • Original Kopparapu Recent Venus for Star GJ 357 distance : 0.100 AU
  • Original Kopparapu Runaway Greenhouse for Star GJ 357 distance : 0.133 AU
  • Original Kopparapu Moist Greenhouse for Star GJ 357 distance : 0.133 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star GJ 357 distance : 0.253 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star GJ 357 distance : 0.264 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star GJ 357)



    (Position in Stellar Map of star GJ 357 and its Exoplanet GJ 357 d)



    (Zoomed position in Stellar Map of star GJ 357 and its Exoplanet GJ 357 d (zoom level 3))