Imaginary Picture of GJ 1151 c

Display orbital revolution of GJ 1151 c around the hoststar GJ 1151
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Exoplanet Name : GJ 1151 c
Alternate Name : Gliese 1151 c
Status : Checking
Radius (Rjup / Re): 0.1142 (Rjup) 1.2799 (Rearth)
Mass (Mjup / Me): 0.0079 (Mjup) 2.5117 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0174 (AU) 0.0174 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0055
Orbital Period(Observed/Estimated) 2.02 (Days Obs.) 2.02 (Days Est.)
Surface Gravity (G Earth) 1.5334
Star Radiation at Atmospheric Boundary: 21776.2 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 542.2 (K)
Blackbody T 0.3(K) 509.2 (K)
Blackbody T 0.7(K) 412.0 (K)
Tidally Locked Blackbody T 0.1(K) 644.8 (K)
Tidally Locked Blackbody T 0.3(K) 605.5 (K)
Size Class: super-Earth-size
Mass Class:
Detection Type : Radial Velocity
Mass Detection : Radial Velocity
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : GJ 1151
Alternate Name :
Star Distance(LY) : 26.2
Stellar Radius(Rsun) : 0.2 (Rsun Measured)
Stellar Mass(Msun) : 0.2 (Msun Measured) 0.2 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 3400 (K)
Spectral type : M4.5
UV portion[%]: 0.3
Visible portion[%]: 12.1
IR portion[%]: 87.6
Metalicity : 0.0
Absolute Magnitude: 13.5
Apparent Magnitude: 13.0
Right Ascension(RA) 177.7417
Declination (DEC) 48.3775
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
GJ 1151 c
GJ 1151 c

  • GJ 1151 c is an exoplanet orbiting the star GJ 1151, located about 26.2 light-years ( 8.0 pc) away from Solar System. Its discovery was publicly announced on 2021.
  • The host star GJ 1151 has apparent magnitude of 13.0, with absolute magnitude of 13.5.
  • It is 0.2 times more massive and 0.2 times bigger compared with our Sun. The surface temperature is 3400 with its spectral types of M4.5
  • In this planetary system, the extrasolar planet GJ 1151 c orbits around the star GJ 1151 every 2.0 days with its orbital distance of 0.02 AU ( 2595523.1 km)
  • (Projected orbit of GJ 1151 c around its host star GJ 1151)


  • The Star GJ 1151 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.050 AU ( 7492831.1 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.069 AU ( 10357050.7 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.105 AU ( 15781853.2 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.155 AU ( 23223688.4 km)
  • Radiation at Planetary Boundary of GJ 1151 c : 21776.17 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star GJ 1151)



  • Kopparapu Recent Venus for Star GJ 1151 distance : 0.057 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star GJ 1151 distance : 0.072 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star GJ 1151 distance : 0.069 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star GJ 1151 distance : 0.076 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star GJ 1151 distance : 0.140 AU
  • Kopparapu Outer Boundary for Early Mars for Star GJ 1151 distance : 0.148 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star GJ 1151)



  • Original Kopparapu Recent Venus for Star GJ 1151 distance : 0.056 AU
  • Original Kopparapu Runaway Greenhouse for Star GJ 1151 distance : 0.074 AU
  • Original Kopparapu Moist Greenhouse for Star GJ 1151 distance : 0.074 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star GJ 1151 distance : 0.142 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star GJ 1151 distance : 0.148 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star GJ 1151)



    (Position in Stellar Map of star GJ 1151 and its Exoplanet GJ 1151 c)



    (Zoomed position in Stellar Map of star GJ 1151 and its Exoplanet GJ 1151 c (zoom level 3))

    (Synthetic Spectrum of star GJ 1151*)
    *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