Imaginary Picture of 2MASS J1155-7919 b
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Exoplanet Name : 2MASS J1155-7919 b
Alternate Name :
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 10.0000 (Mjup) 3179.3800 (Mearth)
Semi Major Axis / Orbital Distance Calculated 582.0000 (AU) 582.0000 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0000
Orbital Period(Observed/Estimated) 0.00 (Days Obs.) 0.00 (Days Est.)
Star Radiation at Atmospheric Boundary: 0.0 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 4.6 (K)
Blackbody T 0.3(K) 4.3 (K)
Blackbody T 0.7(K) 3.5 (K)
Tidally Locked Blackbody T 0.1(K) 5.4 (K)
Tidally Locked Blackbody T 0.3(K) 5.1 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Imaging
Mass Detection : Spectrum
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : 2MASS J1155-7919
Alternate Name :
Star Distance(LY) : 329.9
Stellar Radius(Rsun) : 0.4 (Rsun Estimated)
Stellar Mass(Msun) : 0.0 (Msun Measured) 0.0 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 3500 (K)
Spectral type : M3
Metalicity : 0.0
Absolute Magnitude: 9.0
Apparent Magnitude: 14.0
Right Ascension(RA) 178.7690
Declination (DEC) -79.3200
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
2MASS J1155-7919 b
2MASS J1155-7919 b

  • 2MASS J1155-7919 b is an exoplanet orbiting the star 2MASS J1155-7919, located about 329.9 light-years (101.2 pc) away from Solar System. Its discovery was publicly announced on 2020.
  • The host star 2MASS J1155-7919 has apparent magnitude of 14.0, with absolute magnitude of 9.0.
  • (Projected orbit of 2MASS J1155-7919 b around its host star 2MASS J1155-7919)


  • The Star 2MASS J1155-7919 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.119 AU ( 17778498.1 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.164 AU ( 24574530.4 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.250 AU ( 37446146.1 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.368 AU ( 55103644.3 km)
  • Radiation at Planetary Boundary of 2MASS J1155-7919 b : 0.00 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star 2MASS J1155-7919)



  • Kopparapu Recent Venus for Star 2MASS J1155-7919 distance : 0.134 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star 2MASS J1155-7919 distance : 0.170 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star 2MASS J1155-7919 distance : 0.164 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star 2MASS J1155-7919 distance : 0.181 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star 2MASS J1155-7919 distance : 0.331 AU
  • Kopparapu Outer Boundary for Early Mars for Star 2MASS J1155-7919 distance : 0.349 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star 2MASS J1155-7919)



  • Original Kopparapu Recent Venus for Star 2MASS J1155-7919 distance : 0.133 AU
  • Original Kopparapu Runaway Greenhouse for Star 2MASS J1155-7919 distance : 0.176 AU
  • Original Kopparapu Moist Greenhouse for Star 2MASS J1155-7919 distance : 0.176 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star 2MASS J1155-7919 distance : 0.336 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star 2MASS J1155-7919 distance : 0.349 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star 2MASS J1155-7919)



    (Position in Stellar Map of star 2MASS J1155-7919 and its Exoplanet 2MASS J1155-7919 b)



    (Zoomed position in Stellar Map of star 2MASS J1155-7919 and its Exoplanet 2MASS J1155-7919 b (zoom level 3))