Imaginary Picture of K2-119 b

Display orbital revolution of K2-119 b around the hoststar K2-119
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Exoplanet Name : K2-119 b
Alternate Name : "EPIC 211770795 b, 2MASS J08480233+1654067 b, EPIC 211770795.01, WISE J084802.35+165406.4 b"
Status : Confirmed
Radius (Rjup / Re): 0.2260 (Rjup) 2.5332 (Rearth)
Mass (Mjup / Me): 0.0197 (Mjup) 6.2623 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0698 (AU) 0.0698 (AU Est.)
Eccentricity : 0.0700
Orbital Period(Yrs) 0.0212
Orbital Period(Observed/Estimated) 7.73 (Days Obs.) 7.73 (Days Est.)
Surface Gravity (G Earth) 0.9758
Star Radiation at Atmospheric Boundary: 64050.7 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 710.0 (K)
Blackbody T 0.3(K) 666.8 (K)
Blackbody T 0.7(K) 539.5 (K)
Tidally Locked Blackbody T 0.1(K) 844.4 (K)
Tidally Locked Blackbody T 0.3(K) 792.9 (K)
Size Class: sub-Neptune-size
Mass Class:
Detection Type : Primary Transit
Mass Detection :
Radius Detection : Primary Transit
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : K2-119
Alternate Name : "EPIC 211770795, 2MASS J08480233+1654067, WISE J084802.35+165406.4"
Star Distance(LY) : 1182.9
Stellar Radius(Rsun) : 0.7 (Rsun Measured)
Stellar Mass(Msun) : 0.8 (Msun Measured) 0.8 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 4740 (K)
Spectral type : K5V
UV portion[%]: 2.3
Visible portion[%]: 34.8
IR portion[%]: 63.0
Metalicity : -0.1
Absolute Magnitude: 5.0
Apparent Magnitude: 12.8
Right Ascension(RA) 132.0097
Declination (DEC) 16.9019
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=K2-119&submit=SIMBAD+search
Open Exoplanet Database Link
K2-119 b
K2-119 b

  • K2-119 b is an exoplanet orbiting the star K2-119, located about 1182.9 light-years (362.7 pc) away from Solar System. Its discovery was publicly announced on 2017.
  • The host star K2-119 has apparent magnitude of 12.8, with absolute magnitude of 5.0.
  • It is 0.8 times more massive and 0.7 times bigger compared with our Sun. The surface temperature is 4740 with its spectral types of K5V
  • In this planetary system, the extrasolar planet K2-119 b orbits around the star K2-119 every 7.7 days with its orbital distance of 0.07 AU ( 10441931.4 km)
  • (Projected orbit of K2-119 b around its host star K2-119)


  • The Star K2-119 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.346 AU ( 51697928.9 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.478 AU ( 71460048.0 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.728 AU ( 108889299.0 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.071 AU ( 160235373.6 km)
  • Radiation at Planetary Boundary of K2-119 b : 64050.72 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star K2-119)



  • Kopparapu Recent Venus for Star K2-119 distance : 0.378 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star K2-119 distance : 0.479 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star K2-119 distance : 0.462 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star K2-119 distance : 0.508 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-119 distance : 0.877 AU
  • Kopparapu Outer Boundary for Early Mars for Star K2-119 distance : 0.925 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star K2-119)



  • Original Kopparapu Recent Venus for Star K2-119 distance : 0.373 AU
  • Original Kopparapu Runaway Greenhouse for Star K2-119 distance : 0.494 AU
  • Original Kopparapu Moist Greenhouse for Star K2-119 distance : 0.494 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-119 distance : 0.892 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star K2-119 distance : 0.927 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star K2-119)



    (Position in Stellar Map of star K2-119 and its Exoplanet K2-119 b)



    (Zoomed position in Stellar Map of star K2-119 and its Exoplanet K2-119 b (zoom level 3))

    (Synthetic Spectrum of star K2-119*)
    *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