Imaginary Picture of K2-196 b

Display orbital revolution of K2-196 b around the hoststar K2-196
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Exoplanet Name : K2-196 b
Alternate Name : "2MASS J13214951-0828181 b, EPIC 212691422 b, EPIC 212691422.01, WISE J132149.50-082818.1 b"
Status : Confirmed
Radius (Rjup / Re): 0.3210 (Rjup) 3.5981 (Rearth)
Mass (Mjup / Me): 0.0273 (Mjup) 8.6788 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.2728 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.1323
Orbital Period(Observed/Estimated) 48.32 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 0.6704
Star Radiation at Atmospheric Boundary: 52178.7 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 674.6 (K)
Blackbody T 0.3(K) 633.5 (K)
Blackbody T 0.7(K) 512.5 (K)
Tidally Locked Blackbody T 0.1(K) 802.2 (K)
Tidally Locked Blackbody T 0.3(K) 753.3 (K)
Size Class: Neptune-size
Mass Class:
Detection Type : Primary Transit
Mass Detection :
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : K2-196
Alternate Name : "2MASS J13214951-0828181, EPIC 212691422, WISE J132149.50-082818.1"
Star Distance(LY) : 1937.7
Stellar Radius(Rsun) : 1.5 (Rsun Measured)
Stellar Mass(Msun) : 1.2 (Msun Measured) 1.2 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 6045 (K)
Spectral type : G0
UV portion[%]: 7.8
Visible portion[%]: 44.8
IR portion[%]: 47.4
Metalicity : 0.0
Absolute Magnitude: 2.1
Apparent Magnitude: 10.9
Right Ascension(RA) 200.4563
Declination (DEC) -8.4717
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
K2-196 b
K2-196 b

  • K2-196 b is an exoplanet orbiting the star K2-196, located about 1937.7 light-years (594.1 pc) away from Solar System. Its discovery was publicly announced on 2018.
  • The host star K2-196 has apparent magnitude of 10.9, with absolute magnitude of 2.1.
  • It is 1.2 times more massive and 1.5 times bigger compared with our Sun. The surface temperature is 6045 with its spectral types of G0
  • In this planetary system, the extrasolar planet K2-196 b orbits around the star K2-196 every 48.3 days with its orbital distance of 0.27 AU ( 40812622.9 km)
  • (Projected orbit of K2-196 b around its host star K2-196)


  • The Star K2-196 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.219 AU ( 182377577.9 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.685 AU ( 252093473.6 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.568 AU ( 384134665.6 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 3.779 AU ( 565270988.3 km)
  • Radiation at Planetary Boundary of K2-196 b : 52178.70 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star K2-196)



  • Kopparapu Recent Venus for Star K2-196 distance : 1.243 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star K2-196 distance : 1.574 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star K2-196 distance : 1.521 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star K2-196 distance : 1.667 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-196 distance : 2.762 AU
  • Kopparapu Outer Boundary for Early Mars for Star K2-196 distance : 2.913 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star K2-196)



  • Original Kopparapu Recent Venus for Star K2-196 distance : 1.252 AU
  • Original Kopparapu Runaway Greenhouse for Star K2-196 distance : 1.616 AU
  • Original Kopparapu Moist Greenhouse for Star K2-196 distance : 1.656 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-196 distance : 2.811 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star K2-196 distance : 2.924 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star K2-196)



    (Position in Stellar Map of star K2-196 and its Exoplanet K2-196 b)



    (Zoomed position in Stellar Map of star K2-196 and its Exoplanet K2-196 b (zoom level 3))

    (Synthetic Spectrum of star K2-196*)
    *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