Imaginary Picture of K2-163 b

Display orbital revolution of K2-163 b around the hoststar K2-163
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Exoplanet Name : K2-163 b
Alternate Name : "2MASS J12091905-0032204 b, EPIC 201427874 b, EPIC 201427874.01, WISE J120919.02-003221.2 b"
Status : Confirmed
Radius (Rjup / Re): 0.2200 (Rjup) 2.4660 (Rearth)
Mass (Mjup / Me): 0.0192 (Mjup) 6.1075 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.0652 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0183
Orbital Period(Observed/Estimated) 6.67 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 1.0043
Star Radiation at Atmospheric Boundary: 99018.1 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 791.7 (K)
Blackbody T 0.3(K) 743.5 (K)
Blackbody T 0.7(K) 601.6 (K)
Tidally Locked Blackbody T 0.1(K) 941.5 (K)
Tidally Locked Blackbody T 0.3(K) 884.2 (K)
Size Class: sub-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 : K2-163
Alternate Name : "2MASS J12091905-0032204, EPIC 201427874, WISE J120919.02-003221.2"
Star Distance(LY) : 648.3
Stellar Radius(Rsun) : 0.8 (Rsun Measured)
Stellar Mass(Msun) : 0.8 (Msun Measured) 0.8 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 4937 (K)
Spectral type : K2
UV portion[%]: 2.9
Visible portion[%]: 36.4
IR portion[%]: 60.6
Metalicity : 0.1
Absolute Magnitude: 4.8
Apparent Magnitude: 11.3
Right Ascension(RA) 182.3293
Declination (DEC) -0.5391
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=K2-163+&submit=SIMBAD+search
Open Exoplanet Database Link
K2-163 b
K2-163 b

  • K2-163 b is an exoplanet orbiting the star K2-163, located about 648.3 light-years (198.8 pc) away from Solar System. Its discovery was publicly announced on 2018.
  • The host star K2-163 has apparent magnitude of 11.3, with absolute magnitude of 4.8.
  • It is 0.8 times more massive and 0.8 times bigger compared with our Sun. The surface temperature is 4937 with its spectral types of K2
  • In this planetary system, the extrasolar planet K2-163 b orbits around the star K2-163 every 6.7 days with its orbital distance of 0.07 AU ( 9752376.4 km)
  • (Projected orbit of K2-163 b around its host star K2-163)


  • The Star K2-163 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.401 AU ( 60034093.8 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.555 AU ( 82982806.4 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.845 AU ( 126447432.8 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.244 AU ( 186072936.7 km)
  • Radiation at Planetary Boundary of K2-163 b : 99018.06 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star K2-163)



  • Kopparapu Recent Venus for Star K2-163 distance : 0.435 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star K2-163 distance : 0.551 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star K2-163 distance : 0.532 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star K2-163 distance : 0.584 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-163 distance : 1.002 AU
  • Kopparapu Outer Boundary for Early Mars for Star K2-163 distance : 1.057 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star K2-163)



  • Original Kopparapu Recent Venus for Star K2-163 distance : 0.431 AU
  • Original Kopparapu Runaway Greenhouse for Star K2-163 distance : 0.568 AU
  • Original Kopparapu Moist Greenhouse for Star K2-163 distance : 0.570 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-163 distance : 1.018 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star K2-163 distance : 1.059 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star K2-163)



    (Position in Stellar Map of star K2-163 and its Exoplanet K2-163 b)



    (Zoomed position in Stellar Map of star K2-163 and its Exoplanet K2-163 b (zoom level 3))

    (Synthetic Spectrum of star K2-163*)
    *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