Imaginary Picture of K2-227 b

Display orbital revolution of K2-227 b around the hoststar K2-227
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Exoplanet Name : K2-227 b
Alternate Name : "2MASS J12434764-0828416 b, EPIC 228760097 b, EPIC 228760097.01, TYC 5528-456-1 b, WISE J124347.62-082842.1 b"
Status : Confirmed
Radius (Rjup / Re): 0.1490 (Rjup) 1.6701 (Rearth)
Mass (Mjup / Me): 0.0134 (Mjup) 4.2508 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.1097 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0373
Orbital Period(Observed/Estimated) 13.62 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 1.5239
Star Radiation at Atmospheric Boundary: 83552.6 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 758.8 (K)
Blackbody T 0.3(K) 712.6 (K)
Blackbody T 0.7(K) 576.6 (K)
Tidally Locked Blackbody T 0.1(K) 902.4 (K)
Tidally Locked Blackbody T 0.3(K) 847.4 (K)
Size Class: super-Earth-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 : K2-227
Alternate Name : "2MASS J12434764-0828416, EPIC 228760097, TYC 5528-456-1, WISE J124347.62-082842.1"
Star Distance(LY) : 613.9
Stellar Radius(Rsun) : 0.9 (Rsun Measured)
Stellar Mass(Msun) : 0.9 (Msun Measured) 1.0 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5673 (K)
Spectral type : G5
UV portion[%]: 7.5
Visible portion[%]: 44.3
IR portion[%]: 48.2
Metalicity : -0.1
Absolute Magnitude: 4.0
Apparent Magnitude: 10.4
Right Ascension(RA) 190.9485
Declination (DEC) -8.4782
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
K2-227 b
K2-227 b

  • K2-227 b is an exoplanet orbiting the star K2-227, located about 613.9 light-years (188.2 pc) away from Solar System. Its discovery was publicly announced on 2018.
  • The host star K2-227 has apparent magnitude of 10.4, with absolute magnitude of 4.0.
  • It is 0.9 times more massive and 0.9 times bigger compared with our Sun. The surface temperature is 5673 with its spectral types of G5
  • In this planetary system, the extrasolar planet K2-227 b orbits around the star K2-227 every 13.6 days with its orbital distance of 0.11 AU ( 16415853.9 km)
  • (Projected orbit of K2-227 b around its host star K2-227)


  • The Star K2-227 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.621 AU ( 92826865.6 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.858 AU ( 128310986.8 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.307 AU ( 195517548.7 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.923 AU ( 287712638.0 km)
  • Radiation at Planetary Boundary of K2-227 b : 83552.57 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star K2-227)



  • Kopparapu Recent Venus for Star K2-227 distance : 0.647 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star K2-227 distance : 0.820 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star K2-227 distance : 0.792 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star K2-227 distance : 0.868 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-227 distance : 1.451 AU
  • Kopparapu Outer Boundary for Early Mars for Star K2-227 distance : 1.531 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star K2-227)



  • Original Kopparapu Recent Venus for Star K2-227 distance : 0.647 AU
  • Original Kopparapu Runaway Greenhouse for Star K2-227 distance : 0.842 AU
  • Original Kopparapu Moist Greenhouse for Star K2-227 distance : 0.856 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-227 distance : 1.477 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star K2-227 distance : 1.536 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star K2-227)



    (Position in Stellar Map of star K2-227 and its Exoplanet K2-227 b)



    (Zoomed position in Stellar Map of star K2-227 and its Exoplanet K2-227 b (zoom level 3))

    (Synthetic Spectrum of star K2-227*)
    *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