Imaginary Picture of K2-127 b

Display orbital revolution of K2-127 b around the hoststar K2-127
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Exoplanet Name : K2-127 b
Alternate Name : "EPIC 212554013 b, 2MASS J13481881-1135204 b, EPIC 212554013.01, WISE J134818.79-113520.3 b"
Radius (Rjup / Re): 0.7470 (Rjup) 8.3731 (Rearth)
Mass (Mjup / Me): 0.4086 (Mjup) 129.9072 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0411 (AU) 0.0411 (AU Est.)
Eccentricity : 0.1200
Orbital Period(Yrs) 0.0098
Orbital Period(Observed/Estimated) 3.59 (Days Obs.) 3.59 (Days Est.)
Surface Gravity (G Earth) 1.8529
Star Radiation at Atmospheric Boundary: 138539.4 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 861.1 (K)
Blackbody T 0.3(K) 808.6 (K)
Blackbody T 0.7(K) 654.3 (K)
Tidally Locked Blackbody T 0.1(K) 1024.0 (K)
Tidally Locked Blackbody T 0.3(K) 961.6 (K)
Size Class: Jupiter-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 : K2-127
Alternate Name : "EPIC 212554013, 2MASS J13481881-1135204, WISE J134818.79-113520.3"
Star Distance(LY) : 2362.6
Stellar Radius(Rsun) : 0.7 (Rsun Measured)
Stellar Mass(Msun) : 0.7 (Msun Measured) 0.7 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 4575 (K)
Spectral type : K3V
UV portion[%]: 1.8
Visible portion[%]: 32.3
IR portion[%]: 65.9
Metalicity : -0.1
Absolute Magnitude: 4.1
Apparent Magnitude: 13.4
Right Ascension(RA) 207.0784
Declination (DEC) -11.5890
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=K2-127+&submit=SIMBAD+search
Open Exoplanet Database Link
K2-127 b
K2-127 b

  • K2-127 b is an exoplanet orbiting the star K2-127, located about 2362.6 light-years (724.4 pc) away from Solar System. Its discovery was publicly announced on 2017.
  • The host star K2-127 has apparent magnitude of 13.4, with absolute magnitude of 4.1.
  • It is 0.7 times more massive and 0.7 times bigger compared with our Sun. The surface temperature is 4575 with its spectral types of K3V
  • In this planetary system, the extrasolar planet K2-127 b orbits around the star K2-127 every 3.6 days with its orbital distance of 0.04 AU ( 6148472.5 km)
  • (Projected orbit of K2-127 b around its host star K2-127)


  • The Star K2-127 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.299 AU ( 44769706.2 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.414 AU ( 61883433.8 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.630 AU ( 94296658.3 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.928 AU ( 138761663.5 km)
  • Radiation at Planetary Boundary of K2-127 b : 138539.44 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star K2-127)



  • Kopparapu Recent Venus for Star K2-127 distance : 0.330 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star K2-127 distance : 0.417 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star K2-127 distance : 0.403 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star K2-127 distance : 0.443 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-127 distance : 0.770 AU
  • Kopparapu Outer Boundary for Early Mars for Star K2-127 distance : 0.813 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star K2-127)



  • Original Kopparapu Recent Venus for Star K2-127 distance : 0.325 AU
  • Original Kopparapu Runaway Greenhouse for Star K2-127 distance : 0.431 AU
  • Original Kopparapu Moist Greenhouse for Star K2-127 distance : 0.430 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-127 distance : 0.783 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star K2-127 distance : 0.814 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star K2-127)



    (Position in Stellar Map of star K2-127 and its Exoplanet K2-127 b)



    (Zoomed position in Stellar Map of star K2-127 and its Exoplanet K2-127 b (zoom level 3))

    (Synthetic Spectrum of star K2-127*)
    *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