Imaginary Picture of K2-219 d

Display orbital revolution of K2-219 d around the hoststar K2-219
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Exoplanet Name : K2-219 d
Alternate Name : "2MASS J00512286+0852034 d, EPIC 220592745 d, EPIC 220592745.03, TYC 605-518-1 d, WISE J005122.86+085203.1 d"
Status : Confirmed
Radius (Rjup / Re): 0.2300 (Rjup) 2.5781 (Rearth)
Mass (Mjup / Me): 0.0200 (Mjup) 6.3653 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.0982 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0305
Orbital Period(Observed/Estimated) 11.14 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 0.9577
Star Radiation at Atmospheric Boundary: 197071.7 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 940.4 (K)
Blackbody T 0.3(K) 883.1 (K)
Blackbody T 0.7(K) 714.5 (K)
Tidally Locked Blackbody T 0.1(K) 1118.3 (K)
Tidally Locked Blackbody T 0.3(K) 1050.2 (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 : K2-219
Alternate Name : "2MASS J00512286+0852034, EPIC 220592745, TYC 605-518-1, WISE J005122.86+085203.1"
Star Distance(LY) : 1071.2
Stellar Radius(Rsun) : 1.2 (Rsun Measured)
Stellar Mass(Msun) : 1.0 (Msun Measured) 1.0 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5753 (K)
Spectral type : G3
UV portion[%]: 7.7
Visible portion[%]: 44.7
IR portion[%]: 47.6
Metalicity : 0.1
Absolute Magnitude: 3.3
Apparent Magnitude: 10.8
Right Ascension(RA) 12.8453
Declination (DEC) 8.8676
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
K2-219 d
K2-219 d

  • K2-219 d is an exoplanet orbiting the star K2-219, located about 1071.2 light-years (328.4 pc) away from Solar System. Its discovery was publicly announced on 2018.
  • The host star K2-219 has apparent magnitude of 10.8, with absolute magnitude of 3.3.
  • It is 1.0 times more massive and 1.2 times bigger compared with our Sun. The surface temperature is 5753 with its spectral types of G3
  • In this planetary system, the extrasolar planet K2-219 d orbits around the star K2-219 every 11.1 days with its orbital distance of 0.10 AU ( 14697767.0 km)
  • (Projected orbit of K2-219 d around its host star K2-219)


  • The Star K2-219 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.853 AU ( 127642065.1 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.179 AU ( 176434690.8 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.797 AU ( 268847423.9 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.645 AU ( 395620761.7 km)
  • Radiation at Planetary Boundary of K2-219 d : 197071.73 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star K2-219)



  • Kopparapu Recent Venus for Star K2-219 distance : 0.886 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star K2-219 distance : 1.122 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star K2-219 distance : 1.083 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star K2-219 distance : 1.188 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-219 distance : 1.982 AU
  • Kopparapu Outer Boundary for Early Mars for Star K2-219 distance : 2.090 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star K2-219)



  • Original Kopparapu Recent Venus for Star K2-219 distance : 0.886 AU
  • Original Kopparapu Runaway Greenhouse for Star K2-219 distance : 1.153 AU
  • Original Kopparapu Moist Greenhouse for Star K2-219 distance : 1.173 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-219 distance : 2.017 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star K2-219 distance : 2.097 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star K2-219)



    (Position in Stellar Map of star K2-219 and its Exoplanet K2-219 d)



    (Zoomed position in Stellar Map of star K2-219 and its Exoplanet K2-219 d (zoom level 3))

    (Synthetic Spectrum of star K2-219*)
    *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