Imaginary Picture of K2-299 b

Display orbital revolution of K2-299 b around the hoststar K2-299
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Exoplanet Name : K2-299 b
Alternate Name : "2MASS J22050653-1407180 b, EPIC 206024342.03, WISE J220506.51-140718.2 b, EPIC 206024342 b"
Status : Confirmed
Radius (Rjup / Re): 0.1520 (Rjup) 1.7038 (Rearth)
Mass (Mjup / Me): 0.0136 (Mjup) 4.3304 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.0521 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0123
Orbital Period(Observed/Estimated) 4.51 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 1.4918
Star Radiation at Atmospheric Boundary: 356152.7 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1090.3 (K)
Blackbody T 0.3(K) 1023.9 (K)
Blackbody T 0.7(K) 828.5 (K)
Tidally Locked Blackbody T 0.1(K) 1296.6 (K)
Tidally Locked Blackbody T 0.3(K) 1217.7 (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 : K2-299
Alternate Name : "2MASS J22050653-1407180, WISE J220506.51-140718.2, EPIC 206024342"
Star Distance(LY) : 1219.2
Stellar Radius(Rsun) : 0.8 (Rsun Measured)
Stellar Mass(Msun) : 0.9 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5759 (K)
Spectral type : G2V
UV portion[%]: 7.8
Visible portion[%]: 44.7
IR portion[%]: 47.5
Metalicity : -0.2
Absolute Magnitude: 5.3
Apparent Magnitude: 13.1
Right Ascension(RA) 331.2772
Declination (DEC) -14.1217
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=EPIC+206024342&submit=SIMBAD+search
Open Exoplanet Database Link
K2-299 b
K2-299 b

  • K2-299 b is an exoplanet orbiting the star K2-299, located about 1219.2 light-years (373.8 pc) away from Solar System. Its discovery was publicly announced on 2019.
  • The host star K2-299 has apparent magnitude of 13.1, with absolute magnitude of 5.3.
  • It is 0.9 times more massive and 0.8 times bigger compared with our Sun. The surface temperature is 5759 with its spectral types of G2V
  • In this planetary system, the extrasolar planet K2-299 b orbits around the star K2-299 every 4.5 days with its orbital distance of 0.05 AU ( 7798072.3 km)
  • (Projected orbit of K2-299 b around its host star K2-299)


  • The Star K2-299 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.609 AU ( 91040719.2 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.841 AU ( 125842065.7 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.282 AU ( 191755459.4 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.886 AU ( 282176558.7 km)
  • Radiation at Planetary Boundary of K2-299 b : 356152.71 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star K2-299)



  • Kopparapu Recent Venus for Star K2-299 distance : 0.631 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star K2-299 distance : 0.800 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star K2-299 distance : 0.772 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star K2-299 distance : 0.847 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-299 distance : 1.413 AU
  • Kopparapu Outer Boundary for Early Mars for Star K2-299 distance : 1.490 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star K2-299)



  • Original Kopparapu Recent Venus for Star K2-299 distance : 0.632 AU
  • Original Kopparapu Runaway Greenhouse for Star K2-299 distance : 0.822 AU
  • Original Kopparapu Moist Greenhouse for Star K2-299 distance : 0.836 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-299 distance : 1.438 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star K2-299 distance : 1.495 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star K2-299)



    (Position in Stellar Map of star K2-299 and its Exoplanet K2-299 b)



    (Zoomed position in Stellar Map of star K2-299 and its Exoplanet K2-299 b (zoom level 3))

    (Synthetic Spectrum of star K2-299*)
    *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