Imaginary Picture of K2-301 b

Display orbital revolution of K2-301 b around the hoststar K2-301
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Exoplanet Name : K2-301 b
Alternate Name : "2MASS J22300326-1336364 b, EPIC 206042996.02, WISE J223003.26-133636.4 b, EPIC 206042996 b"
Status : Confirmed
Radius (Rjup / Re): 0.1450 (Rjup) 1.6253 (Rearth)
Mass (Mjup / Me): 0.0130 (Mjup) 4.1446 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.0510 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0145
Orbital Period(Observed/Estimated) 5.30 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 1.5690
Star Radiation at Atmospheric Boundary: 57899.7 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 692.3 (K)
Blackbody T 0.3(K) 650.2 (K)
Blackbody T 0.7(K) 526.1 (K)
Tidally Locked Blackbody T 0.1(K) 823.3 (K)
Tidally Locked Blackbody T 0.3(K) 773.2 (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 : K2-301
Alternate Name : "2MASS J22300326-1336364, WISE J223003.26-133636.4, EPIC 206042996"
Star Distance(LY) : 1473.5
Stellar Radius(Rsun) : 0.7 (Rsun Measured)
Stellar Mass(Msun) : 0.6 (Msun Measured) 0.6 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 4055 (K)
Spectral type : M0V
UV portion[%]: 0.8
Visible portion[%]: 25.4
IR portion[%]: 73.8
Metalicity : 0.0
Absolute Magnitude: 8.5
Apparent Magnitude: 16.7
Right Ascension(RA) 337.5136
Declination (DEC) -13.6101
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+206042996&submit=SIMBAD+search
Open Exoplanet Database Link
K2-301 b
K2-301 b
  • K2-301 b is an exoplanet orbiting the star K2-301, located about 1473.5 light-years (451.8 pc) away from Solar System. Its discovery was publicly announced on 2019.
  • The host star K2-301 has apparent magnitude of 16.7, with absolute magnitude of 8.5.
  • It is 0.6 times more massive and 0.7 times bigger compared with our Sun. The surface temperature is 4055 with its spectral types of M0V
  • In this planetary system, the extrasolar planet K2-301 b orbits around the star K2-301 every 5.3 days with its orbital distance of 0.05 AU ( 7626725.3 km)
    • (Projected orbit of K2-301 b around its host star K2-301)


  • The Star K2-301 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.240 AU ( 35900986.0 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.332 AU ( 49624544.8 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.505 AU ( 75616824.3 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.744 AU ( 111273469.6 km)
  • Radiation at Planetary Boundary of K2-301 b : 57899.65 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star K2-301)



  • Kopparapu Recent Venus for Star K2-301 distance : 0.269 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star K2-301 distance : 0.340 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star K2-301 distance : 0.328 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star K2-301 distance : 0.361 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-301 distance : 0.643 AU
  • Kopparapu Outer Boundary for Early Mars for Star K2-301 distance : 0.679 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star K2-301)



  • Original Kopparapu Recent Venus for Star K2-301 distance : 0.265 AU
  • Original Kopparapu Runaway Greenhouse for Star K2-301 distance : 0.351 AU
  • Original Kopparapu Moist Greenhouse for Star K2-301 distance : 0.351 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-301 distance : 0.654 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star K2-301 distance : 0.680 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star K2-301)



    (Position in Stellar Map of star K2-301 and its Exoplanet K2-301 b)



    (Zoomed position in Stellar Map of star K2-301 and its Exoplanet K2-301 b (zoom level 3))

    (Synthetic Spectrum of star K2-301*)
    *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