Imaginary Picture of K2-407 b

Display orbital revolution of K2-407 b around the hoststar K2-407
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Exoplanet Name : K2-407 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.1145 (Rjup) 1.2830 (Rearth)
Mass (Mjup / Me): 0.0066 (Mjup) 2.1111 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0544 (AU) 0.0544 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0135
Orbital Period(Observed/Estimated) 4.94 (Days Obs.) 4.94 (Days Est.)
Surface Gravity (G Earth) 1.2825
Star Radiation at Atmospheric Boundary: 340411.9 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1078.1 (K)
Blackbody T 0.3(K) 1012.4 (K)
Blackbody T 0.7(K) 819.2 (K)
Tidally Locked Blackbody T 0.1(K) 1282.0 (K)
Tidally Locked Blackbody T 0.3(K) 1204.0 (K)
Size Class: super-Earth-size
Mass Class:
Detection Type : Primary Transit
Mass Detection : Theoretical
Radius Detection : Primary Transit
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : K2-407
Alternate Name : "EPIC 249403651, TYC 6764-1597-1"
Star Distance(LY) : 712.2
Stellar Radius(Rsun) : 0.9 (Rsun Measured)
Stellar Mass(Msun) : 0.9 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5563 (K)
Spectral type : G5V
UV portion[%]: 7.1
Visible portion[%]: 43.6
IR portion[%]: 49.2
Metalicity : 0.0
Absolute Magnitude: 5.5
Apparent Magnitude: 12.2
Right Ascension(RA) 232.5555
Declination (DEC) -23.0068
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
K2-407 b
K2-407 b

  • K2-407 b is an exoplanet orbiting the star K2-407, located about 712.2 light-years (218.4 pc) away from Solar System. Its discovery was publicly announced on 2022.
  • The host star K2-407 has apparent magnitude of 12.2, with absolute magnitude of 5.5.
  • It is 0.9 times more massive and 0.9 times bigger compared with our Sun. The surface temperature is 5563 with its spectral types of G5V
  • In this planetary system, the extrasolar planet K2-407 b orbits around the star K2-407 every 4.9 days with its orbital distance of 0.05 AU ( 8145604.1 km)
  • (Projected orbit of K2-407 b around its host star K2-407)


  • The Star K2-407 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.621 AU ( 92972812.0 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.859 AU ( 128512722.9 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.309 AU ( 195824949.8 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.926 AU ( 288164992.2 km)
  • Radiation at Planetary Boundary of K2-407 b : 340411.91 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star K2-407)



  • Kopparapu Recent Venus for Star K2-407 distance : 0.652 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star K2-407 distance : 0.826 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star K2-407 distance : 0.798 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star K2-407 distance : 0.875 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-407 distance : 1.468 AU
  • Kopparapu Outer Boundary for Early Mars for Star K2-407 distance : 1.548 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star K2-407)



  • Original Kopparapu Recent Venus for Star K2-407 distance : 0.651 AU
  • Original Kopparapu Runaway Greenhouse for Star K2-407 distance : 0.850 AU
  • Original Kopparapu Moist Greenhouse for Star K2-407 distance : 0.861 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-407 distance : 1.493 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star K2-407 distance : 1.553 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star K2-407)



    (Position in Stellar Map of star K2-407 and its Exoplanet K2-407 b)



    (Zoomed position in Stellar Map of star K2-407 and its Exoplanet K2-407 b (zoom level 3))

    (Synthetic Spectrum of star K2-407*)
    *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