K2-309

Display orbital revolution around the star K2-309
Imaginary Picture of Star K2-309
Star Name : K2-309
Alternate Name : *V1298 Tau
Star Distance (LY/pc): 353.8793 (LY) 108.5000 (pc)
Stellar Radius (Rsun): 0.0000 (Rsun, measured) 1.3050 (Rsun, estimated)
Stellar Mass (Msun): 1.1000 (Msun/observed) 1.1000 (Msun/estimated)
Spectral type : K0-K1.5
Metalicity : 0.0000
Absolute Magnitude : 4.92
Apparent Magnitude : 10.10
Right Ascension(RA) : 61.33333
Declination(DEC) : 20.15722
  • This is the K2-309 . The star K2-309 islocated about 353.9 light-years (108.5 pc) away from our Solar System.
  • The star K2-309 has apparent magnitude of 10.1, with absolute magnitude of 4.9.
  • It is 1.1 times more massive and 1.3 times bigger compared with our Sun. The surface temperature is 4970 with its spectral types of K0-K1.5
  • Number of Extrasolar Planets : 4
  • Name of the 1 Planet K2-309 b radius 0.680000 mass 0.076000 orbital distance 0.171600
  • Name of the 2 Planet K2-309 c radius 0.467500 mass 0.062300 orbital distance 0.083900
  • Name of the 3 Planet K2-309 d radius 0.565600 mass 0.113000 orbital distance 0.110100
  • Name of the 4 Planet K2-309 e radius 0.848000 mass 0.660000 orbital distance 0.266700
    (Illustration of the K2-309's Planetary System)



    The Star K2-309 's habitable zone is located at the following distance

    Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.698 AU ( 104467548.1 km)
    Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.965 AU ( 144401452.1 km)
    Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.471 AU ( 220035857.0 km)
    Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.164 AU ( 323792402.7 km)
    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star K2-309)



    Kopparapu's Recent Venus for Star K2-309 distance : 0.756 AU
    Kopparapu's Runaway Greenhouse for Earth-sized planet for Star K2-309 distance : 0.958 AU
    Kopparapu's Runaway Greenhouse for Super-Earth-sized planet for Star K2-309 distance : 0.925 AU
    Kopparapu's Runaway Greenhouse for Mars-sized planet for Star K2-309 distance : 1.015 AU
    Kopparapu's Outer Boundary for Maximum Greenhouse for Star K2-309 distance : 1.738 AU
    Kopparapu's Outer Boundary for Early Mars for Star K2-309 distance : 1.833 AU
    (Habitable zone calculated based on Kopparapu et al.(2013) around the star K2-309)



  • Original Kopparapu Recent Venus for Star K2-309 distance : 0.748 AU
  • Original Kopparapu Runaway Greenhouse for Star K2-309 distance : 0.987 AU
  • Original Kopparapu Moist Greenhouse for Star K2-309 distance : 0.990 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-309 distance : 1.767 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star K2-309 distance : 1.838 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star K2-309)



    (Position in Stellar Map of star K2-309 )



    (Zoomed position in Stellar Map of star K2-309 (zoom level 3))

    (Synthetic Spectrum of star Kepler-1091*)
    *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