Kepler-4

Display orbital revolution around the star Kepler-4
Imaginary Picture of Star Kepler-4
Star Name : Kepler-4
Alternate Name : "2MASS J19022767+5008087, KIC 11853905, KOI-7, WISE J190227.69+500808.7"
Star Distance (LY/pc): 1793.8580 (LY) 550.0000 (pc)
Stellar Radius (Rsun): 0.0000 (Rsun, measured) 1.4900 (Rsun, estimated)
Stellar Mass (Msun): 1.2200 (Msun/observed) 1.2200 (Msun/estimated)
Spectral type : G0
Metalicity : 0.1700
Absolute Magnitude : 4.00
Apparent Magnitude : 12.70
Right Ascension(RA) : 285.61532
Declination(DEC) : 50.13575
  • This is the Kepler-4 . The star Kepler-4 islocated about 1793.9 light-years (550.0 pc) away from our Solar System.
  • The star Kepler-4 has apparent magnitude of 12.7, with absolute magnitude of 4.0.
  • It is 1.2 times more massive and 1.5 times bigger compared with our Sun. The surface temperature is 5857 with its spectral types of G0
  • Number of Extrasolar Planets : 1
  • Name of the 1 Planet Kepler-4 b radius 0.357000 mass 0.077000 orbital distance 0.045600
    (Illustration of the Kepler-4's Planetary System)



    The Star Kepler-4 's habitable zone is located at the following distance

    Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.107 AU ( 165651292.5 km)
    Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.531 AU ( 228973376.1 km)
    Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.332 AU ( 348904753.5 km)
    Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 3.432 AU ( 513428629.4 km)
    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-4)



    Kopparapu's Recent Venus for Star Kepler-4 distance : 1.142 AU
    Kopparapu's Runaway Greenhouse for Earth-sized planet for Star Kepler-4 distance : 1.446 AU
    Kopparapu's Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-4 distance : 1.397 AU
    Kopparapu's Runaway Greenhouse for Mars-sized planet for Star Kepler-4 distance : 1.531 AU
    Kopparapu's Outer Boundary for Maximum Greenhouse for Star Kepler-4 distance : 2.549 AU
    Kopparapu's Outer Boundary for Early Mars for Star Kepler-4 distance : 2.689 AU
    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-4)



  • Original Kopparapu Recent Venus for Star Kepler-4 distance : 1.146 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-4 distance : 1.486 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-4 distance : 1.516 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-4 distance : 2.594 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-4 distance : 2.698 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-4)



    (Position in Stellar Map of star Kepler-4 )



    (Zoomed position in Stellar Map of star Kepler-4 (zoom level 3))

    (Synthetic Spectrum of star HD 202696*)
    *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