Kepler-81

Display orbital revolution around the star Kepler-81
Imaginary Picture of Star Kepler-81
Star Name : Kepler-81
Alternate Name : "2MASS J19343286+4249298, KIC 7287995, KOI-877, WISE J193432.86+424929.4"
Star Distance (LY/pc): 1147.3842 (LY) 351.7900 (pc)
Stellar Radius (Rsun): 0.0000 (Rsun, measured) 0.5900 (Rsun, estimated)
Stellar Mass (Msun): 0.6480 (Msun/observed) 0.6480 (Msun/estimated)
Spectral type : M0 V
Metalicity : -0.2000
Absolute Magnitude : 7.83
Apparent Magnitude : 15.56
Right Ascension(RA) : 293.63695
Declination(DEC) : 42.82497
  • This is the Kepler-81 . The star Kepler-81 islocated about 1147.4 light-years (351.8 pc) away from our Solar System.
  • The star Kepler-81 has apparent magnitude of 15.6, with absolute magnitude of 7.8.
  • It is 0.6 times more massive and 0.6 times bigger compared with our Sun. The surface temperature is 4500 with its spectral types of M0 V
  • Number of Extrasolar Planets : 3
  • Name of the 1 Planet Kepler-81 b radius 0.216000 mass 0.018885 orbital distance 0.056000
  • Name of the 2 Planet Kepler-81 c radius 0.211000 mass 0.018478 orbital distance 0.089000
  • Name of the 3 Planet Kepler-81 d radius 0.108000 mass 0.006124 orbital distance 0.128000
    (Illustration of the Kepler-81's Planetary System)



    The Star Kepler-81 's habitable zone is located at the following distance

    Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.259 AU ( 38719982.4 km)
    Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.358 AU ( 53521134.5 km)
    Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.545 AU ( 81554364.7 km)
    Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.802 AU ( 120010820.4 km)
    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-81)



    Kopparapu's Recent Venus for Star Kepler-81 distance : 0.286 AU
    Kopparapu's Runaway Greenhouse for Earth-sized planet for Star Kepler-81 distance : 0.362 AU
    Kopparapu's Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-81 distance : 0.350 AU
    Kopparapu's Runaway Greenhouse for Mars-sized planet for Star Kepler-81 distance : 0.383 AU
    Kopparapu's Outer Boundary for Maximum Greenhouse for Star Kepler-81 distance : 0.670 AU
    Kopparapu's Outer Boundary for Early Mars for Star Kepler-81 distance : 0.707 AU
    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-81)



  • Original Kopparapu Recent Venus for Star Kepler-81 distance : 0.282 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-81 distance : 0.374 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-81 distance : 0.373 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-81 distance : 0.681 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-81 distance : 0.708 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-81)



    (Position in Stellar Map of star Kepler-81 )



    (Zoomed position in Stellar Map of star Kepler-81 (zoom level 3))

    (Synthetic Spectrum of star HIP 54597*)
    *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