K2-81

Display orbital revolution around the star K2-81
Imaginary Picture of Star K2-81
Star Name : K2-81
Alternate Name : "2MASS J03495652+1430080, EPIC 210448987, WISE J034956.50+143007.5"
Star Distance (LY/pc): 816.3288 (LY) 250.2878 (pc)
Stellar Radius (Rsun): 0.0000 (Rsun, measured) 0.6300 (Rsun, estimated)
Stellar Mass (Msun): 0.7500 (Msun/observed) 0.7500 (Msun/estimated)
Spectral type : K4
Metalicity : 0.0000
Absolute Magnitude : 5.06
Apparent Magnitude : 12.05
Right Ascension(RA) : 57.48549
Declination(DEC) : 14.50220
  • This is the K2-81 . The star K2-81 islocated about 816.3 light-years (250.3 pc) away from our Solar System.
  • The star K2-81 has apparent magnitude of 12.0, with absolute magnitude of 5.1.
  • It is 0.8 times more massive and 0.6 times bigger compared with our Sun. The surface temperature is 4674 with its spectral types of K4
  • Number of Extrasolar Planets : 1
  • Name of the 1 Planet K2-81 b radius 0.176000 mass 0.015610 orbital distance 0.059000
    (Illustration of the K2-81's Planetary System)



    The Star K2-81 's habitable zone is located at the following distance

    Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.298 AU ( 44604233.2 km)
    Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.412 AU ( 61654706.8 km)
    Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.628 AU ( 93948129.0 km)
    Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.924 AU ( 138248787.4 km)
    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star K2-81)



    Kopparapu's Recent Venus for Star K2-81 distance : 0.327 AU
    Kopparapu's Runaway Greenhouse for Earth-sized planet for Star K2-81 distance : 0.414 AU
    Kopparapu's Runaway Greenhouse for Super-Earth-sized planet for Star K2-81 distance : 0.400 AU
    Kopparapu's Runaway Greenhouse for Mars-sized planet for Star K2-81 distance : 0.439 AU
    Kopparapu's Outer Boundary for Maximum Greenhouse for Star K2-81 distance : 0.761 AU
    Kopparapu's Outer Boundary for Early Mars for Star K2-81 distance : 0.803 AU
    (Habitable zone calculated based on Kopparapu et al.(2013) around the star K2-81)



  • Original Kopparapu Recent Venus for Star K2-81 distance : 0.323 AU
  • Original Kopparapu Runaway Greenhouse for Star K2-81 distance : 0.427 AU
  • Original Kopparapu Moist Greenhouse for Star K2-81 distance : 0.427 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-81 distance : 0.774 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star K2-81 distance : 0.805 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star K2-81)



    (Position in Stellar Map of star K2-81 )



    (Zoomed position in Stellar Map of star K2-81 (zoom level 3))

    (Synthetic Spectrum of star Kepler-892*)
    *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