HAT-P-18

Display orbital revolution around the star HAT-P-18
Imaginary Picture of Star HAT-P-18
Star Name : HAT-P-18
Alternate Name :
Star Distance (LY/pc): 541.4190 (LY) 166.0000 (pc)
Stellar Radius (Rsun): 0.0000 (Rsun, measured) 0.7170 (Rsun, estimated)
Stellar Mass (Msun): 0.7700 (Msun/observed) 0.7700 (Msun/estimated)
Spectral type : K
Metalicity : 0.1000
Absolute Magnitude : 6.66
Apparent Magnitude : 12.76
Right Ascension(RA) : 256.34646
Declination(DEC) : 33.01250
  • This is the HAT-P-18 . The star HAT-P-18 islocated about 541.4 light-years (166.0 pc) away from our Solar System.
  • The star HAT-P-18 has apparent magnitude of 12.8, with absolute magnitude of 6.7.
  • It is 0.8 times more massive and 0.7 times bigger compared with our Sun. The surface temperature is 4870 with its spectral types of K
  • Number of Extrasolar Planets : 1
  • Name of the 1 Planet HAT-P-18 b radius 0.947000 mass 0.183000 orbital distance 0.055900
    (Illustration of the HAT-P-18's Planetary System)



    The Star HAT-P-18 's habitable zone is located at the following distance

    Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.368 AU ( 55110606.5 km)
    Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.509 AU ( 76177260.3 km)
    Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.776 AU ( 116077286.7 km)
    Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.142 AU ( 170812812.4 km)
    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HAT-P-18)



    Kopparapu's Recent Venus for Star HAT-P-18 distance : 0.401 AU
    Kopparapu's Runaway Greenhouse for Earth-sized planet for Star HAT-P-18 distance : 0.508 AU
    Kopparapu's Runaway Greenhouse for Super-Earth-sized planet for Star HAT-P-18 distance : 0.490 AU
    Kopparapu's Runaway Greenhouse for Mars-sized planet for Star HAT-P-18 distance : 0.538 AU
    Kopparapu's Outer Boundary for Maximum Greenhouse for Star HAT-P-18 distance : 0.925 AU
    Kopparapu's Outer Boundary for Early Mars for Star HAT-P-18 distance : 0.976 AU
    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HAT-P-18)



  • Original Kopparapu Recent Venus for Star HAT-P-18 distance : 0.396 AU
  • Original Kopparapu Runaway Greenhouse for Star HAT-P-18 distance : 0.523 AU
  • Original Kopparapu Moist Greenhouse for Star HAT-P-18 distance : 0.524 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HAT-P-18 distance : 0.940 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HAT-P-18 distance : 0.978 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HAT-P-18)



    (Position in Stellar Map of star HAT-P-18 )



    (Zoomed position in Stellar Map of star HAT-P-18 (zoom level 3))

    (Synthetic Spectrum of star GJ 876*)
    *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