HATS-21

Display orbital revolution around the star HATS-21
Imaginary Picture of Star HATS-21
Star Name : HATS-21
Alternate Name :
Star Distance (LY/pc): 932.8062 (LY) 286.0000 (pc)
Stellar Radius (Rsun): 0.0000 (Rsun, measured) 1.0210 (Rsun, estimated)
Stellar Mass (Msun): 1.0800 (Msun/observed) 1.0800 (Msun/estimated)
Spectral type : G4V
Metalicity : 0.3000
Absolute Magnitude : 4.92
Apparent Magnitude : 12.20
Right Ascension(RA) : 280.18333
Declination(DEC) : -58.45917
  • This is the HATS-21 . The star HATS-21 islocated about 932.8 light-years (286.0 pc) away from our Solar System.
  • The star HATS-21 has apparent magnitude of 12.2, with absolute magnitude of 4.9.
  • It is 1.1 times more massive and 1.0 times bigger compared with our Sun. The surface temperature is 5695 with its spectral types of G4V
  • Number of Extrasolar Planets : 1
  • Name of the 1 Planet HATS-21 b radius 1.123000 mass 0.332000 orbital distance 0.046760
    (Illustration of the HATS-21's Planetary System)



    The Star HATS-21 's habitable zone is located at the following distance

    Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.717 AU ( 107317688.9 km)
    Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.992 AU ( 148341091.5 km)
    Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.511 AU ( 226038995.6 km)
    Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.223 AU ( 332626284.2 km)
    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HATS-21)



    Kopparapu's Recent Venus for Star HATS-21 distance : 0.747 AU
    Kopparapu's Runaway Greenhouse for Earth-sized planet for Star HATS-21 distance : 0.946 AU
    Kopparapu's Runaway Greenhouse for Super-Earth-sized planet for Star HATS-21 distance : 0.914 AU
    Kopparapu's Runaway Greenhouse for Mars-sized planet for Star HATS-21 distance : 1.002 AU
    Kopparapu's Outer Boundary for Maximum Greenhouse for Star HATS-21 distance : 1.675 AU
    Kopparapu's Outer Boundary for Early Mars for Star HATS-21 distance : 1.766 AU
    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HATS-21)



  • Original Kopparapu Recent Venus for Star HATS-21 distance : 0.747 AU
  • Original Kopparapu Runaway Greenhouse for Star HATS-21 distance : 0.973 AU
  • Original Kopparapu Moist Greenhouse for Star HATS-21 distance : 0.988 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HATS-21 distance : 1.704 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HATS-21 distance : 1.772 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HATS-21)



    (Position in Stellar Map of star HATS-21 )



    (Zoomed position in Stellar Map of star HATS-21 (zoom level 3))

    (Synthetic Spectrum of star GSC 06784-00997*)
    *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