WASP-21

Display orbital revolution around the star WASP-21
Imaginary Picture of Star WASP-21
Star Name : WASP-21
Alternate Name :
Star Distance (LY/pc): 750.1588 (LY) 230.0000 (pc)
Stellar Radius (Rsun): 0.0000 (Rsun, measured) 1.0600 (Rsun, estimated)
Stellar Mass (Msun): 1.0100 (Msun/observed) 1.0100 (Msun/estimated)
Spectral type : G3V
Metalicity : -0.4000
Absolute Magnitude : 4.79
Apparent Magnitude : 11.60
Right Ascension(RA) : 347.49273
Declination(DEC) : 18.39611
  • This is the WASP-21 . The star WASP-21 islocated about 750.2 light-years (230.0 pc) away from our Solar System.
  • The star WASP-21 has apparent magnitude of 11.6, with absolute magnitude of 4.8.
  • It is 1.0 times more massive and 1.1 times bigger compared with our Sun. The surface temperature is 5800 with its spectral types of G3V
  • Number of Extrasolar Planets : 1
  • Name of the 1 Planet WASP-21 b radius 1.210000 mass 0.300000 orbital distance 0.052000
    (Illustration of the WASP-21's Planetary System)



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

    Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.772 AU ( 115563308.0 km)
    Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.068 AU ( 159738691.9 km)
    Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.627 AU ( 243406416.3 km)
    Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.394 AU ( 358183204.6 km)
    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star WASP-21)



    Kopparapu's Recent Venus for Star WASP-21 distance : 0.800 AU
    Kopparapu's Runaway Greenhouse for Earth-sized planet for Star WASP-21 distance : 1.013 AU
    Kopparapu's Runaway Greenhouse for Super-Earth-sized planet for Star WASP-21 distance : 0.978 AU
    Kopparapu's Runaway Greenhouse for Mars-sized planet for Star WASP-21 distance : 1.072 AU
    Kopparapu's Outer Boundary for Maximum Greenhouse for Star WASP-21 distance : 1.787 AU
    Kopparapu's Outer Boundary for Early Mars for Star WASP-21 distance : 1.885 AU
    (Habitable zone calculated based on Kopparapu et al.(2013) around the star WASP-21)



  • Original Kopparapu Recent Venus for Star WASP-21 distance : 0.801 AU
  • Original Kopparapu Runaway Greenhouse for Star WASP-21 distance : 1.040 AU
  • Original Kopparapu Moist Greenhouse for Star WASP-21 distance : 1.060 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star WASP-21 distance : 1.818 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star WASP-21 distance : 1.891 AU

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



    (Position in Stellar Map of star WASP-21 )



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

    (Synthetic Spectrum of star K2-187*)
    *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