KELT-21
Imaginary Picture of Star KELT-21
Star Name : KELT-21
Alternate Name :
Star Distance (LY/pc): 1353.5474 (LY) 415.0000 (pc)
Stellar Radius (Rsun): 0.0000 (Rsun, measured) 1.6380 (Rsun, estimated)
Stellar Mass (Msun): 1.4580 (Msun/observed) 1.4580 (Msun/estimated)
Spectral type : A8V
Metalicity : -0.4050
Absolute Magnitude : 2.41
Apparent Magnitude : 10.50
Right Ascension(RA) : 304.80000
Declination(DEC) : 32.58111
  • This is the KELT-21 . The star KELT-21 islocated about 1353.5 light-years (415.0 pc) away from our Solar System.
  • The star KELT-21 has apparent magnitude of 10.5, with absolute magnitude of 2.4.
  • It is 1.5 times more massive and 1.6 times bigger compared with our Sun. The surface temperature is 7598 with its spectral types of A8V
  • Number of Extrasolar Planets : 1
  • Name of the 1 Planet KELT-21 b radius 1.586000 mass 3.910000 orbital distance 0.052240
    (Illustration of the KELT-21's Planetary System)



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

    Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 2.049 AU ( 306457735.6 km)
    Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 2.832 AU ( 423604677.6 km)
    Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 4.315 AU ( 645479785.2 km)
    Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 6.349 AU ( 949851780.6 km)
    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star KELT-21)



    Kopparapu's Recent Venus for Star KELT-21 distance : 1.937 AU
    Kopparapu's Runaway Greenhouse for Earth-sized planet for Star KELT-21 distance : 2.453 AU
    Kopparapu's Runaway Greenhouse for Super-Earth-sized planet for Star KELT-21 distance : 2.369 AU
    Kopparapu's Runaway Greenhouse for Mars-sized planet for Star KELT-21 distance : 2.586 AU
    Kopparapu's Outer Boundary for Maximum Greenhouse for Star KELT-21 distance : 4.230 AU
    Kopparapu's Outer Boundary for Early Mars for Star KELT-21 distance : 4.460 AU
    (Habitable zone calculated based on Kopparapu et al.(2013) around the star KELT-21)



  • Original Kopparapu Recent Venus for Star KELT-21 distance : 2.009 AU
  • Original Kopparapu Runaway Greenhouse for Star KELT-21 distance : 2.507 AU
  • Original Kopparapu Moist Greenhouse for Star KELT-21 distance : 2.659 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star KELT-21 distance : 4.306 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star KELT-21 distance : 4.478 AU

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



    (Position in Stellar Map of star KELT-21 )



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