NGTS-21

Display orbital revolution around the star NGTS-21
Imaginary Picture of Star NGTS-21
Star Name : NGTS-21
Alternate Name :
Star Distance (LY/pc): 2090.6600 (LY) 641.0000 (pc)
Stellar Radius (Rsun): 0.0000 (Rsun, measured) 0.8600 (Rsun, estimated)
Stellar Mass (Msun): 0.7200 (Msun/observed) 0.7200 (Msun/estimated)
Spectral type : K4
Metalicity : -0.2600
Absolute Magnitude : 6.57
Apparent Magnitude : 15.60
Right Ascension(RA) : 311.25833
Declination(DEC) : -35.42778
  • This is the NGTS-21 . The star NGTS-21 islocated about 2090.7 light-years (641.0 pc) away from our Solar System.
  • The star NGTS-21 has apparent magnitude of 15.6, with absolute magnitude of 6.6.
  • It is 0.7 times more massive and 0.9 times bigger compared with our Sun. The surface temperature is 4660 with its spectral types of K4
  • Number of Extrasolar Planets : 1
  • Name of the 1 Planet NGTS-21 b radius 1.330000 mass 2.360000 orbital distance 0.023600
    (Illustration of the NGTS-21's Planetary System)



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

    Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.405 AU ( 60524107.9 km)
    Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.559 AU ( 83660134.0 km)
    Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.852 AU ( 127479530.3 km)
    Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.254 AU ( 187591713.3 km)
    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star NGTS-21)



    Kopparapu's Recent Venus for Star NGTS-21 distance : 0.444 AU
    Kopparapu's Runaway Greenhouse for Earth-sized planet for Star NGTS-21 distance : 0.562 AU
    Kopparapu's Runaway Greenhouse for Super-Earth-sized planet for Star NGTS-21 distance : 0.543 AU
    Kopparapu's Runaway Greenhouse for Mars-sized planet for Star NGTS-21 distance : 0.596 AU
    Kopparapu's Outer Boundary for Maximum Greenhouse for Star NGTS-21 distance : 1.034 AU
    Kopparapu's Outer Boundary for Early Mars for Star NGTS-21 distance : 1.091 AU
    (Habitable zone calculated based on Kopparapu et al.(2013) around the star NGTS-21)



  • Original Kopparapu Recent Venus for Star NGTS-21 distance : 0.438 AU
  • Original Kopparapu Runaway Greenhouse for Star NGTS-21 distance : 0.580 AU
  • Original Kopparapu Moist Greenhouse for Star NGTS-21 distance : 0.580 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star NGTS-21 distance : 1.051 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star NGTS-21 distance : 1.093 AU

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



    (Position in Stellar Map of star NGTS-21 )



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

    (Synthetic Spectrum of star Kepler-1304*)
    *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