TOI-421

Display orbital revolution around the star TOI-421
Imaginary Picture of Star TOI-421
Star Name : TOI-421
Alternate Name :
Star Distance (LY/pc): 0.0000 (LY) 0.0000 (pc)
Stellar Radius (Rsun): 0.0000 (Rsun, measured) 0.4336 (Rsun, estimated)
Stellar Mass (Msun): 0.0000 (Msun/observed) 0.8337 (Msun/estimated)
Spectral type : M9
Metalicity : 0.0000
Absolute Magnitude : 25.00
Apparent Magnitude : 22.00
Right Ascension(RA) : 81.85417
Declination(DEC) : -14.27694
  • The star TOI-421 has apparent magnitude of 22.0, with absolute magnitude of 25.0.
  • Number of Extrasolar Planets : 2
  • Name of the 1 Planet TOI-421 b radius 0.235500 mass 0.021100 orbital distance 0.055400
  • Name of the 2 Planet TOI-421 c radius 0.454100 mass 0.044400 orbital distance 0.117000
    (Illustration of the TOI-421's Planetary System)



    The Star TOI-421 's habitable zone is located at the following distance

    Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.102 AU ( 15301294.9 km)
    Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.141 AU ( 21150388.3 km)
    Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.215 AU ( 32228511.1 km)
    Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.317 AU ( 47425666.0 km)
    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star TOI-421)



    Kopparapu's Recent Venus for Star TOI-421 distance : 0.116 AU
    Kopparapu's Runaway Greenhouse for Earth-sized planet for Star TOI-421 distance : 0.147 AU
    Kopparapu's Runaway Greenhouse for Super-Earth-sized planet for Star TOI-421 distance : 0.142 AU
    Kopparapu's Runaway Greenhouse for Mars-sized planet for Star TOI-421 distance : 0.155 AU
    Kopparapu's Outer Boundary for Maximum Greenhouse for Star TOI-421 distance : 0.288 AU
    Kopparapu's Outer Boundary for Early Mars for Star TOI-421 distance : 0.304 AU
    (Habitable zone calculated based on Kopparapu et al.(2013) around the star TOI-421)



  • Original Kopparapu Recent Venus for Star TOI-421 distance : 0.115 AU
  • Original Kopparapu Runaway Greenhouse for Star TOI-421 distance : 0.152 AU
  • Original Kopparapu Moist Greenhouse for Star TOI-421 distance : 0.152 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI-421 distance : 0.293 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star TOI-421 distance : 0.304 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star TOI-421)



    (Position in Stellar Map of star TOI-421 )



    (Zoomed position in Stellar Map of star TOI-421 (zoom level 3))

    (Synthetic Spectrum of star Kepler-1680*)
    *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