HD 31221

Display orbital revolution around the star HD 31221
Imaginary Picture of Star HD 31221
Star Name : HD 31221
Alternate Name :
Star Distance (LY/pc): 404.4334 (LY) 124.0000 (pc)
Stellar Radius (Rsun): 0.0000 (Rsun, measured) 1.5500 (Rsun, estimated)
Stellar Mass (Msun): 1.4470 (Msun/observed) 1.4470 (Msun/estimated)
Spectral type : A2
Metalicity : 0.0000
Absolute Magnitude : 2.53
Apparent Magnitude : 8.00
Right Ascension(RA) : 73.70417
Declination(DEC) : 22.14639
  • This is the HD 31221 . The star HD 31221 islocated about 404.4 light-years (124.0 pc) away from our Solar System.
  • The star HD 31221 has apparent magnitude of 8.0, with absolute magnitude of 2.5.
  • It is 1.4 times more massive and 1.6 times bigger compared with our Sun. The surface temperature is 9040 with its spectral types of A2
  • Number of Extrasolar Planets : 1
  • Name of the 1 Planet HD 31221 b radius 1.320000 mass 12.000000 orbital distance 0.000000
    (Illustration of the HD 31221's Planetary System)



    The Star HD 31221 's habitable zone is located at the following distance

    Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 2.744 AU ( 410512770.1 km)
    Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 3.793 AU ( 567435928.1 km)
    Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 5.780 AU ( 864646781.2 km)
    Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 8.505 AU ( 1272365616.2 km)
    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 31221)



    Kopparapu's Recent Venus for Star HD 31221 distance : 2.727 AU
    Kopparapu's Runaway Greenhouse for Earth-sized planet for Star HD 31221 distance : 3.456 AU
    Kopparapu's Runaway Greenhouse for Super-Earth-sized planet for Star HD 31221 distance : 3.338 AU
    Kopparapu's Runaway Greenhouse for Mars-sized planet for Star HD 31221 distance : 3.611 AU
    Kopparapu's Outer Boundary for Maximum Greenhouse for Star HD 31221 distance : 5.989 AU
    Kopparapu's Outer Boundary for Early Mars for Star HD 31221 distance : 6.313 AU
    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 31221)



  • Original Kopparapu Recent Venus for Star HD 31221 distance : 2.767 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 31221 distance : 3.513 AU
  • Original Kopparapu Moist Greenhouse for Star HD 31221 distance : 3.661 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 31221 distance : 6.079 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 31221 distance : 6.321 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 31221)



    (Position in Stellar Map of star HD 31221 )



    (Zoomed position in Stellar Map of star HD 31221 (zoom level 3))

    (Synthetic Spectrum of star HD 1666*)
    *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