HH 211

Display orbital revolution around the star HH 211
Imaginary Picture of Star HH 211
Star Name : HH 211
Alternate Name :
Star Distance (LY/pc): 913.2368 (LY) 280.0000 (pc)
Stellar Radius (Rsun): 0.0000 (Rsun, measured) 1.5000 (Rsun, estimated)
Stellar Mass (Msun): 0.0500 (Msun/observed) 0.0500 (Msun/estimated)
Spectral type : M9
Metalicity : 0.0000
Absolute Magnitude : 14.76
Apparent Magnitude : 22.00
Right Ascension(RA) : 55.98550
Declination(DEC) : 32.01467
  • This is the HH 211 . The star HH 211 islocated about 913.2 light-years (280.0 pc) away from our Solar System.
  • The star HH 211 has apparent magnitude of 22.0, with absolute magnitude of 14.8.
  • It is 0.1 times more massive and 1.5 times bigger compared with our Sun. The surface temperature is 3300 with its spectral types of M9
  • Number of Extrasolar Planets : 2
  • Name of the 1 Planet HH 211 b radius 0.907830 mass 30.000000 orbital distance 4.600000
  • Name of the 2 Planet HH 211 c radius 0.907830 mass 8.000000 orbital distance 84.000000
    (Illustration of the HH 211's Planetary System)



    The Star HH 211 's habitable zone is located at the following distance

    Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.354 AU ( 52939185.0 km)
    Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.489 AU ( 73175788.4 km)
    Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.745 AU ( 111503707.7 km)
    Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.097 AU ( 164082590.6 km)
    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HH 211)



    Kopparapu's Recent Venus for Star HH 211 distance : 0.401 AU
    Kopparapu's Runaway Greenhouse for Earth-sized planet for Star HH 211 distance : 0.507 AU
    Kopparapu's Runaway Greenhouse for Super-Earth-sized planet for Star HH 211 distance : 0.490 AU
    Kopparapu's Runaway Greenhouse for Mars-sized planet for Star HH 211 distance : 0.535 AU
    Kopparapu's Outer Boundary for Maximum Greenhouse for Star HH 211 distance : 0.996 AU
    Kopparapu's Outer Boundary for Early Mars for Star HH 211 distance : 1.051 AU
    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HH 211)



  • Original Kopparapu Recent Venus for Star HH 211 distance : 0.398 AU
  • Original Kopparapu Runaway Greenhouse for Star HH 211 distance : 0.525 AU
  • Original Kopparapu Moist Greenhouse for Star HH 211 distance : 0.527 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HH 211 distance : 1.012 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HH 211 distance : 1.053 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HH 211)



    (Position in Stellar Map of star HH 211 )



    (Zoomed position in Stellar Map of star HH 211 (zoom level 3))

    (Synthetic Spectrum of star HD 121504*)
    *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