HD 81688

Display orbital revolution around the star HD 81688
Imaginary Picture of Star HD 81688
Star Name : HD 81688
Alternate Name :
Star Distance (LY/pc): 279.9622 (LY) 85.8369 (pc)
Stellar Radius (Rsun): 0.0000 (Rsun, measured) 13.0000 (Rsun, estimated)
Stellar Mass (Msun): 2.1000 (Msun/observed) 2.1000 (Msun/estimated)
Spectral type : K0III-IV
Metalicity : -0.3590
Absolute Magnitude : 0.74
Apparent Magnitude : 5.41
Right Ascension(RA) : 142.16662
Declination(DEC) : 45.60139
  • This is the HD 81688 . The star HD 81688 islocated about 280.0 light-years (85.8 pc) away from our Solar System.
  • The star HD 81688 has apparent magnitude of 5.4, with absolute magnitude of 0.7.
  • It is 2.1 times more massive and 13.0 times bigger compared with our Sun. The surface temperature is 4753 with its spectral types of K0III-IV
  • Number of Extrasolar Planets : 1
  • Name of the 1 Planet HD 81688 b radius 1.049895 mass 1.770000 orbital distance 0.660000
    (Illustration of the HD 81688's Planetary System)



    The Star HD 81688 's habitable zone is located at the following distance

    Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 6.362 AU ( 951781136.9 km)
    Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 8.794 AU ( 1315610261.3 km)
    Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 13.401 AU ( 2004698894.3 km)
    Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 19.720 AU ( 2950002243.1 km)
    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 81688)



    Kopparapu's Recent Venus for Star HD 81688 distance : 6.959 AU
    Kopparapu's Runaway Greenhouse for Earth-sized planet for Star HD 81688 distance : 8.810 AU
    Kopparapu's Runaway Greenhouse for Super-Earth-sized planet for Star HD 81688 distance : 8.510 AU
    Kopparapu's Runaway Greenhouse for Mars-sized planet for Star HD 81688 distance : 9.331 AU
    Kopparapu's Outer Boundary for Maximum Greenhouse for Star HD 81688 distance : 16.134 AU
    Kopparapu's Outer Boundary for Early Mars for Star HD 81688 distance : 17.019 AU
    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 81688)



  • Original Kopparapu Recent Venus for Star HD 81688 distance : 6.873 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 81688 distance : 9.087 AU
  • Original Kopparapu Moist Greenhouse for Star HD 81688 distance : 9.094 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 81688 distance : 16.401 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 81688 distance : 17.056 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 81688)



    (Position in Stellar Map of star HD 81688 )



    (Zoomed position in Stellar Map of star HD 81688 (zoom level 3))

    (Synthetic Spectrum of star HD 19994 A*)
    *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