HD 11977
Imaginary Picture of Star HD 11977
Star Name : HD 11977
Alternate Name :
Star Distance (LY/pc): 218.7498 (LY) 67.0691 (pc)
Stellar Radius (Rsun): 0.0000 (Rsun, measured) 13.0000 (Rsun, estimated)
Stellar Mass (Msun): 1.9100 (Msun/observed) 1.9100 (Msun/estimated)
Spectral type : G8.5 III
Metalicity : -0.2100
Absolute Magnitude : 0.57
Apparent Magnitude : 4.70
Right Ascension(RA) : 28.73388
Declination(DEC) : -67.64722
  • This is the HD 11977 . The star HD 11977 islocated about 218.7 light-years (67.1 pc) away from our Solar System.
  • The star HD 11977 has apparent magnitude of 4.7, with absolute magnitude of 0.6.
  • It is 1.9 times more massive and 13.0 times bigger compared with our Sun. The surface temperature is 4975 with its spectral types of G8.5 III
  • Number of Extrasolar Planets : 1
  • Name of the 1 Planet HD 11977 b radius 0.907830 mass 6.290000 orbital distance 1.890000
    (Illustration of the HD 11977's Planetary System)



    The Star HD 11977 's habitable zone is located at the following distance

    Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 6.970 AU ( 1042767855.1 km)
    Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 9.635 AU ( 1441377683.6 km)
    Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 14.682 AU ( 2196340613.6 km)
    Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 21.605 AU ( 3232011428.5 km)
    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 11977)



    Kopparapu's Recent Venus for Star HD 11977 distance : 7.549 AU
    Kopparapu's Runaway Greenhouse for Earth-sized planet for Star HD 11977 distance : 9.558 AU
    Kopparapu's Runaway Greenhouse for Super-Earth-sized planet for Star HD 11977 distance : 9.232 AU
    Kopparapu's Runaway Greenhouse for Mars-sized planet for Star HD 11977 distance : 10.125 AU
    Kopparapu's Outer Boundary for Maximum Greenhouse for Star HD 11977 distance : 17.342 AU
    Kopparapu's Outer Boundary for Early Mars for Star HD 11977 distance : 18.292 AU
    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 11977)



  • Original Kopparapu Recent Venus for Star HD 11977 distance : 7.468 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 11977 distance : 9.851 AU
  • Original Kopparapu Moist Greenhouse for Star HD 11977 distance : 9.882 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 11977 distance : 17.632 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 11977 distance : 18.337 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 11977)



    (Position in Stellar Map of star HD 11977 )



    (Zoomed position in Stellar Map of star HD 11977 (zoom level 3))