eta2 Hyi

Display orbital revolution around the star eta2 Hyi
Imaginary Picture of Star eta2 Hyi
Star Name : eta2 Hyi
Alternate Name : HD 11977
Star Distance (LY/pc): 216.8937 (LY) 66.5000 (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 : 0.59
Apparent Magnitude : 4.70
Right Ascension(RA) : 28.73333
Declination(DEC) : -67.64722
  • This is the eta2 Hyi . The star eta2 Hyi islocated about 216.9 light-years (66.5 pc) away from our Solar System.
  • The star eta2 Hyi 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 eta2 Hyi b radius 1.049869 mass 6.290000 orbital distance 1.890000
    (Illustration of the eta2 Hyi's Planetary System)



    The Star eta2 Hyi '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 eta2 Hyi)



    Kopparapu's Recent Venus for Star eta2 Hyi distance : 7.549 AU
    Kopparapu's Runaway Greenhouse for Earth-sized planet for Star eta2 Hyi distance : 9.558 AU
    Kopparapu's Runaway Greenhouse for Super-Earth-sized planet for Star eta2 Hyi distance : 9.232 AU
    Kopparapu's Runaway Greenhouse for Mars-sized planet for Star eta2 Hyi distance : 10.125 AU
    Kopparapu's Outer Boundary for Maximum Greenhouse for Star eta2 Hyi distance : 17.342 AU
    Kopparapu's Outer Boundary for Early Mars for Star eta2 Hyi distance : 18.292 AU
    (Habitable zone calculated based on Kopparapu et al.(2013) around the star eta2 Hyi)



  • Original Kopparapu Recent Venus for Star eta2 Hyi distance : 7.468 AU
  • Original Kopparapu Runaway Greenhouse for Star eta2 Hyi distance : 9.851 AU
  • Original Kopparapu Moist Greenhouse for Star eta2 Hyi distance : 9.882 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star eta2 Hyi distance : 17.632 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star eta2 Hyi distance : 18.337 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star eta2 Hyi)



    (Position in Stellar Map of star eta2 Hyi )



    (Zoomed position in Stellar Map of star eta2 Hyi (zoom level 3))

    (Synthetic Spectrum of star K2-362*)
    *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