TW Hya

Display orbital revolution around the star TW Hya
Imaginary Picture of Star TW Hya
Star Name : TW Hya
Alternate Name :
Star Distance (LY/pc): 195.6936 (LY) 60.0000 (pc)
Stellar Radius (Rsun): 0.0000 (Rsun, measured) 1.1600 (Rsun, estimated)
Stellar Mass (Msun): 0.8000 (Msun/observed) 0.8000 (Msun/estimated)
Spectral type : K8V
Metalicity : 0.0000
Absolute Magnitude : 7.21
Apparent Magnitude : 11.10
Right Ascension(RA) : 165.46667
Declination(DEC) : -34.70472
  • This is the TW Hya . The star TW Hya islocated about 195.7 light-years (60.0 pc) away from our Solar System.
  • The star TW Hya has apparent magnitude of 11.1, with absolute magnitude of 7.2.
  • It is 0.8 times more massive and 1.2 times bigger compared with our Sun. The surface temperature is 4050 with its spectral types of K8V
  • Number of Extrasolar Planets : 1
  • Name of the 1 Planet TW Hya b radius 0.252851 mass 0.094000 orbital distance 0.075000
    (Illustration of the TW Hya's Planetary System)



    The Star TW Hya 's habitable zone is located at the following distance

    Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.412 AU ( 61663212.7 km)
    Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.570 AU ( 85234674.5 km)
    Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.868 AU ( 129878781.5 km)
    Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.278 AU ( 191122316.6 km)
    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star TW Hya)



    Kopparapu's Recent Venus for Star TW Hya distance : 0.461 AU
    Kopparapu's Runaway Greenhouse for Earth-sized planet for Star TW Hya distance : 0.584 AU
    Kopparapu's Runaway Greenhouse for Super-Earth-sized planet for Star TW Hya distance : 0.564 AU
    Kopparapu's Runaway Greenhouse for Mars-sized planet for Star TW Hya distance : 0.618 AU
    Kopparapu's Outer Boundary for Maximum Greenhouse for Star TW Hya distance : 1.105 AU
    Kopparapu's Outer Boundary for Early Mars for Star TW Hya distance : 1.166 AU
    (Habitable zone calculated based on Kopparapu et al.(2013) around the star TW Hya)



  • Original Kopparapu Recent Venus for Star TW Hya distance : 0.456 AU
  • Original Kopparapu Runaway Greenhouse for Star TW Hya distance : 0.604 AU
  • Original Kopparapu Moist Greenhouse for Star TW Hya distance : 0.603 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star TW Hya distance : 1.123 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star TW Hya distance : 1.168 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star TW Hya)



    (Position in Stellar Map of star TW Hya )



    (Zoomed position in Stellar Map of star TW Hya (zoom level 3))

    (Synthetic Spectrum of star K2-138*)
    *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