XO-4

Display orbital revolution around the star XO-4
Imaginary Picture of Star XO-4
Star Name : XO-4
Alternate Name :
Star Distance (LY/pc): 840.6082 (LY) 257.7320 (pc)
Stellar Radius (Rsun): 0.0000 (Rsun, measured) 1.5500 (Rsun, estimated)
Stellar Mass (Msun): 1.3200 (Msun/observed) 1.3200 (Msun/estimated)
Spectral type : F5V
Metalicity : -0.0400
Absolute Magnitude : 3.64
Apparent Magnitude : 10.70
Right Ascension(RA) : 110.38817
Declination(DEC) : 58.26806
  • This is the XO-4 . The star XO-4 islocated about 840.6 light-years (257.7 pc) away from our Solar System.
  • The star XO-4 has apparent magnitude of 10.7, with absolute magnitude of 3.6.
  • It is 1.3 times more massive and 1.6 times bigger compared with our Sun. The surface temperature is 5700 with its spectral types of F5V
  • Number of Extrasolar Planets : 1
  • Name of the 1 Planet XO-4 b radius 1.317000 mass 1.616000 orbital distance 0.054850
    (Illustration of the XO-4's Planetary System)



    The Star XO-4 's habitable zone is located at the following distance

    Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.091 AU ( 163207278.1 km)
    Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.508 AU ( 225595109.6 km)
    Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.298 AU ( 343757022.9 km)
    Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 3.381 AU ( 505853518.2 km)
    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star XO-4)



    Kopparapu's Recent Venus for Star XO-4 distance : 1.136 AU
    Kopparapu's Runaway Greenhouse for Earth-sized planet for Star XO-4 distance : 1.439 AU
    Kopparapu's Runaway Greenhouse for Super-Earth-sized planet for Star XO-4 distance : 1.389 AU
    Kopparapu's Runaway Greenhouse for Mars-sized planet for Star XO-4 distance : 1.523 AU
    Kopparapu's Outer Boundary for Maximum Greenhouse for Star XO-4 distance : 2.546 AU
    Kopparapu's Outer Boundary for Early Mars for Star XO-4 distance : 2.685 AU
    (Habitable zone calculated based on Kopparapu et al.(2013) around the star XO-4)



  • Original Kopparapu Recent Venus for Star XO-4 distance : 1.136 AU
  • Original Kopparapu Runaway Greenhouse for Star XO-4 distance : 1.479 AU
  • Original Kopparapu Moist Greenhouse for Star XO-4 distance : 1.503 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star XO-4 distance : 2.590 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star XO-4 distance : 2.694 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star XO-4)



    (Position in Stellar Map of star XO-4 )



    (Zoomed position in Stellar Map of star XO-4 (zoom level 3))

    (Synthetic Spectrum of star K2-164*)
    *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