4 Uma

Display orbital revolution around the star 4 Uma
Imaginary Picture of Star 4 Uma
Star Name : 4 Uma
Alternate Name :
Star Distance (LY/pc): 256.0094 (LY) 78.4929 (pc)
Stellar Radius (Rsun): 0.0000 (Rsun, measured) 1.1581 (Rsun, estimated)
Stellar Mass (Msun): 1.2340 (Msun/observed) 1.2340 (Msun/estimated)
Spectral type : K1III
Metalicity : -0.2500
Absolute Magnitude : 1.32
Apparent Magnitude : 5.79
Right Ascension(RA) : 130.05341
Declination(DEC) : 64.32806
  • This is the 4 Uma . The star 4 Uma islocated about 256.0 light-years (78.5 pc) away from our Solar System.
  • The star 4 Uma has apparent magnitude of 5.8, with absolute magnitude of 1.3.
  • It is 1.2 times more massive and 1.2 times bigger compared with our Sun. The surface temperature is 4415 with its spectral types of K1III
  • Number of Extrasolar Planets : 1
  • Name of the 1 Planet 4 Uma b radius 0.907830 mass 7.100000 orbital distance 0.870000
    (Illustration of the 4 Uma's Planetary System)



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

    Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.489 AU ( 73157123.5 km)
    Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.676 AU ( 101122262.9 km)
    Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.030 AU ( 154087950.4 km)
    Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.516 AU ( 226747169.2 km)
    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star 4 Uma)



    Kopparapu's Recent Venus for Star 4 Uma distance : 0.453 AU
    Kopparapu's Runaway Greenhouse for Earth-sized planet for Star 4 Uma distance : 0.574 AU
    Kopparapu's Runaway Greenhouse for Super-Earth-sized planet for Star 4 Uma distance : 0.554 AU
    Kopparapu's Runaway Greenhouse for Mars-sized planet for Star 4 Uma distance : 0.607 AU
    Kopparapu's Outer Boundary for Maximum Greenhouse for Star 4 Uma distance : 1.067 AU
    Kopparapu's Outer Boundary for Early Mars for Star 4 Uma distance : 1.125 AU
    (Habitable zone calculated based on Kopparapu et al.(2013) around the star 4 Uma)



  • Original Kopparapu Recent Venus for Star 4 Uma distance : 0.447 AU
  • Original Kopparapu Runaway Greenhouse for Star 4 Uma distance : 0.592 AU
  • Original Kopparapu Moist Greenhouse for Star 4 Uma distance : 0.592 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star 4 Uma distance : 1.084 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star 4 Uma distance : 1.128 AU

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



    (Position in Stellar Map of star 4 Uma )



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

    (Synthetic Spectrum of star LSPM J2116+0234*)
    *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