Imaginary Picture of beta Umi b

Display orbital revolution of beta Umi b around the hoststar beta Umi
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Exoplanet Name : beta Umi b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 6.1000 (Mjup) 1939.4218 (Mearth)
Semi Major Axis / Orbital Distance Calculated 1.4000 (AU) 1.4000 (AU Est.)
Eccentricity : 0.1900
Orbital Period(Yrs) 1.4299
Orbital Period(Observed/Estimated) 522.30 (Days Obs.) 511.35 (Days Est.)
Surface Gravity (G Earth) 18.7296
Star Radiation at Atmospheric Boundary: 320777.7 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1062.2 (K)
Blackbody T 0.3(K) 997.5 (K)
Blackbody T 0.7(K) 807.1 (K)
Tidally Locked Blackbody T 0.1(K) 1263.1 (K)
Tidally Locked Blackbody T 0.3(K) 1186.2 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Radial Velocity
Mass Detection :
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : beta Umi
Alternate Name :
Star Distance(LY) : 130.9
Stellar Radius(Rsun) : 42.1 (Rsun Measured)
Stellar Mass(Msun) : 1.4 (Msun Measured) 1.3 (Msun Estimated)
Star Age : 3.0 (GY)
Temperature : 4126 (K)
Spectral type : K4III
UV portion[%]: 0.8
Visible portion[%]: 25.7
IR portion[%]: 73.6
Metalicity : -0.3
Absolute Magnitude: -0.9
Apparent Magnitude: 2.1
Right Ascension(RA) 222.6764
Declination (DEC) 74.1556
Hubble Space Telescope Guide Star Catalog (GSC) ID 04416-01799
Discovered by
Discovery Paper - Authors 0
Discovery Paper - Title 0
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=beta+Umi+&submit=SIMBAD+search
Open Exoplanet Database Link 0
beta Umi b
beta Umi b

  • beta Umi b is an exoplanet orbiting the star beta Umi, located about 130.9 light-years (40.1 pc) away from Solar System. Its discovery was publicly announced on 2014.
  • The host star beta Umi has apparent magnitude of 2.1, with absolute magnitude of -0.9.
  • It is 1.4 times more massive and 42.1 times bigger compared with our Sun. The surface temperature is 4126 with its spectral types of K4III
  • In this planetary system, the extrasolar planet beta Umi b orbits around the star beta Umi every 522.3 days with its orbital distance of 1.40 AU ( 209437019.0 km)
  • (Projected orbit of beta Umi b around its host star beta Umi)


  • The Star beta Umi 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 15.512 AU ( 2320522737.0 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 21.441 AU ( 3207568847.6 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 32.672 AU ( 4887625090.3 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 48.078 AU ( 7192354433.5 km)
  • Radiation at Planetary Boundary of beta Umi b : 320777.70 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star beta Umi)



  • Kopparapu Recent Venus for Star beta Umi distance : 17.326 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star beta Umi distance : 21.931 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star beta Umi distance : 21.181 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star beta Umi distance : 23.277 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star beta Umi distance : 41.360 AU
  • Kopparapu Outer Boundary for Early Mars for Star beta Umi distance : 43.632 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star beta Umi)



  • Original Kopparapu Recent Venus for Star beta Umi distance : 17.105 AU
  • Original Kopparapu Runaway Greenhouse for Star beta Umi distance : 22.669 AU
  • Original Kopparapu Moist Greenhouse for Star beta Umi distance : 22.633 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star beta Umi distance : 42.024 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star beta Umi distance : 43.704 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star beta Umi)



    (Position in Stellar Map of star beta Umi and its Exoplanet beta Umi b)



    (Zoomed position in Stellar Map of star beta Umi and its Exoplanet beta Umi b (zoom level 3))

    (Synthetic Spectrum of star beta Umi*)
    *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