Imaginary Picture of beta Cir b
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Exoplanet Name : beta Cir b
Alternate Name :
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 56.0000 (Mjup) 17804.5280 (Mearth)
Semi Major Axis / Orbital Distance Calculated 6656.0000 (AU) 6656.0000 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0000
Orbital Period(Observed/Estimated) 0.00 (Days Obs.) 141671391.26 (Days Est.)
Star Radiation at Atmospheric Boundary: 0.0 (W/m2)
Measured Temperature (K) 2084.0 (K)
Blackbody T 0.1(K) 6.2 (K)
Blackbody T 0.3(K) 5.8 (K)
Blackbody T 0.7(K) 4.7 (K)
Tidally Locked Blackbody T 0.1(K) 7.4 (K)
Tidally Locked Blackbody T 0.3(K) 6.9 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Imaging
Mass Detection : Spectrum
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : beta Cir
Alternate Name :
Star Distance(LY) : 99.7
Stellar Radius(Rsun) : 1.5 (Rsun Estimated)
Stellar Mass(Msun) : 2.0 (Msun Measured) 0.0 (Msun Estimated)
Star Age : 0.4 (GY)
Temperature : 8676 (K)
Spectral type : A3V
Metalicity : 0.0
Absolute Magnitude: 19.6
Apparent Magnitude: 22.0
Right Ascension(RA) 229.3400
Declination (DEC) -58.8011
Hubble Space Telescope Guide Star Catalog (GSC) ID
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+Cir+b&submit=SIMBAD+search
Open Exoplanet Database Link 0
beta Cir b
beta Cir b

  • beta Cir b is an exoplanet orbiting the star beta Cir, located about 99.7 light-years (30.6 pc) away from Solar System. Its discovery was publicly announced on 2015.
  • The host star beta Cir has apparent magnitude of 22.0, with absolute magnitude of 19.6.
  • It is 2.0 times more massive and 1.5 times bigger compared with our Sun. The surface temperature is 8676 with its spectral types of A3V
  • (Projected orbit of beta Cir b around its host star beta Cir)


  • The Star beta Cir 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 2.498 AU ( 373637902.5 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 3.452 AU ( 516465224.5 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 5.261 AU ( 786978708.7 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 7.741 AU ( 1158073645.1 km)
  • Radiation at Planetary Boundary of beta Cir b : 0.00 W/m2

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



  • Kopparapu Recent Venus for Star beta Cir distance : 2.400 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star beta Cir distance : 3.040 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star beta Cir distance : 2.936 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star beta Cir distance : 3.210 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star beta Cir distance : 5.254 AU
  • Kopparapu Outer Boundary for Early Mars for Star beta Cir distance : 5.540 AU

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



  • Original Kopparapu Recent Venus for Star beta Cir distance : 2.473 AU
  • Original Kopparapu Runaway Greenhouse for Star beta Cir distance : 3.096 AU
  • Original Kopparapu Moist Greenhouse for Star beta Cir distance : 3.273 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star beta Cir distance : 5.340 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star beta Cir distance : 5.554 AU

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



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



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