Imaginary Picture of beta Cnc b

Display orbital revolution of beta Cnc b around the hoststar beta Cnc
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Exoplanet Name : beta Cnc b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 7.8000 (Mjup) 2479.9164 (Mearth)
Semi Major Axis / Orbital Distance Calculated 1.7000 (AU) 1.7000 (AU Est.)
Eccentricity : 0.0800
Orbital Period(Yrs) 1.6569
Orbital Period(Observed/Estimated) 605.20 (Days Obs.) 620.92 (Days Est.)
Surface Gravity (G Earth) 23.9494
Star Radiation at Atmospheric Boundary: 257799.1 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1005.7 (K)
Blackbody T 0.3(K) 944.4 (K)
Blackbody T 0.7(K) 764.2 (K)
Tidally Locked Blackbody T 0.1(K) 1196.0 (K)
Tidally Locked Blackbody T 0.3(K) 1123.1 (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 Cnc
Alternate Name :
Star Distance(LY) : 303.4
Stellar Radius(Rsun) : 49.0 (Rsun Measured)
Stellar Mass(Msun) : 1.7 (Msun Measured) 1.8 (Msun Estimated)
Star Age : 1.9 (GY)
Temperature : 3990 (K)
Spectral type : K4III
UV portion[%]: 0.7
Visible portion[%]: 23.6
IR portion[%]: 75.7
Metalicity : -0.3
Absolute Magnitude: -1.3
Apparent Magnitude: 3.5
Right Ascension(RA) 124.1288
Declination (DEC) 9.1856
Hubble Space Telescope Guide Star Catalog (GSC) ID 00794-01622
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+Cnc+&submit=SIMBAD+search
Open Exoplanet Database Link 0
beta Cnc b
beta Cnc b

  • beta Cnc b is an exoplanet orbiting the star beta Cnc, located about 303.4 light-years (93.0 pc) away from Solar System. Its discovery was publicly announced on 2014.
  • The host star beta Cnc has apparent magnitude of 3.5, with absolute magnitude of -1.3.
  • It is 1.7 times more massive and 49.0 times bigger compared with our Sun. The surface temperature is 3990 with its spectral types of K4III
  • In this planetary system, the extrasolar planet beta Cnc b orbits around the star beta Cnc every 605.2 days with its orbital distance of 1.70 AU ( 254316380.2 km)
  • (Projected orbit of beta Cnc b around its host star beta Cnc)


  • The Star beta Cnc 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 16.886 AU ( 2526069603.6 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 23.340 AU ( 3491688333.0 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 35.566 AU ( 5320560310.5 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 52.337 AU ( 7829437575.8 km)
  • Radiation at Planetary Boundary of beta Cnc b : 257799.08 W/m2

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



  • Kopparapu Recent Venus for Star beta Cnc distance : 18.922 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star beta Cnc distance : 23.949 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star beta Cnc distance : 23.129 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star beta Cnc distance : 25.424 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star beta Cnc distance : 45.471 AU
  • Kopparapu Outer Boundary for Early Mars for Star beta Cnc distance : 47.970 AU

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



  • Original Kopparapu Recent Venus for Star beta Cnc distance : 18.692 AU
  • Original Kopparapu Runaway Greenhouse for Star beta Cnc distance : 24.765 AU
  • Original Kopparapu Moist Greenhouse for Star beta Cnc distance : 24.733 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star beta Cnc distance : 46.199 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star beta Cnc distance : 48.045 AU

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



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



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

    (Synthetic Spectrum of star beta Cnc*)
    *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