Imaginary Picture of HD 11964 c

Display orbital revolution of HD 11964 c around the hoststar HD 11964
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Exoplanet Name : HD 11964 c
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.2429 (Rjup) 2.7231 (Rearth)
Mass (Mjup / Me): 0.0790 (Mjup) 25.1171 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.2290 (AU) 0.2290 (AU Est.)
Eccentricity : 0.3000
Orbital Period(Yrs) 0.1038
Orbital Period(Observed/Estimated) 37.91 (Days Obs.) 37.74 (Days Est.)
Surface Gravity (G Earth) 3.3872
Star Radiation at Atmospheric Boundary: 84298.9 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 760.5 (K)
Blackbody T 0.3(K) 714.2 (K)
Blackbody T 0.7(K) 577.9 (K)
Tidally Locked Blackbody T 0.1(K) 904.4 (K)
Tidally Locked Blackbody T 0.3(K) 849.3 (K)
Size Class: sub-Neptune-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 : HD 11964
Alternate Name :
Star Distance(LY) : 107.1
Stellar Radius(Rsun) : 2.2 (Rsun Measured)
Stellar Mass(Msun) : 1.1 (Msun Measured) 1.1 (Msun Estimated)
Star Age : 9.6 (GY)
Temperature : 5248 (K)
Spectral type : G5
UV portion[%]: 5.4
Visible portion[%]: 40.8
IR portion[%]: 53.8
Metalicity : 0.2
Absolute Magnitude: 3.8
Apparent Magnitude: 6.4
Right Ascension(RA) 29.2875
Declination (DEC) -10.2422
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors "S. Desidera, M. Barbieri"
Discovery Paper - Title Properties of planets in binary systems. The role of binary separation
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+11964+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/HD%2011964%20A%20c/
HD 11964 c
HD 11964 c

  • HD 11964 c is an exoplanet orbiting the star HD 11964, located about 107.1 light-years (32.9 pc) away from Solar System. Its discovery was publicly announced on 2005.
  • The host star HD 11964 has apparent magnitude of 6.4, with absolute magnitude of 3.8.
  • It is 1.1 times more massive and 2.2 times bigger compared with our Sun. The surface temperature is 5248 with its spectral types of G5
  • In this planetary system, the extrasolar planet HD 11964 c orbits around the star HD 11964 every 37.9 days with its orbital distance of 0.23 AU ( 34257912.4 km)
  • (Projected orbit of HD 11964 c around its host star HD 11964)


  • The Star HD 11964 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.301 AU ( 194581818.9 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.798 AU ( 268962924.1 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.740 AU ( 409839974.9 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 4.031 AU ( 603097477.0 km)
  • Radiation at Planetary Boundary of HD 11964 c : 84298.94 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 11964)



  • Kopparapu Recent Venus for Star HD 11964 distance : 1.390 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 11964 distance : 1.759 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 11964 distance : 1.699 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 11964 distance : 1.864 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 11964 distance : 3.159 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 11964 distance : 3.332 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 11964)



  • Original Kopparapu Recent Venus for Star HD 11964 distance : 1.379 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 11964 distance : 1.811 AU
  • Original Kopparapu Moist Greenhouse for Star HD 11964 distance : 1.825 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 11964 distance : 3.213 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 11964 distance : 3.341 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 11964)



    (Position in Stellar Map of star HD 11964 and its Exoplanet HD 11964 c)



    (Zoomed position in Stellar Map of star HD 11964 and its Exoplanet HD 11964 c (zoom level 3))

    (Synthetic Spectrum of star HD 11964*)
    *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