Imaginary Picture of nu Oph b

Display orbital revolution of nu Oph b around the hoststar nu Oph
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Exoplanet Name : nu Oph b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 22.2060 (Mjup) 7060.1312 (Mearth)
Semi Major Axis / Orbital Distance Calculated 1.7900 (AU) 1.7900 (AU Est.)
Eccentricity : 0.1240
Orbital Period(Yrs) 1.4516
Orbital Period(Observed/Estimated) 530.21 (Days Obs.) 501.69 (Days Est.)
Surface Gravity (G Earth) 68.1820
Star Radiation at Atmospheric Boundary: 51467.8 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 672.2 (K)
Blackbody T 0.3(K) 631.3 (K)
Blackbody T 0.7(K) 510.8 (K)
Tidally Locked Blackbody T 0.1(K) 799.4 (K)
Tidally Locked Blackbody T 0.3(K) 750.8 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Radial Velocity
Mass Detection : Radial Velocity
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : nu Oph
Alternate Name :
Star Distance(LY) : 150.7
Stellar Radius(Rsun) : 15.1 (Rsun Measured)
Stellar Mass(Msun) : 3.0 (Msun Measured) 2.7 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 4928 (K)
Spectral type : K0III
UV portion[%]: 2.9
Visible portion[%]: 36.4
IR portion[%]: 60.7
Metalicity : 0.1
Absolute Magnitude: 0.0
Apparent Magnitude: 3.3
Right Ascension(RA) 269.7566
Declination (DEC) -9.7736
Hubble Space Telescope Guide Star Catalog (GSC) ID 05678-00956
Discovered by
Discovery Paper - Authors "Sato,un'ei; Omiya,asashi; Harakawa,iroki; Izumiura,ideyuki; Kambe,iji; Takeda,oichi; Yoshida,ichitoshi; Itoh,oichi; Ando,iroyasu; Kokubo,iichiro; Ida,higeru"
Discovery Paper - Title Substellar Companions to Seven Evolved Intermediate-Mass Stars
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=nu+Oph+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/nu%20Oph%20b/
nu Oph b
nu Oph b

  • nu Oph b is an exoplanet orbiting the star nu Oph, located about 150.7 light-years (46.2 pc) away from Solar System. Its discovery was publicly announced on 2004.
  • The host star nu Oph has apparent magnitude of 3.3, with absolute magnitude of 0.0.
  • It is 3.0 times more massive and 15.1 times bigger compared with our Sun. The surface temperature is 4928 with its spectral types of K0III
  • In this planetary system, the extrasolar planet nu Oph b orbits around the star nu Oph every 530.2 days with its orbital distance of 1.79 AU ( 267780188.6 km)
  • (Projected orbit of nu Oph b around its host star nu Oph)


  • The Star nu Oph 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 7.944 AU ( 1188437803.7 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 10.981 AU ( 1642731620.6 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 16.733 AU ( 2503159454.1 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 24.623 AU ( 3683508793.1 km)
  • Radiation at Planetary Boundary of nu Oph b : 51467.78 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star nu Oph)



  • Kopparapu Recent Venus for Star nu Oph distance : 8.623 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star nu Oph distance : 10.917 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star nu Oph distance : 10.545 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star nu Oph distance : 11.573 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star nu Oph distance : 19.845 AU
  • Kopparapu Outer Boundary for Early Mars for Star nu Oph distance : 20.933 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star nu Oph)



  • Original Kopparapu Recent Venus for Star nu Oph distance : 8.526 AU
  • Original Kopparapu Runaway Greenhouse for Star nu Oph distance : 11.253 AU
  • Original Kopparapu Moist Greenhouse for Star nu Oph distance : 11.282 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star nu Oph distance : 20.177 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star nu Oph distance : 20.983 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star nu Oph)



    (Position in Stellar Map of star nu Oph and its Exoplanet nu Oph b)



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

    (Synthetic Spectrum of star nu Oph*)
    *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