Imaginary Picture of ksi Aql b

Display orbital revolution of ksi Aql b around the hoststar ksi Aql
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Exoplanet Name : ksi Aql b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 2.0200 (Mjup) 642.2348 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.5800 (AU) 0.5800 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.3744
Orbital Period(Observed/Estimated) 136.75 (Days Obs.) 108.77 (Days Est.)
Surface Gravity (G Earth) 6.2023
Star Radiation at Atmospheric Boundary: 274045.6 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1021.2 (K)
Blackbody T 0.3(K) 959.0 (K)
Blackbody T 0.7(K) 775.9 (K)
Tidally Locked Blackbody T 0.1(K) 1214.4 (K)
Tidally Locked Blackbody T 0.3(K) 1140.4 (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 : ksi Aql
Alternate Name : "Libertas, 59 Aql, HD 188310"
Star Distance(LY) : 183.5
Stellar Radius(Rsun) : 12.0 (Rsun Measured)
Stellar Mass(Msun) : 2.2 (Msun Measured) 1.4 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 4780 (K)
Spectral type : G9IIIb
UV portion[%]: 2.4
Visible portion[%]: 35.3
IR portion[%]: 62.3
Metalicity : -0.2
Absolute Magnitude: 1.0
Apparent Magnitude: 4.7
Right Ascension(RA) 298.5620
Declination (DEC) 8.4614
Hubble Space Telescope Guide Star Catalog (GSC) ID 01058-03400
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=ksi+Aql+&submit=SIMBAD+search
Open Exoplanet Database Link 0
ksi Aql b
ksi Aql b

  • ksi Aql b is an exoplanet orbiting the star ksi Aql, located about 183.5 light-years (56.3 pc) away from Solar System. Its discovery was publicly announced on 2008.
  • The host star ksi Aql has apparent magnitude of 4.7, with absolute magnitude of 1.0.
  • It is 2.2 times more massive and 12.0 times bigger compared with our Sun. The surface temperature is 4780 with its spectral types of G9IIIb
  • In this planetary system, the extrasolar planet ksi Aql b orbits around the star ksi Aql every 136.8 days with its orbital distance of 0.58 AU ( 86766765.0 km)
  • (Projected orbit of ksi Aql b around its host star ksi Aql)


  • The Star ksi Aql 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 5.940 AU ( 888577171.9 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 8.210 AU ( 1228245864.5 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 12.511 AU ( 1871574887.3 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 18.410 AU ( 2754104435.0 km)
  • Radiation at Planetary Boundary of ksi Aql b : 274045.64 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star ksi Aql)



  • Kopparapu Recent Venus for Star ksi Aql distance : 6.490 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star ksi Aql distance : 8.216 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star ksi Aql distance : 7.936 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star ksi Aql distance : 8.712 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star ksi Aql distance : 15.028 AU
  • Kopparapu Outer Boundary for Early Mars for Star ksi Aql distance : 15.852 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star ksi Aql)



  • Original Kopparapu Recent Venus for Star ksi Aql distance : 6.410 AU
  • Original Kopparapu Runaway Greenhouse for Star ksi Aql distance : 8.474 AU
  • Original Kopparapu Moist Greenhouse for Star ksi Aql distance : 8.482 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star ksi Aql distance : 15.277 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star ksi Aql distance : 15.888 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star ksi Aql)



    (Position in Stellar Map of star ksi Aql and its Exoplanet ksi Aql b)



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

    (Synthetic Spectrum of star ksi Aql*)
    *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