Imaginary Picture of HD 188015 b

Display orbital revolution of HD 188015 b around the hoststar HD 188015
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Exoplanet Name : HD 188015 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 1.2600 (Mjup) 400.6019 (Mearth)
Semi Major Axis / Orbital Distance Calculated 1.1900 (AU) 1.1900 (AU Est.)
Eccentricity : 0.1500
Orbital Period(Yrs) 1.2497
Orbital Period(Observed/Estimated) 456.46 (Days Obs.) 454.15 (Days Est.)
Surface Gravity (G Earth) 3.8687
Star Radiation at Atmospheric Boundary: 972.9 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 249.3 (K)
Blackbody T 0.3(K) 234.1 (K)
Blackbody T 0.7(K) 189.4 (K)
Tidally Locked Blackbody T 0.1(K) 296.4 (K)
Tidally Locked Blackbody T 0.3(K) 278.4 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Radial Velocity
Mass Detection :
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Habitable
Habitability by Kopparapu: Not habitable
Star Name : HD 188015
Alternate Name :
Star Distance(LY) : 185.9
Stellar Radius(Rsun) : 1.1 (Rsun Measured)
Stellar Mass(Msun) : 1.1 (Msun Measured) 1.1 (Msun Estimated)
Star Age : 6.2 (GY)
Temperature : 5520 (K)
Spectral type : G5IV
UV portion[%]: 7.0
Visible portion[%]: 43.4
IR portion[%]: 49.7
Metalicity : 0.3
Absolute Magnitude: 4.4
Apparent Magnitude: 8.2
Right Ascension(RA) 298.0189
Declination (DEC) 28.1003
Hubble Space Telescope Guide Star Catalog (GSC) ID 02148-01948
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 "A&A 462, 345-353 (2007) DOI: 10.1051/0004-6361:20066319"
Discovery Paper - URL http://www.aanda.org/articles/aa/pdf/forth/aa6319-06.pdf
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+188015+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/HD%20188015%20A%20b/
HD 188015 b
HD 188015 b

  • HD 188015 b is an exoplanet orbiting the star HD 188015, located about 185.9 light-years (57.0 pc) away from Solar System. Its discovery was publicly announced on 2004.
  • The host star HD 188015 has apparent magnitude of 8.2, with absolute magnitude of 4.4.
  • It is 1.1 times more massive and 1.1 times bigger compared with our Sun. The surface temperature is 5520 with its spectral types of G5IV
  • In this planetary system, the extrasolar planet HD 188015 b orbits around the star HD 188015 every 456.5 days with its orbital distance of 1.19 AU ( 178021466.1 km)
  • (Projected orbit of HD 188015 b around its host star HD 188015)


  • The Star HD 188015 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.726 AU ( 108624790.8 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.004 AU ( 150147847.9 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.529 AU ( 228792092.6 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.251 AU ( 336677587.0 km)
  • Radiation at Planetary Boundary of HD 188015 b : 972.86 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 188015)



  • Kopparapu Recent Venus for Star HD 188015 distance : 0.764 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 188015 distance : 0.968 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 188015 distance : 0.935 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 188015 distance : 1.025 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 188015 distance : 1.721 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 188015 distance : 1.816 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 188015)



  • Original Kopparapu Recent Venus for Star HD 188015 distance : 0.761 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 188015 distance : 0.995 AU
  • Original Kopparapu Moist Greenhouse for Star HD 188015 distance : 1.008 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 188015 distance : 1.751 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 188015 distance : 1.821 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 188015)



    (Position in Stellar Map of star HD 188015 and its Exoplanet HD 188015 b)



    (Zoomed position in Stellar Map of star HD 188015 and its Exoplanet HD 188015 b (zoom level 3))

    (Synthetic Spectrum of star HD 188015*)
    *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