Imaginary Picture of KOI-6664 b

Display orbital revolution of KOI-6664 b around the hoststar 2MASS J19095216+4128178
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Exoplanet Name : KOI-6664 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.0860 (Rjup) 0.9640 (Rearth)
Mass (Mjup / Me): 0.0027 (Mjup) 0.8584 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.1093 (AU) 0.1093 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0404
Orbital Period(Observed/Estimated) 14.76 (Days Obs.) 14.77 (Days Est.)
Surface Gravity (G Earth) 0.9237
Star Radiation at Atmospheric Boundary: 53506.3 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 678.8 (K)
Blackbody T 0.3(K) 637.5 (K)
Blackbody T 0.7(K) 515.8 (K)
Tidally Locked Blackbody T 0.1(K) 807.2 (K)
Tidally Locked Blackbody T 0.3(K) 758.1 (K)
Size Class: Earth-size
Mass Class:
Detection Type : Primary Transit
Mass Detection :
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : 2MASS J19095216+4128178
Alternate Name : 6111011
Star Distance(LY) : 5075.6
Stellar Radius(Rsun) : 0.7 (Rsun Measured)
Stellar Mass(Msun) : 0.8 (Msun Measured) 0.8 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5547 (K)
Spectral type : G6
UV portion[%]: 7.1
Visible portion[%]: 43.5
IR portion[%]: 49.4
Metalicity : -0.5
Absolute Magnitude: 4.4
Apparent Magnitude: 15.3
Right Ascension(RA) 287.4674
Declination (DEC) 41.4716
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal
Discovery Paper - URL
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=2MASS+J19095216%2B4128178&submit=SIMBAD+search
Open Exoplanet Database Link
KOI-6664 b
KOI-6664 b

  • KOI-6664 b is an exoplanet orbiting the star 2MASS J19095216+4128178, located about 5075.6 light-years (1556.2 pc) away from Solar System. Its discovery was publicly announced on 2017.
  • The host star 2MASS J19095216+4128178 has apparent magnitude of 15.3, with absolute magnitude of 4.4.
  • It is 0.8 times more massive and 0.7 times bigger compared with our Sun. The surface temperature is 5547 with its spectral types of G6
  • In this planetary system, the extrasolar planet KOI-6664 b orbits around the star 2MASS J19095216+4128178 every 14.8 days with its orbital distance of 0.11 AU ( 16351047.3 km)
  • (Projected orbit of KOI-6664 b around its host star 2MASS J19095216+4128178)


  • The Star 2MASS J19095216+4128178 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.495 AU ( 73990906.7 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.684 AU ( 102274769.2 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.042 AU ( 155844115.0 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.533 AU ( 229331442.3 km)
  • Radiation at Planetary Boundary of KOI-6664 b : 53506.30 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star 2MASS J19095216+4128178)



  • Kopparapu Recent Venus for Star 2MASS J19095216+4128178 distance : 0.520 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star 2MASS J19095216+4128178 distance : 0.658 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star 2MASS J19095216+4128178 distance : 0.636 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star 2MASS J19095216+4128178 distance : 0.697 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star 2MASS J19095216+4128178 distance : 1.170 AU
  • Kopparapu Outer Boundary for Early Mars for Star 2MASS J19095216+4128178 distance : 1.234 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star 2MASS J19095216+4128178)



  • Original Kopparapu Recent Venus for Star 2MASS J19095216+4128178 distance : 0.518 AU
  • Original Kopparapu Runaway Greenhouse for Star 2MASS J19095216+4128178 distance : 0.677 AU
  • Original Kopparapu Moist Greenhouse for Star 2MASS J19095216+4128178 distance : 0.686 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star 2MASS J19095216+4128178 distance : 1.190 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star 2MASS J19095216+4128178 distance : 1.238 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star 2MASS J19095216+4128178)



    (Position in Stellar Map of star 2MASS J19095216+4128178 and its Exoplanet KOI-6664 b)



    (Zoomed position in Stellar Map of star 2MASS J19095216+4128178 and its Exoplanet KOI-6664 b (zoom level 3))

    (Synthetic Spectrum of star 2MASS J19095216+4128178*)
    *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