Imaginary Picture of Kepler-1669 d

Display orbital revolution of Kepler-1669 d around the hoststar Kepler-1669
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Exoplanet Name : Kepler-1669 d
Alternate Name : "KOI-1475 d, KOI-1475.03"
Status : Confirmed
Radius (Rjup / Re): 0.1430 (Rjup) 1.6029 (Rearth)
Mass (Mjup / Me): 0.0129 (Mjup) 4.0914 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0468 (AU) 0.0468 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0129
Orbital Period(Observed/Estimated) 4.73 (Days Obs.) 4.52 (Days Est.)
Surface Gravity (G Earth) 1.5925
Star Radiation at Atmospheric Boundary: 97857.7 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 789.4 (K)
Blackbody T 0.3(K) 741.3 (K)
Blackbody T 0.7(K) 599.8 (K)
Tidally Locked Blackbody T 0.1(K) 938.7 (K)
Tidally Locked Blackbody T 0.3(K) 881.6 (K)
Size Class: super-Earth-size
Mass Class:
Detection Type : Primary Transit
Mass Detection :
Radius Detection : Primary Transit
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : Kepler-1669
Alternate Name : "4770365, 2MASS J19494329+3950522, KIC 4770365, KOI-1475, WISE J194943.27+395052.2"
Star Distance(LY) : 1772.5
Stellar Radius(Rsun) : 0.7 (Rsun Measured)
Stellar Mass(Msun) : 0.7 (Msun Measured) 0.6 (Msun Estimated)
Star Age : 13.9 (GY)
Temperature : 4303 (K)
Spectral type : K7V
UV portion[%]: 0.9
Visible portion[%]: 27.5
IR portion[%]: 71.6
Metalicity : -0.2
Absolute Magnitude: 7.8
Apparent Magnitude: 16.5
Right Ascension(RA) 297.4304
Declination (DEC) 39.8478
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal
Discovery Paper - URL
SIMBAD LINK
Open Exoplanet Database Link
Kepler-1669 d
Kepler-1669 d

  • Kepler-1669 d is an exoplanet orbiting the star Kepler-1669, located about 1772.5 light-years (543.4 pc) away from Solar System. Its discovery was publicly announced on 2017.
  • The host star Kepler-1669 has apparent magnitude of 16.5, with absolute magnitude of 7.8.
  • It is 0.7 times more massive and 0.7 times bigger compared with our Sun. The surface temperature is 4303 with its spectral types of K7V
  • In this planetary system, the extrasolar planet Kepler-1669 d orbits around the star Kepler-1669 every 4.7 days with its orbital distance of 0.05 AU ( 7001180.3 km)
  • (Projected orbit of Kepler-1669 d around its host star Kepler-1669)


  • The Star Kepler-1669 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.286 AU ( 42844888.4 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.396 AU ( 59222832.5 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.603 AU ( 90242490.8 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.888 AU ( 132795778.5 km)
  • Radiation at Planetary Boundary of Kepler-1669 d : 97857.68 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-1669)



  • Kopparapu Recent Venus for Star Kepler-1669 distance : 0.318 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-1669 distance : 0.403 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-1669 distance : 0.389 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-1669 distance : 0.428 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1669 distance : 0.753 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-1669 distance : 0.795 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-1669)



  • Original Kopparapu Recent Venus for Star Kepler-1669 distance : 0.314 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-1669 distance : 0.416 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-1669 distance : 0.416 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1669 distance : 0.766 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-1669 distance : 0.796 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-1669)



    (Position in Stellar Map of star Kepler-1669 and its Exoplanet Kepler-1669 d)



    (Zoomed position in Stellar Map of star Kepler-1669 and its Exoplanet Kepler-1669 d (zoom level 3))

    (Synthetic Spectrum of star Kepler-1669*)
    *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