Imaginary Picture of Kepler-1669 b

Display orbital revolution of Kepler-1669 b around the hoststar Kepler-1669
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Exoplanet Name : Kepler-1669 b
Alternate Name : "2MASS J19494329+3950522 b, K01475.02, KIC 4770365 b, KOI-1475 b, KOI-1475.02, WISE J194943.27+395052.2 b"
Status : Confirmed
Radius (Rjup / Re): 0.2480 (Rjup) 2.7798 (Rearth)
Mass (Mjup / Me): 0.0215 (Mjup) 6.8273 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0729 (AU) 0.0729 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0260
Orbital Period(Observed/Estimated) 9.51 (Days Obs.) 9.52 (Days Est.)
Surface Gravity (G Earth) 0.8835
Star Radiation at Atmospheric Boundary: 36820.8 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 618.3 (K)
Blackbody T 0.3(K) 580.6 (K)
Blackbody T 0.7(K) 469.8 (K)
Tidally Locked Blackbody T 0.1(K) 735.2 (K)
Tidally Locked Blackbody T 0.3(K) 690.5 (K)
Size Class: sub-Neptune-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 : Kepler-1669
Alternate Name : "4770365, 2MASS J19494329+3950522, KIC 4770365, KOI-1475, WISE J194943.27+395052.2"
Star Distance(LY) : 1799.7
Stellar Radius(Rsun) : 0.7 (Rsun Measured)
Stellar Mass(Msun) : 0.6 (Msun Measured) 0.6 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 4218 (K)
Spectral type : K6
UV portion[%]: 0.8
Visible portion[%]: 26.7
IR portion[%]: 72.4
Metalicity : -0.2
Absolute Magnitude: 6.7
Apparent Magnitude: 15.4
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 http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Kepler-1669&submit=SIMBAD+search
Open Exoplanet Database Link
Kepler-1669 b
Kepler-1669 b

  • Kepler-1669 b is an exoplanet orbiting the star Kepler-1669, located about 1799.7 light-years (551.8 pc) away from Solar System. Its discovery was publicly announced on 2020.
  • The host star Kepler-1669 has apparent magnitude of 15.4, with absolute magnitude of 6.7.
  • It is 0.6 times more massive and 0.7 times bigger compared with our Sun. The surface temperature is 4218 with its spectral types of K6
  • In this planetary system, the extrasolar planet Kepler-1669 b orbits around the star Kepler-1669 every 9.5 days with its orbital distance of 0.07 AU ( 10905684.8 km)
  • (Projected orbit of Kepler-1669 b 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 ) : 0.274 AU ( 40938281.9 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.378 AU ( 56587404.0 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.576 AU ( 86226680.9 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.848 AU ( 126886338.4 km)
  • Radiation at Planetary Boundary of Kepler-1669 b : 36820.76 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 : 0.305 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-1669 distance : 0.386 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-1669 distance : 0.373 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-1669 distance : 0.410 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1669 distance : 0.725 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-1669 distance : 0.764 AU

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



  • Original Kopparapu Recent Venus for Star Kepler-1669 distance : 0.301 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-1669 distance : 0.399 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-1669 distance : 0.398 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1669 distance : 0.736 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-1669 distance : 0.766 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 b)



    (Zoomed position in Stellar Map of star Kepler-1669 and its Exoplanet Kepler-1669 b (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