Imaginary Picture of Kepler-1209 b

Display orbital revolution of Kepler-1209 b around the hoststar Kepler-1209
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Exoplanet Name : Kepler-1209 b
Alternate Name : "2MASS J19102037+4909172 b, K02366.01, KIC 11342416 b, KOI-2366 b, KOI-2366.01, WISE J191020.37+490917.1 b"
Status : Confirmed
Radius (Rjup / Re): 0.1350 (Rjup) 1.5132 (Rearth)
Mass (Mjup / Me): 0.0138 (Mjup) 4.3954 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.1810 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0695
Orbital Period(Observed/Estimated) 25.37 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 1.9195
Star Radiation at Atmospheric Boundary: 85379.8 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 762.9 (K)
Blackbody T 0.3(K) 716.5 (K)
Blackbody T 0.7(K) 579.7 (K)
Tidally Locked Blackbody T 0.1(K) 907.3 (K)
Tidally Locked Blackbody T 0.3(K) 852.0 (K)
Size Class: super-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 : Kepler-1209
Alternate Name : "2MASS J19102037+4909172, KIC 11342416, KOI-2366, WISE J191020.37+490917.1"
Star Distance(LY) : 1648.7
Stellar Radius(Rsun) : 1.3 (Rsun Measured)
Stellar Mass(Msun) : 1.2 (Msun Measured) 1.2 (Msun Estimated)
Star Age : 3.1 (GY)
Temperature : 6150 (K)
Spectral type : F8
UV portion[%]: 7.8
Visible portion[%]: 44.8
IR portion[%]: 47.4
Metalicity : 0.1
Absolute Magnitude: 3.0
Apparent Magnitude: 11.5
Right Ascension(RA) 287.5849
Declination (DEC) 49.1548
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors "Timothy D. Morton1, Stephen T. Bryson2, Jeffrey L. Coughlin2,3, Jason F. Rowe4, Ganesh Ravichandran5, Erik A. Petigura6,7, Michael R. Haas2, and Natalie M. Batalha7"
Discovery Paper - Title FALSE POSITIVE PROBABILITIES FOR ALL KEPLER OBJECTS OF INTEREST: 1284 NEWLY VALIDATED PLANETS AND 433 LIKELY FALSE POSITIVES
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Kepler-1209+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-1209%20b/
Kepler-1209 b
Kepler-1209 b

  • Kepler-1209 b is an exoplanet orbiting the star Kepler-1209, located about 1648.7 light-years (505.5 pc) away from Solar System. Its discovery was publicly announced on 2016.
  • The host star Kepler-1209 has apparent magnitude of 11.5, with absolute magnitude of 3.0.
  • It is 1.2 times more massive and 1.3 times bigger compared with our Sun. The surface temperature is 6150 with its spectral types of F8
  • In this planetary system, the extrasolar planet Kepler-1209 b orbits around the star Kepler-1209 every 25.4 days with its orbital distance of 0.18 AU ( 27083441.9 km)
  • (Projected orbit of Kepler-1209 b around its host star Kepler-1209)


  • The Star Kepler-1209 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.035 AU ( 154814521.4 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.430 AU ( 213994126.5 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.180 AU ( 326079691.9 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 3.208 AU ( 479840551.3 km)
  • Radiation at Planetary Boundary of Kepler-1209 b : 85379.79 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-1209)



  • Kopparapu Recent Venus for Star Kepler-1209 distance : 1.049 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-1209 distance : 1.328 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-1209 distance : 1.282 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-1209 distance : 1.406 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1209 distance : 2.325 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-1209 distance : 2.452 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-1209)



  • Original Kopparapu Recent Venus for Star Kepler-1209 distance : 1.058 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-1209 distance : 1.363 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-1209 distance : 1.400 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1209 distance : 2.366 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-1209 distance : 2.461 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-1209)



    (Position in Stellar Map of star Kepler-1209 and its Exoplanet Kepler-1209 b)



    (Zoomed position in Stellar Map of star Kepler-1209 and its Exoplanet Kepler-1209 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-1209*)
    *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