Imaginary Picture of Kepler-409 b

Display orbital revolution of Kepler-409 b around the hoststar Kepler-409
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Exoplanet Name : Kepler-409 b
Alternate Name : "2MASS J19344300+4651099 b, K01925.01, KIC 9955598 b, KOI-1925.01, WISE J193443.00+465109.9 b"
Status : Confirmed
Radius (Rjup / Re): 0.1060 (Rjup) 1.1882 (Rearth)
Mass (Mjup / Me): 0.0692 (Mjup) 22.0077 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.3201 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.1888
Orbital Period(Observed/Estimated) 68.96 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 15.5894
Star Radiation at Atmospheric Boundary: 8305.2 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 426.1 (K)
Blackbody T 0.3(K) 400.1 (K)
Blackbody T 0.7(K) 323.7 (K)
Tidally Locked Blackbody T 0.1(K) 506.7 (K)
Tidally Locked Blackbody T 0.3(K) 475.8 (K)
Size Class: Earth-size
Mass Class:
Detection Type : Primary Transit
Mass Detection : Radial Velocity
Radius Detection : Primary Transit
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : Kepler-409
Alternate Name : "KOI-1925, KIC 9955598, 2MASS J19344300+4651099, WISE J193443.00+465109.9"
Star Distance(LY) : 226.3
Stellar Radius(Rsun) : 0.9 (Rsun Measured)
Stellar Mass(Msun) : 0.9 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 6.8 (GY)
Temperature : 5416 (K)
Spectral type : G7
UV portion[%]: 6.5
Visible portion[%]: 42.6
IR portion[%]: 50.9
Metalicity : 0.1
Absolute Magnitude: 5.2
Apparent Magnitude: 9.4
Right Ascension(RA) 293.6792
Declination (DEC) 46.8528
Hubble Space Telescope Guide Star Catalog (GSC) ID 03556-00878
Discovered by
Discovery Paper - Authors "Geoffrey W. Marcy, Howard Isaacson, Andrew W. Howard et al. The Astrophysical Journal, Supplement Series 210:20(70pp) 2014 February, doi:10.1088/0067-0049/210/2/20"
Discovery Paper - Title "Masses, Radii, and Orbits of Small Kepler Planets: The Transition from Gaseous to Rocky Planets"
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Kepler-409+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-409%20b/
Kepler-409 b
Kepler-409 b

  • Kepler-409 b is an exoplanet orbiting the star Kepler-409, located about 226.3 light-years (69.4 pc) away from Solar System. Its discovery was publicly announced on 2014.
  • The host star Kepler-409 has apparent magnitude of 9.4, with absolute magnitude of 5.2.
  • It is 0.9 times more massive and 0.9 times bigger compared with our Sun. The surface temperature is 5416 with its spectral types of G7
  • In this planetary system, the extrasolar planet Kepler-409 b orbits around the star Kepler-409 every 69.0 days with its orbital distance of 0.32 AU ( 47883511.2 km)
  • (Projected orbit of Kepler-409 b around its host star Kepler-409)


  • The Star Kepler-409 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.571 AU ( 85367342.2 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.789 AU ( 117999976.1 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.202 AU ( 179805850.2 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.769 AU ( 264592185.4 km)
  • Radiation at Planetary Boundary of Kepler-409 b : 8305.22 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-409)



  • Kopparapu Recent Venus for Star Kepler-409 distance : 0.604 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-409 distance : 0.765 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-409 distance : 0.739 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-409 distance : 0.810 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-409 distance : 1.365 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-409 distance : 1.440 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-409)



  • Original Kopparapu Recent Venus for Star Kepler-409 distance : 0.601 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-409 distance : 0.787 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-409 distance : 0.795 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-409 distance : 1.389 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-409 distance : 1.444 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-409)



    (Position in Stellar Map of star Kepler-409 and its Exoplanet Kepler-409 b)



    (Zoomed position in Stellar Map of star Kepler-409 and its Exoplanet Kepler-409 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-409*)
    *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