Imaginary Picture of Kepler-1815 b

Display orbital revolution of Kepler-1815 b around the hoststar Kepler-1815
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Exoplanet Name : Kepler-1815 b
Alternate Name : "KOI-2259 b, KOI-2259.01"
Status : Confirmed
Radius (Rjup / Re): 0.2452 (Rjup) 2.7489 (Rearth)
Mass (Mjup / Me): 0.0213 (Mjup) 6.7567 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0984 (AU) 0.0984 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0334
Orbital Period(Observed/Estimated) 12.19 (Days Obs.) 11.16 (Days Est.)
Surface Gravity (G Earth) 0.8941
Star Radiation at Atmospheric Boundary: 131124.9 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 849.3 (K)
Blackbody T 0.3(K) 797.6 (K)
Blackbody T 0.7(K) 645.3 (K)
Tidally Locked Blackbody T 0.1(K) 1010.0 (K)
Tidally Locked Blackbody T 0.3(K) 948.5 (K)
Size Class: sub-Neptune-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-1815
Alternate Name : "KIC 8126558, KOI-2259"
Star Distance(LY) : 3283.2
Stellar Radius(Rsun) : 1.0 (Rsun Measured)
Stellar Mass(Msun) : 1.0 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 13.5 (GY)
Temperature : 5730 (K)
Spectral type : G2V
UV portion[%]: 7.7
Visible portion[%]: 44.5
IR portion[%]: 47.7
Metalicity : -0.1
Absolute Magnitude: 5.6
Apparent Magnitude: 15.6
Right Ascension(RA) 300.1705
Declination (DEC) 43.9850
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-1815 b
Kepler-1815 b

  • Kepler-1815 b is an exoplanet orbiting the star Kepler-1815, located about 3283.2 light-years (1006.6 pc) away from Solar System. Its discovery was publicly announced on 2017.
  • The host star Kepler-1815 has apparent magnitude of 15.6, with absolute magnitude of 5.6.
  • It is 1.0 times more massive and 1.0 times bigger compared with our Sun. The surface temperature is 5730 with its spectral types of G2V
  • In this planetary system, the extrasolar planet Kepler-1815 b orbits around the star Kepler-1815 every 12.2 days with its orbital distance of 0.10 AU ( 14720430.5 km)
  • (Projected orbit of Kepler-1815 b around its host star Kepler-1815)


  • The Star Kepler-1815 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.697 AU ( 104278177.5 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.964 AU ( 144139692.4 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.468 AU ( 219636993.2 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.160 AU ( 323205457.1 km)
  • Radiation at Planetary Boundary of Kepler-1815 b : 131124.93 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-1815)



  • Kopparapu Recent Venus for Star Kepler-1815 distance : 0.725 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-1815 distance : 0.918 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-1815 distance : 0.886 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-1815 distance : 0.972 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1815 distance : 1.622 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-1815 distance : 1.711 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-1815)



  • Original Kopparapu Recent Venus for Star Kepler-1815 distance : 0.725 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-1815 distance : 0.943 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-1815 distance : 0.959 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1815 distance : 1.651 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-1815 distance : 1.717 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-1815)



    (Position in Stellar Map of star Kepler-1815 and its Exoplanet Kepler-1815 b)



    (Zoomed position in Stellar Map of star Kepler-1815 and its Exoplanet Kepler-1815 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-1815*)
    *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