Imaginary Picture of Kepler-90 i

Display orbital revolution of Kepler-90 i around the hoststar KOI-351
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Exoplanet Name : Kepler-90 i
Alternate Name : "KIC 11442793 i, 2MASS J18574403+4918185 i, KOI-351 i, WISE J185744.03+491818.5 i"
Status : Confirmed
Radius (Rjup / Re): 0.1180 (Rjup) 1.3227 (Rearth)
Mass (Mjup / Me): 0.0084 (Mjup) 2.6861 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.2000 (AU) 0.2000 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0396
Orbital Period(Observed/Estimated) 14.45 (Days Obs.) 29.82 (Days Est.)
Surface Gravity (G Earth) 1.5354
Star Radiation at Atmospheric Boundary: 60328.4 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 699.5 (K)
Blackbody T 0.3(K) 656.9 (K)
Blackbody T 0.7(K) 531.5 (K)
Tidally Locked Blackbody T 0.1(K) 831.8 (K)
Tidally Locked Blackbody T 0.3(K) 781.2 (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 : KOI-351
Alternate Name : "KOI-351, 2MASS J18574403+4918185, KIC 11442793, Kepler-90, WISE J185744.03+491818.5"
Star Distance(LY) : 2835.9
Stellar Radius(Rsun) : 1.2 (Rsun Measured)
Stellar Mass(Msun) : 1.2 (Msun Measured) 5.1 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 6080 (K)
Spectral type : G0
UV portion[%]: 7.8
Visible portion[%]: 44.8
IR portion[%]: 47.4
Metalicity : -0.1
Absolute Magnitude: 4.3
Apparent Magnitude: 14.0
Right Ascension(RA) 284.4335
Declination (DEC) 49.3052
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-90+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-90%20i/
Kepler-90 i
Kepler-90 i

  • Kepler-90 i is an exoplanet orbiting the star KOI-351, located about 2835.9 light-years (869.5 pc) away from Solar System. Its discovery was publicly announced on 2017.
  • The host star KOI-351 has apparent magnitude of 14.0, with absolute magnitude of 4.3.
  • It is 1.2 times more massive and 1.2 times bigger compared with our Sun. The surface temperature is 6080 with its spectral types of G0
  • In this planetary system, the extrasolar planet Kepler-90 i orbits around the star KOI-351 every 14.4 days with its orbital distance of 0.20 AU ( 29919574.1 km)
  • (Projected orbit of Kepler-90 i around its host star KOI-351)


  • The Star KOI-351 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.961 AU ( 143762798.1 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.328 AU ( 198717756.7 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.024 AU ( 302801885.1 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.979 AU ( 445586238.8 km)
  • Radiation at Planetary Boundary of Kepler-90 i : 60328.38 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star KOI-351)



  • Kopparapu Recent Venus for Star KOI-351 distance : 0.978 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star KOI-351 distance : 1.238 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star KOI-351 distance : 1.196 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star KOI-351 distance : 1.311 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star KOI-351 distance : 2.171 AU
  • Kopparapu Outer Boundary for Early Mars for Star KOI-351 distance : 2.290 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star KOI-351)



  • Original Kopparapu Recent Venus for Star KOI-351 distance : 0.985 AU
  • Original Kopparapu Runaway Greenhouse for Star KOI-351 distance : 1.271 AU
  • Original Kopparapu Moist Greenhouse for Star KOI-351 distance : 1.304 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star KOI-351 distance : 2.210 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star KOI-351 distance : 2.298 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star KOI-351)



    (Position in Stellar Map of star KOI-351 and its Exoplanet Kepler-90 i)



    (Zoomed position in Stellar Map of star KOI-351 and its Exoplanet Kepler-90 i (zoom level 3))

    (Synthetic Spectrum of star KOI-351*)
    *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