Imaginary Picture of Kepler-1698 b

Display orbital revolution of Kepler-1698 b around the hoststar Kepler-1698
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Exoplanet Name : Kepler-1698 b
Alternate Name : "2MASS J19332279+3915281 b, K03864.01, KIC 4164922 b, KOI-3864 b, KOI-3864.01, WISE J193322.80+391527.9 b"
Status : Confirmed
Radius (Rjup / Re): 0.0960 (Rjup) 1.0761 (Rearth)
Mass (Mjup / Me): 0.0040 (Mjup) 1.2728 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0199 (AU) 0.0199 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0033
Orbital Period(Observed/Estimated) 1.21 (Days Obs.) 1.21 (Days Est.)
Surface Gravity (G Earth) 1.0993
Star Radiation at Atmospheric Boundary: 1013975.1 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1416.3 (K)
Blackbody T 0.3(K) 1330.0 (K)
Blackbody T 0.7(K) 1076.1 (K)
Tidally Locked Blackbody T 0.1(K) 1684.3 (K)
Tidally Locked Blackbody T 0.3(K) 1581.7 (K)
Size Class: 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-1698
Alternate Name : "4164922, 2MASS J19332279+3915281, KIC 4164922, KOI-3864, WISE J193322.80+391527.9"
Star Distance(LY) : 729.9
Stellar Radius(Rsun) : 0.7 (Rsun Measured)
Stellar Mass(Msun) : 0.7 (Msun Measured) 0.7 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 4945 (K)
Spectral type : K2
UV portion[%]: 3.0
Visible portion[%]: 36.5
IR portion[%]: 60.5
Metalicity : -0.2
Absolute Magnitude: 5.9
Apparent Magnitude: 12.6
Right Ascension(RA) 293.3450
Declination (DEC) 39.2578
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-1698+&submit=SIMBAD+search
Open Exoplanet Database Link
Kepler-1698 b
Kepler-1698 b

  • Kepler-1698 b is an exoplanet orbiting the star Kepler-1698, located about 729.9 light-years (223.8 pc) away from Solar System. Its discovery was publicly announced on 2020.
  • The host star Kepler-1698 has apparent magnitude of 12.6, with absolute magnitude of 5.9.
  • It is 0.7 times more massive and 0.7 times bigger compared with our Sun. The surface temperature is 4945 with its spectral types of K2
  • In this planetary system, the extrasolar planet Kepler-1698 b orbits around the star Kepler-1698 every 1.2 days with its orbital distance of 0.02 AU ( 2976997.6 km)
  • (Projected orbit of Kepler-1698 b around its host star Kepler-1698)


  • The Star Kepler-1698 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.392 AU ( 58643843.2 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.542 AU ( 81061116.8 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.826 AU ( 123519203.2 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.215 AU ( 181763918.6 km)
  • Radiation at Planetary Boundary of Kepler-1698 b : 1013975.08 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-1698)



  • Kopparapu Recent Venus for Star Kepler-1698 distance : 0.425 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-1698 distance : 0.538 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-1698 distance : 0.520 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-1698 distance : 0.571 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1698 distance : 0.978 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-1698 distance : 1.031 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-1698)



  • Original Kopparapu Recent Venus for Star Kepler-1698 distance : 0.420 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-1698 distance : 0.555 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-1698 distance : 0.556 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1698 distance : 0.994 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-1698 distance : 1.034 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-1698)



    (Position in Stellar Map of star Kepler-1698 and its Exoplanet Kepler-1698 b)



    (Zoomed position in Stellar Map of star Kepler-1698 and its Exoplanet Kepler-1698 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-1698*)
    *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