Imaginary Picture of Kepler-98 b

Display orbital revolution of Kepler-98 b around the hoststar Kepler-98
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Exoplanet Name : Kepler-98 b
Alternate Name : "2MASS J19023879+3757522 b, K00299.01, KIC 2692377 b, KOI-299 b, KOI-299.01, WISE J190238.80+375752.3 b"
Status : Confirmed
Radius (Rjup / Re): 0.1780 (Rjup) 1.9952 (Rearth)
Mass (Mjup / Me): 0.0110 (Mjup) 3.4973 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.0260 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0042
Orbital Period(Observed/Estimated) 1.54 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 0.8785
Star Radiation at Atmospheric Boundary: 1461726.8 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1551.9 (K)
Blackbody T 0.3(K) 1457.4 (K)
Blackbody T 0.7(K) 1179.2 (K)
Tidally Locked Blackbody T 0.1(K) 1845.5 (K)
Tidally Locked Blackbody T 0.3(K) 1733.1 (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-98
Alternate Name : "Kepler-98, 2MASS J19023879+3757522, KIC 2692377, KOI-299, WISE J190238.80+375752.3"
Star Distance(LY) : 1142.3
Stellar Radius(Rsun) : 0.9 (Rsun Measured)
Stellar Mass(Msun) : 1.0 (Msun Measured) 1.0 (Msun Estimated)
Star Age : 2.8 (GY)
Temperature : 5567 (K)
Spectral type : G7
UV portion[%]: 7.0
Visible portion[%]: 43.5
IR portion[%]: 49.5
Metalicity : 0.2
Absolute Magnitude: 4.0
Apparent Magnitude: 11.7
Right Ascension(RA) 285.6617
Declination (DEC) 37.9645
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-98&submit=SIMBAD+search
Open Exoplanet Database Link
Kepler-98 b
Kepler-98 b

  • Kepler-98 b is an exoplanet orbiting the star Kepler-98, located about 1142.3 light-years (350.2 pc) away from Solar System. Its discovery was publicly announced on 2014.
  • The host star Kepler-98 has apparent magnitude of 11.7, with absolute magnitude of 4.0.
  • It is 1.0 times more massive and 0.9 times bigger compared with our Sun. The surface temperature is 5567 with its spectral types of G7
  • In this planetary system, the extrasolar planet Kepler-98 b orbits around the star Kepler-98 every 1.5 days with its orbital distance of 0.03 AU ( 3894094.5 km)
  • (Projected orbit of Kepler-98 b around its host star Kepler-98)


  • The Star Kepler-98 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.616 AU ( 92102176.0 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.851 AU ( 127309276.4 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.297 AU ( 193991163.7 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.908 AU ( 285466495.6 km)
  • Radiation at Planetary Boundary of Kepler-98 b : 1461726.83 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-98)



  • Kopparapu Recent Venus for Star Kepler-98 distance : 0.646 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-98 distance : 0.818 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-98 distance : 0.790 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-98 distance : 0.867 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-98 distance : 1.454 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-98 distance : 1.533 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-98)



  • Original Kopparapu Recent Venus for Star Kepler-98 distance : 0.644 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-98 distance : 0.841 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-98 distance : 0.853 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-98 distance : 1.479 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-98 distance : 1.538 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-98)



    (Position in Stellar Map of star Kepler-98 and its Exoplanet Kepler-98 b)



    (Zoomed position in Stellar Map of star Kepler-98 and its Exoplanet Kepler-98 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-98*)
    *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