Imaginary Picture of Kepler-1538 b

Display orbital revolution of Kepler-1538 b around the hoststar Kepler-1538
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Exoplanet Name : Kepler-1538 b
Alternate Name : "2MASS J18532297+4516280 b, K04009.01, KIC 8934103 b, KOI-4009 b, KOI-4009.01, WISE J185322.95+451627.7 b"
Status : Confirmed
Radius (Rjup / Re): 0.2520 (Rjup) 2.8247 (Rearth)
Mass (Mjup / Me): 0.0218 (Mjup) 6.9297 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.6187 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.4795
Orbital Period(Observed/Estimated) 175.14 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 0.8685
Star Radiation at Atmospheric Boundary: 2634.7 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 319.8 (K)
Blackbody T 0.3(K) 300.3 (K)
Blackbody T 0.7(K) 243.0 (K)
Tidally Locked Blackbody T 0.1(K) 380.3 (K)
Tidally Locked Blackbody T 0.3(K) 357.1 (K)
Size Class: sub-Neptune-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-1538
Alternate Name : "2MASS J18532297+4516280, KIC 8934103, KOI-4009, WISE J185322.95+451627.7"
Star Distance(LY) : 3672.3
Stellar Radius(Rsun) : 0.9 (Rsun Measured)
Stellar Mass(Msun) : 1.0 (Msun Measured) 1.0 (Msun Estimated)
Star Age : 4.4 (GY)
Temperature : 5500 (K)
Spectral type : G2
UV portion[%]: 6.9
Visible portion[%]: 43.2
IR portion[%]: 49.9
Metalicity : 0.0
Absolute Magnitude: 3.9
Apparent Magnitude: 14.1
Right Ascension(RA) 283.3457
Declination (DEC) 45.2745
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors "Timothy D. Morton, Stephen T. Bryson, Jeffrey L. Coughlin, Jason F. Rowe, Ganesh Ravichandran, Erik A. Petigura, Michael R. Haas, and Natalie M. Batalha2"
Discovery Paper - Title FALSE POSITIVE PROBABILITIES FOR ALL KEPLER OBJECTS OF INTEREST: 1284 NEWLY VALIDATED PLANETS AND 428 LIKELY FALSE POSITIVES
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Kepler-1538+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-1538%20b/
Kepler-1538 b
Kepler-1538 b

  • Kepler-1538 b is an exoplanet orbiting the star Kepler-1538, located about 3672.3 light-years (1125.9 pc) away from Solar System. Its discovery was publicly announced on 2016.
  • The host star Kepler-1538 has apparent magnitude of 14.1, with absolute magnitude of 3.9.
  • It is 1.0 times more massive and 0.9 times bigger compared with our Sun. The surface temperature is 5500 with its spectral types of G2
  • In this planetary system, the extrasolar planet Kepler-1538 b orbits around the star Kepler-1538 every 175.1 days with its orbital distance of 0.62 AU ( 92554871.4 km)
  • (Projected orbit of Kepler-1538 b around its host star Kepler-1538)


  • The Star Kepler-1538 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.621 AU ( 92937680.4 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.859 AU ( 128464161.8 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.309 AU ( 195750953.5 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.926 AU ( 288056103.4 km)
  • Radiation at Planetary Boundary of Kepler-1538 b : 2634.66 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-1538)



  • Kopparapu Recent Venus for Star Kepler-1538 distance : 0.655 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-1538 distance : 0.829 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-1538 distance : 0.800 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-1538 distance : 0.878 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1538 distance : 1.475 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-1538 distance : 1.556 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-1538)



  • Original Kopparapu Recent Venus for Star Kepler-1538 distance : 0.652 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-1538 distance : 0.853 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-1538 distance : 0.863 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1538 distance : 1.501 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-1538 distance : 1.561 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-1538)



    (Position in Stellar Map of star Kepler-1538 and its Exoplanet Kepler-1538 b)



    (Zoomed position in Stellar Map of star Kepler-1538 and its Exoplanet Kepler-1538 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-1538*)
    *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