Imaginary Picture of Kepler-13 Ab

Display orbital revolution of Kepler-13 Ab around the hoststar Kepler-13 A
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Exoplanet Name : Kepler-13 Ab
Alternate Name : "Kepler-13 b, KOI-13 b, 2MASS J19075308+4652061 b, K00013.01, KIC 9941662 b, WISE J190753.08+465205.8 b, TOI-1161 b, KO
Status : Confirmed
Radius (Rjup / Re): 1.5120 (Rjup) 16.9480 (Rearth)
Mass (Mjup / Me): 9.2800 (Mjup) 2950.4646 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0364 (AU) 0.0364 (AU Est.)
Eccentricity : 0.0006
Orbital Period(Yrs) 0.0048
Orbital Period(Observed/Estimated) 1.76 (Days Obs.) 1.93 (Days Est.)
Surface Gravity (G Earth) 10.2720
Star Radiation at Atmospheric Boundary: 9591967.3 (W/m2)
Measured Temperature (K) 2750.0 (K)
Blackbody T 0.1(K) 2483.8 (K)
Blackbody T 0.3(K) 2332.6 (K)
Blackbody T 0.7(K) 1887.3 (K)
Tidally Locked Blackbody T 0.1(K) 2953.8 (K)
Tidally Locked Blackbody T 0.3(K) 2773.9 (K)
Size Class: Super-Jupiter-size
Mass Class:
Detection Type : Primary Transit
Mass Detection : Spectrum
Radius Detection : Primary Transit
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : Kepler-13 A
Alternate Name : "2MASS J19075308+4652061, KIC 9941662, KOI-13 A, WISE J190753.08+465205.8, BD+46 2629 A, TOI-1161"
Star Distance(LY) : 1353.5
Stellar Radius(Rsun) : 1.7 (Rsun Measured)
Stellar Mass(Msun) : 1.7 (Msun Measured) 2.1 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 7650 (K)
Spectral type : A7
UV portion[%]: 0.3
Visible portion[%]: 1.5
IR portion[%]: 98.2
Metalicity : 0.2
Absolute Magnitude: 1.9
Apparent Magnitude: 10.0
Right Ascension(RA) 286.9712
Declination (DEC) 46.8684
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-13 Ab
Kepler-13 Ab

  • Kepler-13 Ab is an exoplanet orbiting the star Kepler-13 A, located about 1353.5 light-years (415.0 pc) away from Solar System. Its discovery was publicly announced on 2011.
  • The host star Kepler-13 A has apparent magnitude of 10.0, with absolute magnitude of 1.9.
  • It is 1.7 times more massive and 1.7 times bigger compared with our Sun. The surface temperature is 7650 with its spectral types of A7
  • In this planetary system, the extrasolar planet Kepler-13 Ab orbits around the star Kepler-13 A every 1.8 days with its orbital distance of 0.04 AU ( 5446858.5 km)
  • (Projected orbit of Kepler-13 Ab around its host star Kepler-13 A)


  • The Star Kepler-13 A 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 2.206 AU ( 330012379.1 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 3.049 AU ( 456163350.5 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 4.646 AU ( 695091997.4 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 6.837 AU ( 1022858324.3 km)
  • Radiation at Planetary Boundary of Kepler-13 Ab : 9591967.31 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-13 A)



  • Kopparapu Recent Venus for Star Kepler-13 A distance : 2.083 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-13 A distance : 2.639 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-13 A distance : 2.548 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-13 A distance : 2.789 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-13 A distance : 4.549 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-13 A distance : 4.797 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-13 A)



  • Original Kopparapu Recent Venus for Star Kepler-13 A distance : 2.162 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-13 A distance : 2.696 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-13 A distance : 2.861 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-13 A distance : 4.632 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-13 A distance : 4.816 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-13 A)



    (Position in Stellar Map of star Kepler-13 A and its Exoplanet Kepler-13 Ab)



    (Zoomed position in Stellar Map of star Kepler-13 A and its Exoplanet Kepler-13 Ab (zoom level 3))

    (Synthetic Spectrum of star Kepler-13 A*)
    *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