Imaginary Picture of Kepler-643 b

Display orbital revolution of Kepler-643 b around the hoststar Kepler-643
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Exoplanet Name : Kepler-643 b
Alternate Name : "2MASS J19211855+4253538 b, K00674.01, KIC 7277317 b, KOI-674 b, KOI-674.01, WISE J192118.54+425353.7 b"
Status : Confirmed
Radius (Rjup / Re): 0.9060 (Rjup) 10.1554 (Rearth)
Mass (Mjup / Me): 0.7290 (Mjup) 231.7693 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.1260 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0447
Orbital Period(Observed/Estimated) 16.34 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 2.2473
Star Radiation at Atmospheric Boundary: 305345.1 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1049.2 (K)
Blackbody T 0.3(K) 985.3 (K)
Blackbody T 0.7(K) 797.2 (K)
Tidally Locked Blackbody T 0.1(K) 1247.7 (K)
Tidally Locked Blackbody T 0.3(K) 1171.7 (K)
Size Class: Jupiter-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-643
Alternate Name : "2MASS J19211855+4253538, KIC 7277317, KOI-674, WISE J192118.54+425353.7"
Star Distance(LY) : 3467.0
Stellar Radius(Rsun) : 2.6 (Rsun Measured)
Stellar Mass(Msun) : 1.0 (Msun Measured) 1.0 (Msun Estimated)
Star Age : 12.0 (GY)
Temperature : 4933 (K)
Spectral type : K2
UV portion[%]: 2.9
Visible portion[%]: 36.4
IR portion[%]: 60.7
Metalicity : 0.1
Absolute Magnitude: 2.1
Apparent Magnitude: 12.2
Right Ascension(RA) 290.3273
Declination (DEC) 42.8983
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. Batalha"
Discovery Paper - Title FALSE POSITIVE PROBABILITIES FOR ALL KEPLER OBJECTS OF INTEREST: 1284 NEWLY VALIDATED PLANETS AND 556 LIKELY FALSE POSITIVES
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Kepler-643+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-643%20b/
Kepler-643 b
Kepler-643 b

  • Kepler-643 b is an exoplanet orbiting the star Kepler-643, located about 3467.0 light-years (1063.0 pc) away from Solar System. Its discovery was publicly announced on 2016.
  • The host star Kepler-643 has apparent magnitude of 12.2, with absolute magnitude of 2.1.
  • It is 1.0 times more massive and 2.6 times bigger compared with our Sun. The surface temperature is 4933 with its spectral types of K2
  • In this planetary system, the extrasolar planet Kepler-643 b orbits around the star Kepler-643 every 16.3 days with its orbital distance of 0.13 AU ( 18851550.4 km)
  • (Projected orbit of Kepler-643 b around its host star Kepler-643)


  • The Star Kepler-643 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.362 AU ( 203785299.8 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.883 AU ( 281684539.8 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.869 AU ( 429224902.0 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 4.222 AU ( 631623246.5 km)
  • Radiation at Planetary Boundary of Kepler-643 b : 305345.11 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-643)



  • Kopparapu Recent Venus for Star Kepler-643 distance : 1.478 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-643 distance : 1.872 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-643 distance : 1.808 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-643 distance : 1.984 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-643 distance : 3.401 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-643 distance : 3.588 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-643)



  • Original Kopparapu Recent Venus for Star Kepler-643 distance : 1.462 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-643 distance : 1.929 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-643 distance : 1.934 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-643 distance : 3.458 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-643 distance : 3.596 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-643)



    (Position in Stellar Map of star Kepler-643 and its Exoplanet Kepler-643 b)



    (Zoomed position in Stellar Map of star Kepler-643 and its Exoplanet Kepler-643 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-643*)
    *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