Imaginary Picture of Kepler-1644 b

Display orbital revolution of Kepler-1644 b around the hoststar Kepler-1644
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Exoplanet Name : Kepler-1644 b
Alternate Name : "2MASS J19015401+4802057 b, K06228.01, KIC 10717220 b, KOI-6228 b, KOI-6228.01, WISE J190154.01+480205.5 b"
Status : Confirmed
Radius (Rjup / Re): 0.1680 (Rjup) 1.8831 (Rearth)
Mass (Mjup / Me): 0.0149 (Mjup) 4.7528 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.1437 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0577
Orbital Period(Observed/Estimated) 21.09 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 1.3403
Star Radiation at Atmospheric Boundary: 42626.2 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 641.3 (K)
Blackbody T 0.3(K) 602.2 (K)
Blackbody T 0.7(K) 487.3 (K)
Tidally Locked Blackbody T 0.1(K) 762.6 (K)
Tidally Locked Blackbody T 0.3(K) 716.2 (K)
Size Class: super-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-1644
Alternate Name : "2MASS J19015401+4802057, KIC 10717220, KOI-6228, WISE J190154.01+480205.5"
Star Distance(LY) : 1677.3
Stellar Radius(Rsun) : 0.8 (Rsun Measured)
Stellar Mass(Msun) : 0.9 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 4.3 (GY)
Temperature : 5723 (K)
Spectral type : G7
UV portion[%]: 7.7
Visible portion[%]: 44.5
IR portion[%]: 47.8
Metalicity : -0.1
Absolute Magnitude: 4.4
Apparent Magnitude: 13.0
Right Ascension(RA) 285.4751
Declination (DEC) 48.0349
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-1644&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-1644%20b/
Kepler-1644 b
Kepler-1644 b

  • Kepler-1644 b is an exoplanet orbiting the star Kepler-1644, located about 1677.3 light-years (514.3 pc) away from Solar System. Its discovery was publicly announced on 2016.
  • The host star Kepler-1644 has apparent magnitude of 13.0, with absolute magnitude of 4.4.
  • It is 0.9 times more massive and 0.8 times bigger compared with our Sun. The surface temperature is 5723 with its spectral types of G7
  • In this planetary system, the extrasolar planet Kepler-1644 b orbits around the star Kepler-1644 every 21.1 days with its orbital distance of 0.14 AU ( 21497616.0 km)
  • (Projected orbit of Kepler-1644 b around its host star Kepler-1644)


  • The Star Kepler-1644 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.580 AU ( 86827822.1 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.802 AU ( 120018741.0 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.222 AU ( 182882001.2 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.799 AU ( 269118876.3 km)
  • Radiation at Planetary Boundary of Kepler-1644 b : 42626.20 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-1644)



  • Kopparapu Recent Venus for Star Kepler-1644 distance : 0.604 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-1644 distance : 0.764 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-1644 distance : 0.738 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-1644 distance : 0.809 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1644 distance : 1.352 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-1644 distance : 1.426 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-1644)



  • Original Kopparapu Recent Venus for Star Kepler-1644 distance : 0.604 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-1644 distance : 0.786 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-1644 distance : 0.799 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1644 distance : 1.375 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-1644 distance : 1.430 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-1644)



    (Position in Stellar Map of star Kepler-1644 and its Exoplanet Kepler-1644 b)



    (Zoomed position in Stellar Map of star Kepler-1644 and its Exoplanet Kepler-1644 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-1644*)
    *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