Imaginary Picture of Kepler-1646 b

Display orbital revolution of Kepler-1646 b around the hoststar Kepler-1646
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Exoplanet Name : Kepler-1646 b
Alternate Name : "2MASS J19100633+4254464 b, K06863.01, KIC 7350067 b, KOI-6863 b, KOI-6863.01"
Status : Confirmed
Radius (Rjup / Re): 0.1100 (Rjup) 1.2330 (Rearth)
Mass (Mjup / Me): 0.0065 (Mjup) 2.0811 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.0331 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0123
Orbital Period(Observed/Estimated) 4.49 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 1.3689
Star Radiation at Atmospheric Boundary: 16999.3 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 509.6 (K)
Blackbody T 0.3(K) 478.6 (K)
Blackbody T 0.7(K) 387.2 (K)
Tidally Locked Blackbody T 0.1(K) 606.0 (K)
Tidally Locked Blackbody T 0.3(K) 569.1 (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-1646
Alternate Name : "2MASS J19100633+4254464, KIC 7350067, KOI-6863"
Star Distance(LY) : 416.1
Stellar Radius(Rsun) : 0.4 (Rsun Measured)
Stellar Mass(Msun) : 0.2 (Msun Measured) 0.2 (Msun Estimated)
Star Age : 4.7 (GY)
Temperature : 3227 (K)
Spectral type : M6
UV portion[%]: 0.2
Visible portion[%]: 11.2
IR portion[%]: 88.7
Metalicity : 0.0
Absolute Magnitude: 7.3
Apparent Magnitude: 12.9
Right Ascension(RA) 287.5264
Declination (DEC) 42.9129
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-1646&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-1646%20b/
Kepler-1646 b
Kepler-1646 b

  • Kepler-1646 b is an exoplanet orbiting the star Kepler-1646, located about 416.1 light-years (127.6 pc) away from Solar System. Its discovery was publicly announced on 2016.
  • The host star Kepler-1646 has apparent magnitude of 12.9, with absolute magnitude of 7.3.
  • It is 0.2 times more massive and 0.4 times bigger compared with our Sun. The surface temperature is 3227 with its spectral types of M6
  • In this planetary system, the extrasolar planet Kepler-1646 b orbits around the star Kepler-1646 every 4.5 days with its orbital distance of 0.03 AU ( 4948592.1 km)
  • (Projected orbit of Kepler-1646 b around its host star Kepler-1646)


  • The Star Kepler-1646 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.084 AU ( 12621984.6 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.117 AU ( 17446881.2 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.178 AU ( 26585186.0 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.262 AU ( 39121265.8 km)
  • Radiation at Planetary Boundary of Kepler-1646 b : 16999.31 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-1646)



  • Kopparapu Recent Venus for Star Kepler-1646 distance : 0.096 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-1646 distance : 0.121 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-1646 distance : 0.117 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-1646 distance : 0.129 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1646 distance : 0.239 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-1646 distance : 0.252 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-1646)



  • Original Kopparapu Recent Venus for Star Kepler-1646 distance : 0.095 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-1646 distance : 0.125 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-1646 distance : 0.126 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1646 distance : 0.242 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-1646 distance : 0.252 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-1646)



    (Position in Stellar Map of star Kepler-1646 and its Exoplanet Kepler-1646 b)



    (Zoomed position in Stellar Map of star Kepler-1646 and its Exoplanet Kepler-1646 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-1646*)
    *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