Imaginary Picture of Kepler-1621 b

Display orbital revolution of Kepler-1621 b around the hoststar Kepler-1621
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Exoplanet Name : Kepler-1621 b
Alternate Name : "2MASS J19502124+4350283 b, K04747.01, KIC 8047428 b, KOI-4747 b, KOI-4747.01, WISE J195021.24+435028.2 b"
Status : Confirmed
Radius (Rjup / Re): 0.1930 (Rjup) 2.1633 (Rearth)
Mass (Mjup / Me): 0.0170 (Mjup) 5.4073 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.4187 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.2526
Orbital Period(Observed/Estimated) 92.26 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 1.1554
Star Radiation at Atmospheric Boundary: 19367.6 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 526.5 (K)
Blackbody T 0.3(K) 494.5 (K)
Blackbody T 0.7(K) 400.1 (K)
Tidally Locked Blackbody T 0.1(K) 626.1 (K)
Tidally Locked Blackbody T 0.3(K) 588.0 (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-1621
Alternate Name : "2MASS J19502124+4350283, KIC 8047428, KOI-4747, WISE J195021.24+435028.2"
Star Distance(LY) : 5327.8
Stellar Radius(Rsun) : 1.4 (Rsun Measured)
Stellar Mass(Msun) : 1.1 (Msun Measured) 1.2 (Msun Estimated)
Star Age : 2.7 (GY)
Temperature : 6087 (K)
Spectral type : G0
UV portion[%]: 0.3
Visible portion[%]: 1.5
IR portion[%]: 98.2
Metalicity : 0.0
Absolute Magnitude: 2.9
Apparent Magnitude: 13.9
Right Ascension(RA) 297.5885
Declination (DEC) 43.8412
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-1621+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-1621%20b/
Kepler-1621 b
Kepler-1621 b

  • Kepler-1621 b is an exoplanet orbiting the star Kepler-1621, located about 5327.8 light-years (1633.5 pc) away from Solar System. Its discovery was publicly announced on 2016.
  • The host star Kepler-1621 has apparent magnitude of 13.9, with absolute magnitude of 2.9.
  • It is 1.1 times more massive and 1.4 times bigger compared with our Sun. The surface temperature is 6087 with its spectral types of G0
  • In this planetary system, the extrasolar planet Kepler-1621 b orbits around the star Kepler-1621 every 92.3 days with its orbital distance of 0.42 AU ( 62630397.0 km)
  • (Projected orbit of Kepler-1621 b around its host star Kepler-1621)


  • The Star Kepler-1621 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.140 AU ( 170511258.7 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.575 AU ( 235691119.5 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.401 AU ( 359141107.7 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 3.533 AU ( 528491873.0 km)
  • Radiation at Planetary Boundary of Kepler-1621 b : 19367.57 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-1621)



  • Kopparapu Recent Venus for Star Kepler-1621 distance : 1.159 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-1621 distance : 1.468 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-1621 distance : 1.418 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-1621 distance : 1.554 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1621 distance : 2.573 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-1621 distance : 2.714 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-1621)



  • Original Kopparapu Recent Venus for Star Kepler-1621 distance : 1.168 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-1621 distance : 1.507 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-1621 distance : 1.546 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1621 distance : 2.619 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-1621 distance : 2.724 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-1621)



    (Position in Stellar Map of star Kepler-1621 and its Exoplanet Kepler-1621 b)



    (Zoomed position in Stellar Map of star Kepler-1621 and its Exoplanet Kepler-1621 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-1621*)
    *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