Imaginary Picture of Kepler-999 b

Display orbital revolution of Kepler-999 b around the hoststar Kepler-999
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Exoplanet Name : Kepler-999 b
Alternate Name : "2MASS J19583851+4611543 b, K01886.01, KIC 9549648 b, KOI-1886 b, KOI-1886.01, WISE J195838.51+461154.4 b"
Status : Confirmed
Radius (Rjup / Re): 0.2090 (Rjup) 2.3427 (Rearth)
Mass (Mjup / Me): 0.0183 (Mjup) 5.8230 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.0703 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0164
Orbital Period(Observed/Estimated) 5.99 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 1.0610
Star Radiation at Atmospheric Boundary: 949151.9 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1393.1 (K)
Blackbody T 0.3(K) 1308.2 (K)
Blackbody T 0.7(K) 1058.5 (K)
Tidally Locked Blackbody T 0.1(K) 1656.7 (K)
Tidally Locked Blackbody T 0.3(K) 1555.8 (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-999
Alternate Name : "2MASS J19583851+4611543, KIC 9549648, KOI-1886, WISE J195838.51+461154.4"
Star Distance(LY) : 1777.4
Stellar Radius(Rsun) : 1.6 (Rsun Measured)
Stellar Mass(Msun) : 1.3 (Msun Measured) 1.3 (Msun Estimated)
Star Age : 3.1 (GY)
Temperature : 6201 (K)
Spectral type : F8
UV portion[%]: 7.8
Visible portion[%]: 44.8
IR portion[%]: 47.4
Metalicity : 0.1
Absolute Magnitude: 2.5
Apparent Magnitude: 11.2
Right Ascension(RA) 299.6605
Declination (DEC) 46.1984
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 806 LIKELY FALSE POSITIVES
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Kepler-999&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-999%20b/
Kepler-999 b
Kepler-999 b

  • Kepler-999 b is an exoplanet orbiting the star Kepler-999, located about 1777.4 light-years (545.0 pc) away from Solar System. Its discovery was publicly announced on 2016.
  • The host star Kepler-999 has apparent magnitude of 11.2, with absolute magnitude of 2.5.
  • It is 1.3 times more massive and 1.6 times bigger compared with our Sun. The surface temperature is 6201 with its spectral types of F8
  • In this planetary system, the extrasolar planet Kepler-999 b orbits around the star Kepler-999 every 6.0 days with its orbital distance of 0.07 AU ( 10514036.0 km)
  • (Projected orbit of Kepler-999 b around its host star Kepler-999)


  • The Star Kepler-999 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.339 AU ( 200386112.3 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.852 AU ( 276985974.3 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.821 AU ( 422065328.0 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 4.152 AU ( 621087619.7 km)
  • Radiation at Planetary Boundary of Kepler-999 b : 949151.92 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-999)



  • Kopparapu Recent Venus for Star Kepler-999 distance : 1.353 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-999 distance : 1.714 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-999 distance : 1.655 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-999 distance : 1.814 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-999 distance : 2.996 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-999 distance : 3.160 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-999)



  • Original Kopparapu Recent Venus for Star Kepler-999 distance : 1.367 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-999 distance : 1.758 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-999 distance : 1.809 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-999 distance : 3.050 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-999 distance : 3.172 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-999)



    (Position in Stellar Map of star Kepler-999 and its Exoplanet Kepler-999 b)



    (Zoomed position in Stellar Map of star Kepler-999 and its Exoplanet Kepler-999 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-999*)
    *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