Imaginary Picture of Kepler-899 b

Display orbital revolution of Kepler-899 b around the hoststar Kepler-899
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Exoplanet Name : Kepler-899 b
Alternate Name : "2MASS J19495582+4040508 b, K01585.01, KIC 5470739 b, KOI-1585 b, KOI-1585.01"
Status : Confirmed
Radius (Rjup / Re): 0.2390 (Rjup) 2.6790 (Rearth)
Mass (Mjup / Me): 0.0207 (Mjup) 6.5966 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.1369 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0525
Orbital Period(Observed/Estimated) 19.18 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 0.9192
Star Radiation at Atmospheric Boundary: 87943.8 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 768.6 (K)
Blackbody T 0.3(K) 721.8 (K)
Blackbody T 0.7(K) 584.0 (K)
Tidally Locked Blackbody T 0.1(K) 914.0 (K)
Tidally Locked Blackbody T 0.3(K) 858.4 (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-899
Alternate Name : "2MASS J19495582+4040508, KIC 5470739, KOI-1585"
Star Distance(LY) : 4066.6
Stellar Radius(Rsun) : 1.1 (Rsun Measured)
Stellar Mass(Msun) : 0.9 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 4.1 (GY)
Temperature : 5783 (K)
Spectral type : G6
UV portion[%]: 0.3
Visible portion[%]: 1.5
IR portion[%]: 98.2
Metalicity : -0.1
Absolute Magnitude: 3.6
Apparent Magnitude: 14.1
Right Ascension(RA) 297.4826
Declination (DEC) 40.6808
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 736 LIKELY FALSE POSITIVES
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Kepler-899&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-899%20b/
Kepler-899 b
Kepler-899 b

  • Kepler-899 b is an exoplanet orbiting the star Kepler-899, located about 4066.6 light-years (1246.8 pc) away from Solar System. Its discovery was publicly announced on 2016.
  • The host star Kepler-899 has apparent magnitude of 14.1, with absolute magnitude of 3.6.
  • It is 0.9 times more massive and 1.1 times bigger compared with our Sun. The surface temperature is 5783 with its spectral types of G6
  • In this planetary system, the extrasolar planet Kepler-899 b orbits around the star Kepler-899 every 19.2 days with its orbital distance of 0.14 AU ( 20475864.0 km)
  • (Projected orbit of Kepler-899 b around its host star Kepler-899)


  • The Star Kepler-899 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.794 AU ( 118788678.6 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.098 AU ( 164196997.0 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.672 AU ( 250199886.7 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.461 AU ( 368180093.8 km)
  • Radiation at Planetary Boundary of Kepler-899 b : 87943.76 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-899)



  • Kopparapu Recent Venus for Star Kepler-899 distance : 0.823 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-899 distance : 1.042 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-899 distance : 1.006 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-899 distance : 1.103 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-899 distance : 1.840 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-899 distance : 1.940 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-899)



  • Original Kopparapu Recent Venus for Star Kepler-899 distance : 0.824 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-899 distance : 1.071 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-899 distance : 1.090 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-899 distance : 1.872 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-899 distance : 1.947 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-899)



    (Position in Stellar Map of star Kepler-899 and its Exoplanet Kepler-899 b)



    (Zoomed position in Stellar Map of star Kepler-899 and its Exoplanet Kepler-899 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-899*)
    *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