Imaginary Picture of Kepler-858 b

Display orbital revolution of Kepler-858 b around the hoststar Kepler-858
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Exoplanet Name : Kepler-858 b
Alternate Name : "2MASS J19152367+5112325 b, K01478.01, KIC 12403119 b, KOI-1478 b, KOI-1478.01, WISE J191523.70+511232.5 b"
Status : Confirmed
Radius (Rjup / Re): 0.4340 (Rjup) 4.8647 (Rearth)
Mass (Mjup / Me): 0.0801 (Mjup) 25.4765 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.3468 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.2084
Orbital Period(Observed/Estimated) 76.14 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 1.0765
Star Radiation at Atmospheric Boundary: 8327.7 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 426.4 (K)
Blackbody T 0.3(K) 400.4 (K)
Blackbody T 0.7(K) 324.0 (K)
Tidally Locked Blackbody T 0.1(K) 507.0 (K)
Tidally Locked Blackbody T 0.3(K) 476.2 (K)
Size Class: 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-858
Alternate Name : "2MASS J19152367+5112325, KIC 12403119, KOI-1478, WISE J191523.70+511232.5"
Star Distance(LY) : 973.4
Stellar Radius(Rsun) : 0.9 (Rsun Measured)
Stellar Mass(Msun) : 1.0 (Msun Measured) 1.0 (Msun Estimated)
Star Age : 3.4 (GY)
Temperature : 5511 (K)
Spectral type : G5
UV portion[%]: 7.4
Visible portion[%]: 44.2
IR portion[%]: 48.4
Metalicity : -0.0
Absolute Magnitude: 3.9
Apparent Magnitude: 11.3
Right Ascension(RA) 288.8486
Declination (DEC) 51.2090
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 720 LIKELY FALSE POSITIVES
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-858%20b/
Kepler-858 b
Kepler-858 b

  • Kepler-858 b is an exoplanet orbiting the star Kepler-858, located about 973.4 light-years (298.5 pc) away from Solar System. Its discovery was publicly announced on 2016.
  • The host star Kepler-858 has apparent magnitude of 11.3, with absolute magnitude of 3.9.
  • It is 1.0 times more massive and 0.9 times bigger compared with our Sun. The surface temperature is 5511 with its spectral types of G5
  • In this planetary system, the extrasolar planet Kepler-858 b orbits around the star Kepler-858 every 76.1 days with its orbital distance of 0.35 AU ( 51881889.9 km)
  • (Projected orbit of Kepler-858 b around its host star Kepler-858)


  • The Star Kepler-858 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.619 AU ( 92620806.4 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.856 AU ( 128026159.2 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.304 AU ( 195083534.5 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.919 AU ( 287073967.0 km)
  • Radiation at Planetary Boundary of Kepler-858 b : 8327.70 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-858)



  • Kopparapu Recent Venus for Star Kepler-858 distance : 0.652 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-858 distance : 0.825 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-858 distance : 0.797 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-858 distance : 0.874 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-858 distance : 1.469 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-858 distance : 1.549 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-858)



  • Original Kopparapu Recent Venus for Star Kepler-858 distance : 0.649 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-858 distance : 0.849 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-858 distance : 0.859 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-858 distance : 1.494 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-858 distance : 1.554 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-858)



    (Position in Stellar Map of star Kepler-858 and its Exoplanet Kepler-858 b)



    (Zoomed position in Stellar Map of star Kepler-858 and its Exoplanet Kepler-858 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-858*)
    *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