Imaginary Picture of Kepler-259 b

Display orbital revolution of Kepler-259 b around the hoststar Kepler-259
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Exoplanet Name : Kepler-259 b
Alternate Name : "2MASS J19125086+4636540 b, K00954.01, KIC 9823457 b, KOI-954 b, KOI-954.01, WISE J191250.86+463654.1 b"
Status : Confirmed
Radius (Rjup / Re): 0.2500 (Rjup) 2.8022 (Rearth)
Mass (Mjup / Me): 0.0216 (Mjup) 6.8785 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0790 (AU) 0.0790 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0222
Orbital Period(Observed/Estimated) 8.12 (Days Obs.) 8.07 (Days Est.)
Surface Gravity (G Earth) 0.8760
Star Radiation at Atmospheric Boundary: 153074.7 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 882.8 (K)
Blackbody T 0.3(K) 829.1 (K)
Blackbody T 0.7(K) 670.8 (K)
Tidally Locked Blackbody T 0.1(K) 1049.8 (K)
Tidally Locked Blackbody T 0.3(K) 985.9 (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-259
Alternate Name : "2MASS J19125086+4636540, KIC 9823457, KOI-954, WISE J191250.86+463654.1"
Star Distance(LY) : 3270.1
Stellar Radius(Rsun) : 0.9 (Rsun Measured)
Stellar Mass(Msun) : 1.0 (Msun Measured) 1.0 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5511 (K)
Spectral type : G1
UV portion[%]: 6.9
Visible portion[%]: 43.3
IR portion[%]: 49.8
Metalicity : -0.2
Absolute Magnitude: 4.0
Apparent Magnitude: 14.0
Right Ascension(RA) 288.2119
Declination (DEC) 46.6150
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors 0
Discovery Paper - Title
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Kepler-259+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-259%20b/
Kepler-259 b
Kepler-259 b
  • Kepler-259 b is an exoplanet orbiting the star Kepler-259, located about 3270.1 light-years (1002.6 pc) away from Solar System. Its discovery was publicly announced on 2014.
  • The host star Kepler-259 has apparent magnitude of 14.0, with absolute magnitude of 4.0.
  • 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 G1
  • In this planetary system, the extrasolar planet Kepler-259 b orbits around the star Kepler-259 every 8.1 days with its orbital distance of 0.08 AU ( 11818231.8 km)
    • (Projected orbit of Kepler-259 b around its host star Kepler-259)


  • The Star Kepler-259 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.605 AU ( 90455389.1 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.836 AU ( 125032986.5 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.274 AU ( 190522601.7 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.874 AU ( 280362354.6 km)
  • Radiation at Planetary Boundary of Kepler-259 b : 153074.66 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-259)



  • Kopparapu Recent Venus for Star Kepler-259 distance : 0.637 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-259 distance : 0.806 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-259 distance : 0.779 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-259 distance : 0.854 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-259 distance : 1.435 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-259 distance : 1.513 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-259)



  • Original Kopparapu Recent Venus for Star Kepler-259 distance : 0.634 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-259 distance : 0.829 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-259 distance : 0.839 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-259 distance : 1.460 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-259 distance : 1.518 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-259)



    (Position in Stellar Map of star Kepler-259 and its Exoplanet Kepler-259 b)



    (Zoomed position in Stellar Map of star Kepler-259 and its Exoplanet Kepler-259 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-259*)
    *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