Imaginary Picture of Kepler-263 b

Display orbital revolution of Kepler-263 b around the hoststar Kepler-263
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Exoplanet Name : Kepler-263 b
Alternate Name : "2MASS J19295274+3734040 b, K00999.01, KIC 2165002 b, KOI-999 b, KOI-999.01, WISE J192952.76+373404.1 b"
Status : Confirmed
Radius (Rjup / Re): 0.2380 (Rjup) 2.6677 (Rearth)
Mass (Mjup / Me): 0.0207 (Mjup) 6.5709 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.1200 (AU) 0.1200 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0454
Orbital Period(Observed/Estimated) 16.57 (Days Obs.) 24.96 (Days Est.)
Surface Gravity (G Earth) 0.9233
Star Radiation at Atmospheric Boundary: 30762.0 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 591.1 (K)
Blackbody T 0.3(K) 555.1 (K)
Blackbody T 0.7(K) 449.1 (K)
Tidally Locked Blackbody T 0.1(K) 702.9 (K)
Tidally Locked Blackbody T 0.3(K) 660.1 (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-263
Alternate Name : "2MASS J19295274+3734040, KIC 2165002, KOI-999, WISE J192952.76+373404.1"
Star Distance(LY) : 2461.6
Stellar Radius(Rsun) : 0.7 (Rsun Measured)
Stellar Mass(Msun) : 0.4 (Msun Measured) 0.8 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5113 (K)
Spectral type : K0
UV portion[%]: 5.5
Visible portion[%]: 41.0
IR portion[%]: 53.4
Metalicity : -0.1
Absolute Magnitude: 4.6
Apparent Magnitude: 14.0
Right Ascension(RA) 292.4698
Declination (DEC) 37.5678
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-263+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-263%20b/
Kepler-263 b
Kepler-263 b

  • Kepler-263 b is an exoplanet orbiting the star Kepler-263, located about 2461.6 light-years (754.7 pc) away from Solar System. Its discovery was publicly announced on 2014.
  • The host star Kepler-263 has apparent magnitude of 14.0, with absolute magnitude of 4.6.
  • It is 0.4 times more massive and 0.7 times bigger compared with our Sun. The surface temperature is 5113 with its spectral types of K0
  • In this planetary system, the extrasolar planet Kepler-263 b orbits around the star Kepler-263 every 16.6 days with its orbital distance of 0.12 AU ( 17951744.5 km)
  • (Projected orbit of Kepler-263 b around its host star Kepler-263)


  • The Star Kepler-263 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.412 AU ( 61594808.4 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.569 AU ( 85140121.9 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.867 AU ( 129734704.3 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.276 AU ( 190910300.7 km)
  • Radiation at Planetary Boundary of Kepler-263 b : 30761.98 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-263)



  • Kopparapu Recent Venus for Star Kepler-263 distance : 0.443 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-263 distance : 0.561 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-263 distance : 0.542 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-263 distance : 0.594 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-263 distance : 1.012 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-263 distance : 1.067 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-263)



  • Original Kopparapu Recent Venus for Star Kepler-263 distance : 0.439 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-263 distance : 0.578 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-263 distance : 0.581 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-263 distance : 1.029 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-263 distance : 1.070 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-263)



    (Position in Stellar Map of star Kepler-263 and its Exoplanet Kepler-263 b)



    (Zoomed position in Stellar Map of star Kepler-263 and its Exoplanet Kepler-263 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-263*)
    *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