Imaginary Picture of Kepler-1123 b

Display orbital revolution of Kepler-1123 b around the hoststar Kepler-1123
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Exoplanet Name : Kepler-1123 b
Alternate Name : "2MASS J19380424+5040134 b, K02155.01, KIC 12116380 b, KOI-2155 b, KOI-2155.01, WISE J193804.26+504013.1 b"
Status : Confirmed
Radius (Rjup / Re): 0.1490 (Rjup) 1.6701 (Rearth)
Mass (Mjup / Me): 0.0134 (Mjup) 4.2508 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.0508 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0119
Orbital Period(Observed/Estimated) 4.34 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 1.5239
Star Radiation at Atmospheric Boundary: 247915.9 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 995.9 (K)
Blackbody T 0.3(K) 935.3 (K)
Blackbody T 0.7(K) 756.7 (K)
Tidally Locked Blackbody T 0.1(K) 1184.3 (K)
Tidally Locked Blackbody T 0.3(K) 1112.2 (K)
Size Class: super-Earth-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-1123
Alternate Name : "2MASS J19380424+5040134, KIC 12116380, KOI-2155, WISE J193804.26+504013.1"
Star Distance(LY) : 2296.4
Stellar Radius(Rsun) : 0.8 (Rsun Measured)
Stellar Mass(Msun) : 0.9 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 5.1 (GY)
Temperature : 5318 (K)
Spectral type : G7
UV portion[%]: 6.9
Visible portion[%]: 43.2
IR portion[%]: 49.9
Metalicity : 0.1
Absolute Magnitude: 4.3
Apparent Magnitude: 13.5
Right Ascension(RA) 294.5177
Declination (DEC) 50.6704
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. Batalha2"
Discovery Paper - Title FALSE POSITIVE PROBABILITIES FOR ALL KEPLER OBJECTS OF INTEREST: 1284 NEWLY VALIDATED PLANETS AND 428 LIKELY FALSE POSITIVES
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Kepler-1123+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-1123%20b/
Kepler-1123 b
Kepler-1123 b

  • Kepler-1123 b is an exoplanet orbiting the star Kepler-1123, located about 2296.4 light-years (704.1 pc) away from Solar System. Its discovery was publicly announced on 2016.
  • The host star Kepler-1123 has apparent magnitude of 13.5, with absolute magnitude of 4.3.
  • It is 0.9 times more massive and 0.8 times bigger compared with our Sun. The surface temperature is 5318 with its spectral types of G7
  • In this planetary system, the extrasolar planet Kepler-1123 b orbits around the star Kepler-1123 every 4.3 days with its orbital distance of 0.05 AU ( 7602977.0 km)
  • (Projected orbit of Kepler-1123 b around its host star Kepler-1123)


  • The Star Kepler-1123 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.495 AU ( 74057004.1 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.684 AU ( 102366133.1 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.043 AU ( 155983333.3 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.534 AU ( 229536308.1 km)
  • Radiation at Planetary Boundary of Kepler-1123 b : 247915.88 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-1123)



  • Kopparapu Recent Venus for Star Kepler-1123 distance : 0.527 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-1123 distance : 0.667 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-1123 distance : 0.644 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-1123 distance : 0.707 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1123 distance : 1.195 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-1123 distance : 1.260 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-1123)



  • Original Kopparapu Recent Venus for Star Kepler-1123 distance : 0.523 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-1123 distance : 0.687 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-1123 distance : 0.692 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1123 distance : 1.215 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-1123 distance : 1.264 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-1123)



    (Position in Stellar Map of star Kepler-1123 and its Exoplanet Kepler-1123 b)



    (Zoomed position in Stellar Map of star Kepler-1123 and its Exoplanet Kepler-1123 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-1123*)
    *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