Imaginary Picture of Kepler-873 b

Display orbital revolution of Kepler-873 b around the hoststar Kepler-873
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Exoplanet Name : Kepler-873 b
Alternate Name : "2MASS J19453677+5116168 b, K01516.01, KIC 12418724 b, KOI-1516 b, KOI-1516.01, WISE J194536.75+511616.6 b"
Status : Confirmed
Radius (Rjup / Re): 0.3350 (Rjup) 3.7550 (Rearth)
Mass (Mjup / Me): 0.0284 (Mjup) 9.0303 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.1552 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0563
Orbital Period(Observed/Estimated) 20.55 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 0.6404
Star Radiation at Atmospheric Boundary: 91700.0 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 776.7 (K)
Blackbody T 0.3(K) 729.4 (K)
Blackbody T 0.7(K) 590.1 (K)
Tidally Locked Blackbody T 0.1(K) 923.6 (K)
Tidally Locked Blackbody T 0.3(K) 867.4 (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-873
Alternate Name : "2MASS J19453677+5116168, KIC 12418724, KOI-1516, WISE J194536.75+511616.6"
Star Distance(LY) : 3857.7
Stellar Radius(Rsun) : 1.1 (Rsun Measured)
Stellar Mass(Msun) : 1.2 (Msun Measured) 1.2 (Msun Estimated)
Star Age : 3.0 (GY)
Temperature : 6342 (K)
Spectral type : G0
UV portion[%]: 0.3
Visible portion[%]: 1.5
IR portion[%]: 98.2
Metalicity : 0.1
Absolute Magnitude: 3.4
Apparent Magnitude: 13.7
Right Ascension(RA) 296.4032
Declination (DEC) 51.2713
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 719 LIKELY FALSE POSITIVES
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Kepler-873&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-873%20b/
Kepler-873 b
Kepler-873 b

  • Kepler-873 b is an exoplanet orbiting the star Kepler-873, located about 3857.7 light-years (1182.8 pc) away from Solar System. Its discovery was publicly announced on 2016.
  • The host star Kepler-873 has apparent magnitude of 13.7, with absolute magnitude of 3.4.
  • It is 1.2 times more massive and 1.1 times bigger compared with our Sun. The surface temperature is 6342 with its spectral types of G0
  • In this planetary system, the extrasolar planet Kepler-873 b orbits around the star Kepler-873 every 20.6 days with its orbital distance of 0.16 AU ( 23213902.8 km)
  • (Projected orbit of Kepler-873 b around its host star Kepler-873)


  • The Star Kepler-873 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.919 AU ( 137519108.2 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.271 AU ( 190087345.6 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.936 AU ( 289651048.5 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.849 AU ( 426234206.7 km)
  • Radiation at Planetary Boundary of Kepler-873 b : 91699.97 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-873)



  • Kopparapu Recent Venus for Star Kepler-873 distance : 0.921 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-873 distance : 1.166 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-873 distance : 1.126 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-873 distance : 1.234 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-873 distance : 2.034 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-873 distance : 2.145 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-873)



  • Original Kopparapu Recent Venus for Star Kepler-873 distance : 0.933 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-873 distance : 1.196 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-873 distance : 1.235 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-873 distance : 2.070 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-873 distance : 2.153 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-873)



    (Position in Stellar Map of star Kepler-873 and its Exoplanet Kepler-873 b)



    (Zoomed position in Stellar Map of star Kepler-873 and its Exoplanet Kepler-873 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-873*)
    *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