Imaginary Picture of Kepler-51 b

Display orbital revolution of Kepler-51 b around the hoststar Kepler-51
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Exoplanet Name : Kepler-51 b
Alternate Name : "2MASS J19455514+4956156 b, K00620.01, KIC 11773022 b, KOI-620 b, KOI-620.01, WISE J194555.14+495615.6 b"
Radius (Rjup / Re): 0.6330 (Rjup) 7.0953 (Rearth)
Mass (Mjup / Me): 0.0070 (Mjup) 2.2256 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.2514 (AU) 0.2514 (AU Est.)
Eccentricity : 0.0400
Orbital Period(Yrs) 0.1236
Orbital Period(Observed/Estimated) 45.15 (Days Obs.) 45.15 (Days Est.)
Surface Gravity (G Earth) 0.0442
Star Radiation at Atmospheric Boundary: 13988.3 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 485.4 (K)
Blackbody T 0.3(K) 455.8 (K)
Blackbody T 0.7(K) 368.8 (K)
Tidally Locked Blackbody T 0.1(K) 577.2 (K)
Tidally Locked Blackbody T 0.3(K) 542.1 (K)
Size Class: sub-Jupiter-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-51
Alternate Name : "2MASS J19455514+4956156, KIC 11773022, KOI-620, WISE J194555.14+495615.6"
Star Distance(LY) : 2555.8
Stellar Radius(Rsun) : 0.8 (Rsun Measured)
Stellar Mass(Msun) : 1.0 (Msun Measured) 1.0 (Msun Estimated)
Star Age : 0.3 (GY)
Temperature : 5674 (K)
Spectral type : G0
UV portion[%]: 7.8
Visible portion[%]: 44.8
IR portion[%]: 47.4
Metalicity : 0.0
Absolute Magnitude: 5.5
Apparent Magnitude: 15.0
Right Ascension(RA) 296.4798
Declination (DEC) 49.9377
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors "Jason H. Ste_en, Daniel C. Fabrycky, Eric Agol, Eric B. Ford, Robert C. Morehead, William D. Cochran, Jack J. Lissauer, Elisabeth R. Adams, William J. Borucki, Steve Bryson, Douglas A. Caldwell, Andrea Dupree, Jon M. Jenkins, Paul Robertson, Jason F. Rowe, Shawn Seader, Susan Thompson, and Joseph D. Twicken"
Discovery Paper - Title Transit Timing Observations from Kepler: VII. Con_rmation of 27 planets in 13 multiplanet systems via Transit Timing Variations and orbital stability
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Kepler-51+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-51%20c/
Kepler-51 b
Kepler-51 b

  • Kepler-51 b is an exoplanet orbiting the star Kepler-51, located about 2555.8 light-years (783.6 pc) away from Solar System. Its discovery was publicly announced on 2012.
  • The host star Kepler-51 has apparent magnitude of 15.0, with absolute magnitude of 5.5.
  • It is 1.0 times more massive and 0.8 times bigger compared with our Sun. The surface temperature is 5674 with its spectral types of G0
  • In this planetary system, the extrasolar planet Kepler-51 b orbits around the star Kepler-51 every 45.2 days with its orbital distance of 0.25 AU ( 37608904.7 km)
  • (Projected orbit of Kepler-51 b around its host star Kepler-51)


  • The Star Kepler-51 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.582 AU ( 87016743.4 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.804 AU ( 120279879.6 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.225 AU ( 183279918.7 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.803 AU ( 269704429.3 km)
  • Radiation at Planetary Boundary of Kepler-51 b : 13988.26 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-51)



  • Kopparapu Recent Venus for Star Kepler-51 distance : 0.607 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-51 distance : 0.768 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-51 distance : 0.742 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-51 distance : 0.814 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-51 distance : 1.360 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-51 distance : 1.435 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-51)



  • Original Kopparapu Recent Venus for Star Kepler-51 distance : 0.606 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-51 distance : 0.790 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-51 distance : 0.802 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-51 distance : 1.384 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-51 distance : 1.440 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-51)



    (Position in Stellar Map of star Kepler-51 and its Exoplanet Kepler-51 b)



    (Zoomed position in Stellar Map of star Kepler-51 and its Exoplanet Kepler-51 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-51*)
    *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