Imaginary Picture of Kepler-457 b
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Exoplanet Name : Kepler-457 b
Alternate Name : "WISE J184930.60+444140.4 b, 2MASS J18493060+4441405 b, KIC
Radius (Rjup / Re): 0.2100 (Rjup) 2.3539 (Rearth)
Mass (Mjup / Me): 0.0184 (Mjup) 5.8489 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.1610 (AU) 0.1610 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0871
Orbital Period(Observed/Estimated) 31.81 (Days Obs.) 23.14 (Days Est.)
Star Radiation at Atmospheric Boundary: 131942.6 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 850.6 (K)
Blackbody T 0.3(K) 798.8 (K)
Blackbody T 0.7(K) 646.3 (K)
Tidally Locked Blackbody T 0.1(K) 1011.6 (K)
Tidally Locked Blackbody T 0.3(K) 950.0 (K)
Size Class: sub-Neptune-size
Mass Class:
Detection Type : Primary Transit
Mass Detection :
Radius Detection : Primary Transit
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : Kepler-457
Alternate Name : "KIC 8540376 , 2MASS J18493060+4441405 , WISE J184930.60+444140. )Y@NJXF@
Star Distance(LY) : 0.0
Stellar Radius(Rsun) : 1.3 (Rsun Measured)
Stellar Mass(Msun) : 1.0 (Msun Measured) 0.6 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 6474 (K)
Spectral type : F7
Metalicity : -0.2
Absolute Magnitude: 25.0
Apparent Magnitude: 13.3
Right Ascension(RA) 282.3775
Declination (DEC) 44.6946
Hubble Space Telescope Guide Star Catalog (GSC) ID 0
Discovered by
Discovery Paper - Authors "Ji Wang, Debra A. Fischer, Thomas Barclay, Alyssa Picard, Bo Ma, Brendan P. Bowler, Joseph R. Schmitt, Tabetha S. Boyajian, Kian J. Jek, Daryll LaCourse, Christoph Baranec, Reed Riddle, Nicholas M. Law, Chris Lintott, Kevin Schawinski, Dean Joseph Simister, Boscher Gregoire, Sean P. Babin, Trevor Poile, Thomas Lee Jacobs, Tony Jebson, Mark R. Omohundro, Hans Martin Schwengeler, Johann Sejpka, Ivan A.Terentev, Robert Gagliano, Jari-Pekka Paakkonen, Hans Kristian Otnes Berge, Troy Winarski, Gerald R. Green, Allan R. Schmitt, Martti H. Kristiansen, Abe Hoekstra"
Discovery Paper - Title Planet Hunters. VIII. Characterization of 41 Long-Period Exoplanet Candidates from Kepler Archival Data
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/KIC%208540376%20b/
Kepler-457 b
Kepler-457 b

  • Kepler-457 b is an exoplanet orbiting the star Kepler-457. Its discovery was publicly announced on 2015.
  • The host star Kepler-457 has apparent magnitude of 13.3, with absolute magnitude of 25.0.
  • It is 1.0 times more massive and 1.3 times bigger compared with our Sun. The surface temperature is 6474 with its spectral types of F7
  • In this planetary system, the extrasolar planet Kepler-457 b orbits around the star Kepler-457 every 31.8 days with its orbital distance of 0.16 AU ( 24085257.2 km)
  • (Projected orbit of Kepler-457 b around its host star Kepler-457)


  • The Star Kepler-457 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.144 AU ( 171148874.6 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.581 AU ( 236572471.2 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.410 AU ( 360484092.8 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 3.546 AU ( 530468134.3 km)
  • Radiation at Planetary Boundary of Kepler-457 b : 131942.57 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-457)



  • Kopparapu Recent Venus for Star Kepler-457 distance : 1.137 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-457 distance : 1.440 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-457 distance : 1.391 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-457 distance : 1.524 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-457 distance : 2.506 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-457 distance : 2.643 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-457)



  • Original Kopparapu Recent Venus for Star Kepler-457 distance : 1.156 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-457 distance : 1.476 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-457 distance : 1.529 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-457 distance : 2.551 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-457 distance : 2.653 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-457)



    (Position in Stellar Map of star Kepler-457 and its Exoplanet Kepler-457 b)



    (Zoomed position in Stellar Map of star Kepler-457 and its Exoplanet Kepler-457 b (zoom level 3))