Kepler-223 Explained

Kepler-223 (KOI-730, KIC 10227020) is a G5V star with an extrasolar planetary system discovered by the Kepler mission. Studies indicate that the Kepler-223 star system consists of 4 planets orbiting the star.[1]

Planetary system

The confirmed planetary system was first detected by the Kepler mission, and contains four planets. This system was initially believed to contain two co-orbital planets orbiting the star at approximately the same orbital distance every 9.8 days, with one permanently locked 60° behind the other in one of the two Trojan Lagrangian points.[2] The two co-orbital planets were thought to be locked in mean motion resonances with the other two planets, creating an overall 6:4:4:3 resonance.[3] This would have been the first known example of co-orbital planets.

However, follow-up study of the system revealed that an alternative configuration, with the four planets having orbital periods in the ratio 8:6:4:3 is better supported by the data. This configuration does not contain co-orbital planets,[4] and has been confirmed by further observations.[5] It represents the first confirmed 4-body orbital resonance.[6]

The radii are 3.0, 3.4, 5.2, and 4.6 Earth radii, and the orbital periods are 7.3845, 9.8456, 14.7887 and 19.7257 days, respectively.

See also

External links

Notes and References

  1. 2011 . Characteristics of planetary candidates observed by Kepler, II: Analysis of the first four months of data . . 736 . 1 . 19 . 1102.0541 . 2011ApJ...736...19B . 10.1088/0004-637X/736/1/19. Borucki . William J. . Koch . David G. . Basri . Gibor . Batalha . Natalie . Brown . Timothy M. . Bryson . Stephen T. . Caldwell . Douglas . Christensen-Dalsgaard . Jørgen . Cochran . William D. . Devore . Edna . Dunham . Edward W. . Gautier . Thomas N. . Geary . John C. . Gilliland . Ronald . Gould . Alan . Howell . Steve B. . Jenkins . Jon M. . Latham . David W. . Lissauer . Jack J. . Marcy . Geoffrey W. . Rowe . Jason . Sasselov . Dimitar . Boss . Alan . Charbonneau . David . Ciardi . David . Doyle . Laurance . Dupree . Andrea K. . Ford . Eric B. . Fortney . Jonathan . Holman . Matthew J. . 15233153 . 29 .
  2. Web site: Chown. Marcus. Two planets found sharing one orbit. New Scientist. 28 February 2011.
  3. Web site: Emspak. Jesse. Kepler Finds Bizarre Systems. International Business Times. International Business Times Inc.. 2 March 2011.
  4. Web site: Kepler Finds Planets in Tight Dance. Sky and Telescope. Beatty, Kelly. 5 March 2011.
  5. Mills. S. M.. Fabrycky. D. C.. Migaszewski. C.. Ford. E. B.. Petigura. E.. Isaacson. H.. A resonant chain of four transiting, sub-Neptune planets. Nature. 2016-05-11. 10.1038/nature17445. 533. 7604. 509–512. 27225123. 1612.07376 . 2016Natur.533..509M . 205248546.
  6. Web site: Kepler-223 System: Clues to Planetary Migration . Koppes . S. . 2016-05-17 . . 2016-05-18.

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