Kepler-223
 |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | {{{constell}}} |
| Right ascension | 19h 53m 16.40s[1] |
| Declination | +47° 16′ 46.2″[1] |
| Characteristics | |
| Apparent magnitude (g) | 15.903[1] |
| Apparent magnitude (r) | 15.301[1] |
| Apparent magnitude (i) | 15.105[1] |
| Apparent magnitude (z) | 14.963[1] |
| Apparent magnitude (D51) | 15.667[1] |
| Apparent magnitude (J) | 14.095[1] |
| Apparent magnitude (H) | 13.727[1] |
| Apparent magnitude (K) | 13.632[1] |
| J−K color index | 0.463[1] |
| Details | |
| Radius | 1.095[1] R☉ |
| Surface gravity (log g) | 4.386[1] cgs |
| Temperature | 5,599[1] K |
| Metallicity | -0.211[1] |
| Other designations | |
<<2MASS J195316.40+471646.1>> | |
KOI-730 (KIC #10227020) is a star with an extrasolar planetary system discovered by the Kepler mission. Preliminary studies indicate that the KOI-730 star system consists of 4 planets orbiting the star.[2]
Star
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Unconfirmed planetary system
An as-yet unconfirmed planetary system has been detected by the Kepler mission, containing four planet candidates. 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.[3] The two co-orbital planets thought to be locked in mean motion resonances with the other two planets, creating an overall 6:4:4:3 resonance.[4] 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.[5]
References
- ^ a b c d e f g h i j k l m n o Kepler Input Catalog, "KIC10 Search". Retrieved 5 March 2011.
- ^ arXiv, "Characteristics of planetary candidates observed by Kepler, II: Analysis of the first four months of data", William J. Borucki et al.; 2 February 2011, arXiv:1102.0541; Bibcode:2011arXiv1102.0541B;
- ^ Chown, Marcus. "Two planets found sharing one orbit". New Scientist. Reed Business Information Ltd. Retrieved 28 February 2011.
- ^ Emspak, Jesse. "Kepler Finds Bizarre Systems". International Business Times. International Business Times Inc. Retrieved 2 March 2011.
- ^ Beatty, Kelly (2011). "Kepler Finds Planets in Tight Dance". Sky and Telescope. Retrieved 11 March 2011.
Further reading
- arXiv, "Architecture and Dynamics of Kepler’s Candidate Multiple Transiting Planet Systems", Jack J. Lissauer et al.; 25 February 2011, arXiv:1102.0543; Bibcode:2011arXiv1102.0543L
External links
- New Scientist, "Two planets found sharing one orbit", Marcus Chown, 18:01 24 February 2011, Issue 2801
- "Planetary System KOI-730 Exhibiting a Pair of Co-Orbital Planets" (warning: this site requires a browser with support for "WebGL")
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