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- Kirkwood_gap abstract "A Kirkwood gap is a gap or dip in the distribution of main-belt asteroids by semi-major axis (or equivalently by orbital period). They correspond to the location of orbital resonances with Jupiter. For example, there are very few asteroids with semimajor axis near 2.50 AU, period 3.95 years, which would make three orbits for each orbit of Jupiter (hence, called the 3:1 orbital resonance). Other orbital resonances correspond to orbital periods whose lengths are simple fractions of Jupiter's. The weaker resonances lead only to a depletion of asteroids, while spikes in the histogram are often due to the presence of a prominent asteroid family.[citation needed]The gaps were first noticed in 1866 by Daniel Kirkwood, who also correctly explained their origin in the orbital resonances with Jupiter while a professor at Jefferson College in Canonsburg, Pennsylvania.Most of the Kirkwood gaps are depleted, unlike the mean-motion resonances (MMR) of Neptune or Jupiter's 3:2 resonance, due to the overlapping of the ν5 and ν6 secular resonances within the mean-motion resonances. The orbital elements of the asteroids vary chaotically as a result and evolve onto planet-crossing orbits within a few million years. The 2:1 MMR has a few relatively stable islands within the resonance, however. These islands are depleted due to slow diffusion onto less stable orbits. This process, which has been linked to Jupiter and Saturn being near a 5:2 resonance, may have been more rapid when Jupiter's and Saturn's orbits were closer together.More recently, a relatively small number of asteroids have been found to possess high eccentricity orbits which do lie within the Kirkwood gaps. Examples include the Alinda family and the Griqua family. These orbits slowly increase their eccentricity on a timescale of tens of millions of years, and will eventually break out of the resonance due to close encounters with a major planet.The most prominent Kirkwood gaps are located at mean orbital radii of:[citation needed] 2.06 AU (4:1 resonance) 2.5 AU (3:1 resonance), home to the Alinda family of asteroids 2.82 AU (5:2 resonance) 2.95 AU (7:3 resonance) 3.27 AU (2:1 resonance), home to the Griqua family of asteroids.Weaker and/or narrower gaps are also found at: 1.9 AU (9:2 resonance) 2.25 AU (7:2 resonance) 2.33 AU (10:3 resonance) 2.71 AU (8:3 resonance) 3.03 AU (9:4 resonance) 3.075 AU (11:5 resonance) 3.47 AU (11:6 resonance) 3.7 AU (5:3 resonance).↑ ↑ ↑".
- Kirkwood_gap thumbnail Kirkwood_Gaps.svg?width=300.
- Kirkwood_gap wikiPageExternalLink KirkwoodGaps.html.
- Kirkwood_gap wikiPageExternalLink Motion%20of%20an%20asteroid.htm.
- Kirkwood_gap wikiPageID "52839".
- Kirkwood_gap wikiPageRevisionID "591936389".
- Kirkwood_gap hasPhotoCollection Kirkwood_gap.
- Kirkwood_gap subject Category:Asteroids.
- Kirkwood_gap type Asteroid109208702.
- Kirkwood_gap type Asteroids.
- Kirkwood_gap type CelestialBody109239740.
- Kirkwood_gap type MinorPlanet109355623.
- Kirkwood_gap type NaturalObject100019128.
- Kirkwood_gap type Object100002684.
- Kirkwood_gap type PhysicalEntity100001930.
- Kirkwood_gap type Whole100003553.
- Kirkwood_gap comment "A Kirkwood gap is a gap or dip in the distribution of main-belt asteroids by semi-major axis (or equivalently by orbital period). They correspond to the location of orbital resonances with Jupiter. For example, there are very few asteroids with semimajor axis near 2.50 AU, period 3.95 years, which would make three orbits for each orbit of Jupiter (hence, called the 3:1 orbital resonance). Other orbital resonances correspond to orbital periods whose lengths are simple fractions of Jupiter's.".
- Kirkwood_gap label "Huecos de Kirkwood".
- Kirkwood_gap label "Kirkwood gap".
- Kirkwood_gap label "Kirkwoodlücke".
- Kirkwood_gap label "Kirkwoodscheiding".
- Kirkwood_gap label "Lacunas de Kirkwood".
- Kirkwood_gap label "Lacune de Kirkwood".
- Kirkwood_gap label "Lacune di Kirkwood".
- Kirkwood_gap label "Przerwy Kirkwooda".
- Kirkwood_gap label "Щели Кирквуда".
- Kirkwood_gap label "فجوة كيركوود".
- Kirkwood_gap label "カークウッドの空隙".
- Kirkwood_gap label "柯克伍德空隙".
- Kirkwood_gap sameAs Kirkwoodova_mezera.
- Kirkwood_gap sameAs Kirkwoodlücke.
- Kirkwood_gap sameAs Huecos_de_Kirkwood.
- Kirkwood_gap sameAs Kirkwooden_hutsuneak.
- Kirkwood_gap sameAs Lacune_de_Kirkwood.
- Kirkwood_gap sameAs Lacune_di_Kirkwood.
- Kirkwood_gap sameAs カークウッドの空隙.
- Kirkwood_gap sameAs 커크우드_간극.
- Kirkwood_gap sameAs Kirkwoodscheiding.
- Kirkwood_gap sameAs Przerwy_Kirkwooda.
- Kirkwood_gap sameAs Lacunas_de_Kirkwood.
- Kirkwood_gap sameAs m.0dwk8.
- Kirkwood_gap sameAs Q318541.
- Kirkwood_gap sameAs Q318541.
- Kirkwood_gap sameAs Kirkwood_gap.
- Kirkwood_gap wasDerivedFrom Kirkwood_gap?oldid=591936389.
- Kirkwood_gap depiction Kirkwood_Gaps.svg.
- Kirkwood_gap isPrimaryTopicOf Kirkwood_gap.
