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English: This histogram clearly shows the primary Kirkwood gaps in the asteroid main-belt. These gaps (labeled "3:1", "5:2", "7:3", "2:1") are caused by mean-motion resonances between an asteroid and Jupiter. For example, the 3:1 Kirkwood gap is located where the ratio of an asteroid's orbital period to that of Jupiter is 3/1 (the asteroid completes 3 orbits for every 1 orbit of Jupiter). The effect of these mean-motion resonances is a change in the asteroid's orbital elements (particularly semimajor axis) sufficient to create these gaps in semimajor axis space.
 
inner main-belt (a < 2.5 AU)
 
middle main-belt (2.5 AU < a > 2.82 AU)
 
outer main-belt (a > 2.82 AU
日期
来源 http://ssd.jpl.nasa.gov/images/ast_histo.ps
作者 based on plot by Alan Chamberlain, JPL/Caltech
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Public domain 本文件完全由NASA创作,在美国属于公有领域。根据NASA的版权方针,NASA的材料除非另有声明否则不受版权保护。(参见Template:PD-USGov/zhNASA版权方针页面JPL图片使用方针。)
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当前2023年3月6日 (一) 17:582023年3月6日 (一) 17:58版本的缩略图792 × 612(79 KB)AspereFile uploaded using svgtranslate tool (https://svgtranslate.toolforge.org/). Added translation for ko.
2016年12月13日 (二) 01:482016年12月13日 (二) 01:48版本的缩略图792 × 612(58 KB)Rfassbindcolorized MBA division (inner, middle, outer) at 2.5 and 2.82 AU
2012年5月11日 (五) 16:242012年5月11日 (五) 16:24版本的缩略图792 × 612(60 KB)AutiwaSuppression of one of the two paths (one was used for the line, and the other for the surface). Improving a bit the size of the image.
2009年8月4日 (二) 20:572009年8月4日 (二) 20:57版本的缩略图792 × 612(112 KB)QuibikFurther optimized.
2009年8月4日 (二) 19:342009年8月4日 (二) 19:34版本的缩略图792 × 612(170 KB)QuibikCombined vertical bars into single path, thus reducing file size. Made SVG-standard compliant.
2009年1月25日 (日) 01:142009年1月25日 (日) 01:14版本的缩略图792 × 612(544 KB)Jtratcliff((Information |Description=((en|1=This histogram clearly shows the primary Kirkwood gaps in the asteroid main-belt. These gaps (labeled "3:1", "5:2", "7:3", "2:1") are caused by mean-motion resonances between an asteroid and Jupiter. For example, the 3:1

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