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===Other groups out to the orbit of Jupiter=== There are a number of more or less distinct asteroid groups outside the asteroid belt, distinguished either by mean distance from the Sun, or particular combinations of several orbital elements: * The [[Hungaria family|Hungaria asteroid]]s, with a mean orbital radius between 1.78 AU and 2 AU, an eccentricity less than 0.18, and inclination between 16° and 34°. Named after [[434 Hungaria]], these are just outside Mars's orbit, and are possibly attracted by the 9:2 Jupiter resonance or the 3:2 Mars resonance. * The [[Phocaea family|Phocaea asteroid]]s, with a mean orbital radius between 2.25 AU and 2.5 AU, an eccentricity greater than 0.1, and inclination between 18° and 32°. Some sources group the Phocaeas asteroids with the Hungarias, but the division between the two groups is real and caused by the 4:1 resonance with Jupiter. Named after [[25 Phocaea]]. * The [[Alinda asteroid]]s have a mean orbital radius of 2.5 AU and an eccentricity between 0.4 and 0.65 (approximately). These objects are held by the 3:1 resonance with Jupiter and a 4:1 resonance with [[Earth]]. Many Alinda asteroids have perihelia very close to Earth's orbit and can be difficult to observe for this reason. Alinda asteroids are ''not'' in stable orbits and eventually will collide either with Jupiter or terrestrial planets. Named after [[887 Alinda]]. * The [[Pallas family]] asteroids have a mean orbital radius between 2.7 and 2.8 AU and an inclination between 30° and 38°. Named after [[2 Pallas]]. * The [[Griqua group|Griqua asteroid]]s have an orbital radius between 3.1 AU and 3.27 AU and an eccentricity greater than 0.35. These asteroids are in stable 2:1 [[libration]] with Jupiter, in high-inclination orbits. There are about 5 to 10 of these known so far, with [[1362 Griqua]] and [[8373 Stephengould]] the most prominent. * The [[Cybele asteroids]] have a mean orbital radius between 3.27 AU and 3.7 AU,<ref name="Carruba-2013" /> an eccentricity less than 0.3,<ref name=tanton /> and an inclination less than 30°.<ref name="Carruba-2013" /> This group appears to cluster around the 7:4 resonance with Jupiter. Named after [[65 Cybele]].<ref name=tanton /> * [[Hilda group|Hilda asteroid]]s have a mean orbital radius between 3.7 AU and 4.2 AU, an eccentricity greater than 0.07, and an inclination less than 20°. These asteroids are in a 3:2 resonance with Jupiter. Named after [[153 Hilda]]. * The [[Thule asteroid]]s are in a 4:3 resonance with Jupiter and the group is known to consist of [[279 Thule]], {{mpl|(186024) 2001 QG|207}}, and {{mpl|(185290) 2006 UB|219}}.<ref name="Broz-2008" /> * The [[Jupiter trojan]]s have a mean orbital radius between 5.05 AU and 5.4 AU, and lie in elongated, curved regions around the two [[Lagrangian point]]s 60° ahead and behind of Jupiter. The leading point, {{L4}}, is called the [[Greek camp]] and the trailing {{L5}} point is called the [[Trojan camp]], after the two opposing camps of the legendary [[Trojan War]]; with one exception apiece, objects in each node are named for members of that side of the conflict. [[617 Patroclus]] in the Trojan camp and [[624 Hektor]] in the Greek camp are "misplaced" in the enemy camps. There is a forbidden zone between the Hildas and the Trojans (roughly 4.05 AU to 4.94 AU). Aside from [[279 Thule]] and 228 objects in mostly unstable-looking orbits, Jupiter's gravity has swept everything out of this region.
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