Tadpole Orbit
Figure 1 above shows shorter orbits around the Lagrangian points L4 and L5 (e.g. the lines close to the blue triangles). These are called tadpole orbits and can be explained in a similar way, except that the asteroid's distance from the Earth does not oscillate as far as the L3 point on the other side of the Sun. As it moves closer to or farther from the Earth, the changing pull of Earth's gravitational field causes it to accelerate or decelerate, causing a change in its orbit known as libration.
An example of a body in a tadpole orbit is Polydeuces, a small moon of Saturn which librates around the trailing L5 point relative to a larger moon, Dione.
Read more about this topic: Horseshoe Orbit
Famous quotes containing the words tadpole and/or orbit:
“When you were a tadpole and I was a fish
In the Paleozoic time,
And side by side, on the ebbing tide,
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Or skittered with many a caudal flip
Through the depths of the Cambrian fen,
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—Langdon Smith (1858–1908)
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