Other Companions of Earth
Earth has a second companion, asteroid 3753 Cruithne, about 5 km across, in a peculiar type of orbital resonance called an overlapping horseshoe. It is probably only a temporary liaison. Several other small objects have been found in similar orbits. Although these objects are in 1:1 orbital resonance, they are not Earth trojans because each of them does not librate around a definite Sun–Earth Lagrangian point, either L4 or L5.
Read more about this topic: Earth Trojan Asteroid
Famous quotes containing the word earth:
“If a man walk in the woods for love of them half of each day, he is in danger of being regarded as a loafer; but if he spends his whole day as a speculator, shearing off those woods and making earth bald before her time, he is esteemed an industrious and enterprising citizen. As if the town had no interest in its forests but to cut them down!”
—Henry David Thoreau (1817–1862)