View Full Version : Earth’s First Trojan Asteroid Discovered

2011-Jul-27, 09:50 PM
The first known “Trojan” asteroid in Earth’s orbit has been discovered. A Trojan asteroid shares an orbit with a larger planet or moon, but does not collide with it because it orbits around one of two Lagrangian point. Trojans sharing an orbit with Earth have been predicted but never found until now. Astronomers analyzing data [...]

More... (http://www.universetoday.com/87790/earths-first-trojan-asteroid-discovered/)

2011-Jul-28, 01:16 PM
It is interesting that it is orbiting the lagrange point (at 60 degrees to both earth and sun, would put it at 150 million km away), but it is now 80 million km away, and might get within 24 million km in the next 100 years.