Astronomers have been closely watching an object that travels in an orbit around our sun. Astronomers say this object, an asteroid, circles the sun in the same orbital path as the planet Jupiter, but moves in the opposite direction. They say the asteroid came from somewhere else in the universe. And now some experts believe it could be be the oldest object in our solar system. In late May, researchers reported on a close examination of the asteroid and its orbit. They said that evidence suggests the asteroid formed elsewhere and was captured by gravitational forces when our solar system was formed.