12/6/2023 0 Comments Download one direction history![]() Others may lurk on the opposite side of the sun. ![]() Some are made of dark material that doesn’t reflect much light, making it difficult for ground-based telescopes to detect them. Some may be in orbits that don’t often bring them close to Earth. “Some asteroids are sneaky, and they have orbits that make an asteroid very hard to find,” Chodas said. That is well below NASA’s goal of identifying at least 90 percent. Models estimate that we have found just 40 percent of those that are 460 feet wide (140 meters) and larger, such as Didymos and its moonlet. Asteroids that are just a bit smaller but could still do a lot of regional damage are tougher to detect with current technology.
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