1986 DA is a near-Earth asteroid that was discovered on February 22, 1986. It is classified as a member of the Apollo group of asteroids, which are known for their orbits that cross Earth's path. This particular asteroid has an estimated diameter of about 1.1 kilometers. The orbit of 1986 DA is notable because it brings it close to Earth every few years. Its closest approach occurred in 2005, when it passed within 0.006 astronomical units (about 1.1 million kilometers) of our planet. Scientists monitor such asteroids to assess any potential impact risks.