Asteroid 45999, also known as 1999 AP10, is a near-Earth asteroid that belongs to the Apollo group. It was discovered on January 10, 1999, and has an estimated diameter of about 1.2 kilometers. This asteroid orbits the Sun and comes close to Earth's orbit, making it an object of interest for astronomers and planetary scientists. The orbit of Asteroid 45999 takes approximately 1.5 years to complete a full revolution around the Sun. Its path brings it within 0.05 astronomical units of Earth, which is about 4.6 million miles. Monitoring such asteroids is important for understanding potential impacts and for future space exploration missions.