Search results
The average near-Earth asteroid, such as 2019 VF 5, passes Earth at 18 km/s. The average short-period comet passes Earth at 30 km/s, and the average long-period comet passes Earth at 53 km/s. [10] A retrograde parabolic Oort cloud comet (e=1, i=180°) could pass Earth at 72 km/s when 1 AU from the Sun.
Tematy dnia
4 lis 2024 · Near-Earth Asteroids as of November 2024. Each month, NASA’s Planetary Defense Coordination Office releases a monthly update featuring the most recent figures on NASA’s planetary defense efforts, near-Earth object close approaches, and other timely facts about comets and asteroids that could pose an impact hazard with Earth.
4 dni temu · Learn about the dates, sizes and distances of the next five asteroids that will fly by Earth within 19.5 lunar distances. See images and details of each object on the Asteroid Watch dashboard.
Explore the 3D world of Asteroids, Comets and NEOs. Learn about past and future missions, tracking and predicting orbits, and close approaches to Earth.
Learn how NASA monitors and characterizes asteroids and comets that approach Earth, and assesses their impact risk. Find out more about the Center for Near-Earth Object Studies, the Sentry system, the Scout system, and the Planetary Defense Coordination Office.
Asteroid 99942 Apophis is a near-Earth object (NEO) estimated to be about 1,100 feet (335 meters) across. When it was discovered in 2004, Apophis was identified as one of the most hazardous asteroids that could impact Earth.
Eyes on Asteroids. See thousands of asteroids and comets in real-time, see the next five close approaches to Earth, and explore past, present and future missions to asteroids and comets.
