2025年1月29日 · The asteroid, which is estimated to be about 130 to 300 feet wide, caught astronomers’ attention when it rose on the NASA automated Sentry risk list on Dec. 31, 2024. The Sentry list includes any known near-Earth asteroids that have a non-zero probability of impacting Earth in the future.

2025年1月31日 · How was this asteroid discovered? 2024 YR4 was discovered on December 27, 2024, by the NASA-funded Asteroid Terrestrial-impact Last Alert System (ATLAS) telescope in Rio Hurtado, Chile. The object had a close approach with Earth on December 25, which is why it became bright enough to be detected in the asteroid surveys.

10 小时之前 · Don’t panic, but an asteroid has a 1.9% chance of hitting Earth in 2032 More data will likely reduce the chance of an impact to zero. If not, we have options.

2025年1月22日 · Typically, asteroids — like the one depicted in this artist’s concept — originate from the main asteroid belt between the orbits of Mars and Jupiter, but a small population of near-Earth objects may also come from the Moon’s surface after being ejected into space by an impact.

1 天前 · This asteroid may hit Earth in 2032. Don't panic—scientists have a plan. Space agencies have systems in place to spot, track, and forecast the future orbits of potentially hazardous asteroids.

2025年1月22日 · The near-Earth object was likely ejected into space after an impact thousands of years ago. Now it could contribute new insights to asteroid and lunar science.

Explore the 3D world of Asteroids, Comets and NEOs. Learn about past and future missions, tracking and predicting orbits, and close approaches to Earth.

2024年10月2日 · Part of NASA’s Deep Space Network, the Goldstone Solar System Radar, near Barstow in California, will track the object during its next close pass of our planet, in January 2025, which will still be five times as far from Earth as the Moon. The asteroid will then leave the vicinity of Earth as it continues its orbit around the Sun.

2024年12月20日 · 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. But that impact assessment changed after astronomers tracked Apophis, and its orbit became better determined.

2023年9月29日 · 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.