​​NASA tracks 5 asteroids that flew past Earth in one day— One alarmingly close!​

Space is full of surprises, and sometimes, those surprises pass right by Earth. In May 2025, five asteroids are expected to zip past our planet in what NASA describes as a close-but-safe flyby event. These near-Earth objects range in size from a small bus to a large building and are being closely tracked by NASA's Asteroid Watch Dashboard. Among them, one will come even closer than the Moon, making it particularly important for scientists whose research is centered around planetary defence.

Although none of the five pose any risk of impact, their proximity and variety offer an excellent opportunity for study. Each asteroid brings unique information about the types of objects that move past our solar neighborhood.

Here are five incoming asteroids that are going to fly by the Earth

Asteroid 2025 JP passed by the Earth on 28th May, at about 3.19 million miles from Earth. Roughly 79 feet wide, about the size of a commercial airplane, this asteroid was not an immediate threat, but it’s still considered a "close approach" in astronomical terms. Objects of this size could cause significant regional damage if they ever entered Earth’s atmosphere. NASA used the radar and telescopic data to study JP’s trajectory

Asteroid 2025 KX3 is creating buzz around it for its extreme proximity, just 211,000 miles from Earth, closer than the Moon itself. It passed by the Earth on May 28. This bus-sized object, at 34 feet wide, may be small, but it is not insignificant. A similarly sized object caused the 2013 Chelyabinsk airburst in Russia. Though there was no threat this time.
But such small space rocks can have big implications if their paths shift unexpectedly.

The largest of the five, asteroid 2025 JR, measures about 250 feet across, similar in size to a large building. It passed by Earth on May 28, 2025. It was a close pass, with the asteroid reaching its closest point to Earth at 08:40 AM IST. However, it did not impact the planet, missing Earth by 4.6 million kilometers. While this distance is considered close in astronomical terms, it was not a threat to the planet. While safely distant, its massive size means that if it were ever on a collision course, the consequences could be severe.

At 91 feet wide, asteroid 2025 KW falls in the aeroplane-sized category. It was scheduled to pass by the Earth at 3.07 million miles on May 28; it’s neither the closest nor the largest, but it still holds scientific interest. NASA is using this flyby to refine KW’s orbital path and track the cataloguing of near-Earth objects.

Last in this close-approach series is asteroid 2025 KU1, flying by at about 4.6 million miles from Earth on May 28. Although it's the farthest from the Earth, its 63-foot diameter, which makes it roughly house-sized, still earns a place on NASA’s radar. While the general public may never see it, the data collected helps astronomers better map long-term NEO movement. Flybys like KU1’s are essential for refining models that predict how asteroids respond to solar radiation and gravitational forces from other celestial bodies.