NASA Asteroid 2026 EG1: Bus-Sized Space Rock Already Passed Earth Last Night — No Danger, Next Approaches Tracked

The most talked-about NASA asteroid of the week already made its closest approach to Earth at 11:27 PM ET Thursday, March 12 — and the planet is fine. Asteroid 2026 EG1, a bus-sized space rock discovered just four days before its flyby, zipped past Earth at 197,466 miles — closer than the moon — while traveling at 21,513 mph. No impact risk was ever predicted.

Asteroid 2026 EG1: The Full Story of Thursday Night's Flyby

The moment at the center of tracking was precise: 2026 EG1 made its closest approach to Earth at 11:27 PM ET on March 12, when it passed 197,466 miles from the southern hemisphere while traveling 21,513 miles per hour relative to Earth. The path took it beneath Antarctica — a reminder that "close" in space can still mean an ocean and a continent away from most human eyes.

Measuring around 40 feet in diameter, the space rock was being monitored by NASA's Center for Near Earth Object Studies and was hurtling through space at more than 21,500 miles per hour. It passed closer to Earth than the moon, whose average distance is about 239,000 miles.

How Was 2026 EG1 Discovered Just 4 Days Before the Flyby?

Asteroid 2026 EG1 was discovered on March 8 — less than one week before its close pass. Initial observations following discovery revealed it follows a 655-day elliptical orbit around the sun, ranging from an innermost point within Earth's orbit to well beyond the path of Mars.

The tight timeline — discovery and flyby occurring within the same week — created public unease that official reassurance alone often cannot resolve. NASA's own messaging underscores why the public hears two different ideas at once: the agency's CNEOS has predicted no major asteroid strikes capable of causing serious damage in the next 100 years, yet the same tracking system still turns up close-pass objects only days in advance.

No Risk — Here Is Why NASA Was Certain

The tracking itself is built for exactly this kind of quick turnaround. Observations soon after discovery established 2026 EG1's 655-day orbit, which carries it away from Earth again after the March 12 flyby. Its next closest planetary approach is not expected until September 13, 2186, when it will pass approximately 7.5 million miles from the surface of Mars.

NASA and its partners are tracking over 41,000 near-Earth asteroids — a figure that will likely rise significantly thanks to the Vera Rubin Observatory, which has already discovered 2,000 hitherto unknown solar system bodies with its initial dataset.

Next NASA Asteroid Approaches: What's Coming This Week

The next tracked close approach according to NASA's Jet Propulsion Laboratory Asteroid Watch dashboard is asteroid 2026 EC1 on March 15, an airplane-sized object measuring approximately 150 feet across, passing at a closest distance of 958,000 miles from Earth — well beyond the moon's orbit and presenting no risk whatsoever.

Apophis 2029: The Big One to Watch on the Calendar

Looking further ahead, Apophis is a large near-Earth asteroid approximately 370 meters in diameter — about the size of the Empire State Building. It will come close to Earth in 2029, 2036, and 2068. Initial calculations once suggested a potential collision in 2029, but subsequent observations have confirmed Apophis will not collide with Earth for at least the next 100 years.

As of March 2026, astronomers have detected 2,533 potentially hazardous asteroids, of which 155 are larger than 1 kilometer in diameter. None pose sufficient risk of impact within the next 100 years, according to NASA's CNEOS. The agency continues its planetary defense work through tracking, mock impact scenarios, and asteroid redirect missions — all designed to ensure Earth is never caught off guard by an object with real destructive potential.