Asteroid 2023 EY to pass closer than the Moon this week, poses no threat

a leftover fragment from the formation of the solar system
The asteroid is one of countless remnants still orbiting from the solar system's birth 4.6 billion years ago.

Uma rocha espacial descoberta há apenas três dias passará pela Terra nesta sexta-feira mais perto do que a própria Lua, cruzando o espaço a cerca de 239 mil quilômetros de distância — 62% do caminho até o satélite natural que ilumina nossas noites. O asteroide 2023 EY, comparável em tamanho ao meteoro de Chelyabinsk de 2013, não representa risco de colisão, mas convida a uma reflexão silenciosa: vivemos em uma vizinhança cósmica movimentada, e é graças à vigilância constante de sistemas como o ATLAS que podemos observar essas passagens com curiosidade em vez de temor.

  • Descoberto há apenas três dias, o asteroide 2023 EY já estará no ponto mais próximo da Terra na manhã desta sexta-feira — uma velocidade de detecção que evidencia tanto a eficiência quanto os limites do monitoramento espacial.
  • Com entre 13 e 29 metros de diâmetro, a rocha é comparável ao meteoro que explodiu sobre Chelyabinsk em 2013, liberando energia equivalente a dezenas de bombas atômicas — um paralelo que empresta peso ao que poderia parecer apenas uma curiosidade astronômica.
  • Apesar da proximidade incomum — menor do que a distância à Lua —, astrônomos confirmam com segurança que não há risco de impacto, transformando o evento de potencial ameaça em oportunidade de observação.
  • O Projeto Telescópio Virtual transmitirá ao vivo a passagem a partir desta quinta-feira à noite, abrindo a experiência a qualquer pessoa com acesso à internet e reafirmando o papel da ciência aberta na democratização do olhar para o céu.

Um asteroide detectado há apenas três dias passará pela Terra nesta sexta-feira, às 8h35 no horário de Brasília, a uma distância de aproximadamente 239 mil quilômetros — menos do que a distância média entre a Terra e a Lua, que é de cerca de 384 mil quilômetros. Apesar da proximidade, os astrônomos garantem que não há qualquer risco de colisão.

O objeto foi identificado no dia 13 de março pelo sistema ATLAS, uma rede de quatro telescópios distribuídos pelo Havaí, Chile e África do Sul, projetada para rastrear asteroides que se aproximam da Terra. Foi durante uma varredura de rotina que o 2023 EY se revelou em movimento entre as estrelas.

Com dimensões estimadas entre 13 e 29 metros, o asteroide é semelhante em tamanho ao meteoro de Chelyabinsk, que explodiu sobre a Rússia em 2013 com força devastadora. Classificado como um asteroide do tipo Apollo, o 2023 EY segue uma órbita que cruza o caminho da Terra — o que o coloca sob monitoramento contínuo da NASA, junto a todos os objetos que se aproximam a menos de 7,5 milhões de quilômetros do planeta.

Fragmento silencioso dos primórdios do sistema solar, a rocha passará sem deixar rastros visíveis a olho nu. Para quem quiser acompanhar o evento, o Projeto Telescópio Virtual transmitirá imagens ao vivo a partir desta quinta-feira à noite, pelo site e pelo YouTube — um lembrete de que, enquanto pedras antigas cruzam o espaço ao nosso redor, há olhos atentos vigiando o céu.

An asteroid discovered just three days ago will swing past Earth this week at a distance closer than the Moon, though astronomers say there is no reason for concern. On Friday morning at 8:35 a.m. Brasília time, the space rock designated 2023 EY will reach its point of closest approach, passing within approximately 239,000 kilometers of the planet. To put that in perspective, the Moon orbits at a mean distance of about 384,000 kilometers, making this passage roughly 62 percent of that familiar lunar distance.

The asteroid was spotted on March 13 by ATLAS, an early-warning detection system designed specifically to identify asteroids on a collision course with Earth or passing near it. The network consists of four telescopes spread across the globe—two stationed in Hawaii, one in Chile, and another in South Africa. Working in concert, these instruments scan the night sky multiple times each evening, watching for the telltale movement of objects hurtling through space. It was during one of these routine sweeps that 2023 EY revealed itself.

Based on initial measurements, the asteroid measures somewhere between 13 and 29 meters across, making it roughly comparable in size to the Chelyabinsk meteor that detonated over Russia in 2013. Like many near-Earth objects, 2023 EY belongs to the Apollo class of asteroids—a designation that describes its orbital characteristics. These bodies follow paths that extend farther from the Sun than Earth's own orbit, and crucially, their trajectories intersect with ours. This crossing is what puts them on NASA's monitoring list: any asteroid that will venture within 7.5 million kilometers of Earth qualifies as a near-Earth object worthy of sustained observation.

The asteroid itself is simply a remnant, a leftover fragment from the formation of the solar system some 4.6 billion years ago. Countless such rocks populate the space between planets, most of them posing no threat whatsoever. In this case, despite the proximity of the passage, astronomers have determined with confidence that no collision will occur. The close approach is notable precisely because it is rare enough to merit attention, yet safe enough to observe without alarm.

For those interested in witnessing the event, the Virtual Telescope project will provide live imagery beginning Thursday evening at 9 p.m. Brasília time—twelve hours before the asteroid's closest pass. The broadcast will stream both on the project's website and through its YouTube channel, allowing observers anywhere with an internet connection to watch as the space rock makes its silent journey across the inner solar system. It is a reminder that while Earth shares its neighborhood with countless wandering stones, our planet's watchers are paying attention.

The asteroid will pass without offering any risk to us
— ATLAS detection system findings
The Hearth Conversation Another angle on the story
Inventor

Why does an asteroid passing closer than the Moon still make the news if it poses no threat?

Model

Because proximity is relative. At 239,000 kilometers away, this rock is genuinely close in astronomical terms—close enough that we can see it, track it, and learn from it. It's a chance to watch our detection systems work.

Inventor

How confident are scientists that it won't hit us?

Model

Confident enough that they're not issuing warnings. The orbit has been calculated. The trajectory is known. This one is a safe pass.

Inventor

What's the significance of discovering it just three days before closest approach?

Model

It shows both the power and the limitation of our detection network. ATLAS found it quickly, which is good. But it also means we're still discovering objects relatively late in their approach. That's why these systems exist—to catch the ones we might otherwise miss.

Inventor

Is an asteroid this size actually dangerous if it did hit?

Model

Yes. The Chelyabinsk meteor, which was similar in size, released energy equivalent to a large nuclear explosion when it struck the atmosphere. That's why NASA tracks these objects so carefully.

Inventor

So this is routine monitoring, not a crisis?

Model

Exactly. This is the system working as designed. Discovery, tracking, confirmation of safety, public observation. It's how we keep watch over our corner of space.

Contact Us FAQ