jueves 26 de marzo de 2026

Asteroide 2024 YR: Lo que se sabe del cuerpo celeste descubierto desde Chile y que podría impactar la Tierra

La NASA mira con atención al asteroide 2024 YR4, descubierto en diciembre de 2024, con el telescopio ATLAS (Asteroid Terrestrial-impact Last Alert System), desde Río Hurtado, en Chile y que ya se confirmó tiene una trayectoria que podría impactar al planeta Tierra.

5 de febrero de 2025 - 00:00

La Agencia Espacial Europea (ESA) y la estadounidense NASA han movilizado sus sistemas de observación y seguimiento para el asteroide 2024 YR4, que tiene una pequeña posibilidad (1,5%) de impactar contra la Tierra el 22 de diciembre de 2032.

El asteroide, que fue descubierto en diciembre desde el telescopio ATLAS de Chile, mide entre 40 y 90 metros de diámetro (en el caso de golpear el planeta no causaría una catástrofe global), según los últimos datos publicados por la ESA, si bien se irán refinando a medida que se tengan nuevas observaciones.

El coordinador del servicio de información de la Oficina de Defensa Planetaria de la ESA, Juan Luis Cano, señala a Agencia EFE que sigue habiendo "un 98,5% de posibilidades que no impacte con la Tierra, no queremos transmitir un mensaje catastrofista a la sociedad", indica.

Se activa a red mundial de defensa

Con las notificaciones emitidas la semana pasada por dos instituciones encargadas del seguimiento de asteroides, "se está simplemente informando que, como expertos y por nuestros protocolos, tenemos que poner una atención especial a este asteroide particular", precisa Cano.

El experto hace referencia al Grupo Consultivo de Planificación de Misiones Espaciales (SMPAG), presidido por la ESA y formado por agencias espaciales, así como a la Red Internacional de Alerta de Asteroides (IAWN), presidida por la NASA en la que además de las agencias están presentes los observatorios de Objetos cercanos a la Tierra y los centros de investigación relacionados con asteroides.

Cano indica que IAWN emitió una notificación de potencial impacto de asteroide el 29 de enero, la cual debe hacer cuando el cuerpo observado es mayor de 10 metros y supera una posibilidad de impacto del 1%.

El documento indica que, en el caso de colisión, el pasillo de riesgo sería el océano Pacífico oriental, el norte de Sudamérica, el océano Atlántico África, el Mar Arábigo y el sur de Asia, donde "en el improbable caso de un impacto" se producirían daños graves por explosión.

El SMPAG activa sus avisos cuando el objeto, además de superar el 1% de posibilidad de impacto, tiene más de 50 metros de tamaño. Esta instancia se reunió el pasado viernes y emitió su aviso el domingo.

Estas son "notas de atención -reitera el experto- en las que se explica públicamente que nuestros grupos tienen que hacer un seguimiento especial".

Cano destaca que con el asteroide 2024 YR4 es la primera vez en 20 años que se encuentran "con un caso tan relevante", el anterior fue el del asteroide Apofis, descubierto en 2004, pero del que rápidamente se pudo reducir el nivel de riesgo.

 

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