The European Space Agency is planning the NEOMIR mission for launch in the early 2030s to detect hazardous asteroids hiding within the solar glare. Positioned at the Earth-Sun Lagrange Point 1, the infrared space telescope aims to provide critical early warnings for undetected space rocks heading toward Earth.
Asteroids have a habit of sneaking up on Earth from the direction of the Sun, completely hidden by blinding solar light that renders ground-based telescopes blind. To counter this blind spot, the European Space Agency has proposed a new mission named the Near-Earth Object Mission in the Infra-Red, or NEOMIR, designed to act as an orbital early warning sentinel.
Strategic Placement at Lagrange Point 1
The spacecraft will be installed approximately a million miles away from our planet at the first Lagrange point between the Sun and Earth. At this strategic location, the gravitational pull from both bodies balances out, allowing satellites to maintain their position with minimal orbital maintenance.
Operating outside Earth’s distorting atmosphere, the telescope will use infrared capabilities to detect heat emitted by asteroids that would otherwise be drowned out by sunlight. While situated at L1, NEOMIR will continuously monitor a close ring around the Sun, ensuring that any incoming hazardous space rock passes through its field of view.
Filling the Gap Left by Ground Telescopes
Astronomers have successfully tracked almost all asteroids larger than one kilometre in our solar system, but smaller rocks continue to pose severe risks. The danger was underscored on 15 February 2013, when a twenty-metre asteroid struck the atmosphere over the Ural Mountains in Russia, creating a powerful shockwave that damaged thousands of buildings and injured roughly 1,500 people from flying glass.
That impactor approached from the direction of the Sun and went completely unseen before entry. ESA’s planned NEOMIR mission will fill a gap in current asteroid detection capabilities by focusing on imminent impactors of any size, specifically targeting objects twenty metres and larger.
Complementing NASA’s NEO Surveyor
The European mission is designed to work in tandem with international planetary defence efforts, complementing NASA’s NEO Surveyor mission that is targeted for launch in 2027.
This cooperative framework ensures that large, distant objects are catalogued over years, while NEOMIR watches for immediate, harder-to-spot threats.
Timeline and Technical Challenges Ahead
The mission is currently in its early study phase following an initial feasibility assessment conducted in 2021 by the agency’s Concurrent Design Facility in the Netherlands. Engineers are actively developing the required detector technologies, associated electronics, and a half-metre telescope featuring a large, corrected focal plane alongside two infrared channels covering light in the 5-10 micrometre waveband.
Details are actively being fleshed out, with the mission planned for launch in the early 2030s aboard an Ariane 6-2 rocket. Industrial research and development projects are scheduled as supporting activities in parallel as the project moves toward hardware development.
When operational, NEOMIR is expected to detect asteroids heading toward Earth at least three weeks in advance. In a worst-case scenario where an asteroid passes near the spacecraft itself, scientists would still receive a minimum of three days’ warning—providing a critical window for local authorities to notify the public and manage potential evacuations.