Car-Sized Asteroid to Pass Closer Than the Moon – NASA Confirms

NASA is tracking a car-sized asteroid, designated 2026 FM3, that will pass closer to Earth than the moon this Friday, March 27, 2026. While the proximity might sound alarming, the agency has confirmed that the asteroid poses no threat to our planet. This close approach is part of a series of five asteroid flybys expected over the next few days, ranging in size from automobiles to houses.

Understanding Near-Earth Objects

Asteroids like 2026 FM3 are remnants from the early formation of our solar system, rocky bodies that never coalesced into planets. They primarily reside in the asteroid belt between Mars and Jupiter, but gravitational interactions can nudge them into orbits that bring them closer to Earth. These are classified as Near-Earth Objects (NEOs), and NASA’s Center for Near Earth Object Studies (CNEOS) diligently tracks their trajectories.

The agency uses ground-based telescopes and radar observations to determine an asteroid’s orbit with increasing precision. This allows scientists to predict close approaches and assess any potential impact risk. You can find more information about upcoming close approaches on the JPL’s Asteroid Watch website.

The Specifics of 2026 FM3’s Approach

2026 FM3 is expected to pass Earth at a distance of approximately 238,000 kilometers (148,000 miles). For context, the average distance between Earth and the Moon is 384,600 kilometers (239,000 miles). This makes the asteroid’s flyby exceptionally close, though still a safe distance. The other four asteroids expected to pass Earth in the coming days will do so at significantly greater distances, ranging from one to four million kilometers.

The size of 2026 FM3 is estimated to be comparable to a car. The other asteroids vary in size, with some being roughly the size of an airplane and others approaching the dimensions of a house. It’s important to remember that size isn’t the only factor determining potential risk; velocity and composition also play crucial roles.

Why More Meteor Sightings Now?

Interestingly, NASA has noted an increase in reported meteor sightings across the United States this week. However, this isn’t necessarily cause for concern. According to NASA, the northern hemisphere is currently experiencing peak ‘fireball’ season. “From February through April, the appearance rate of these very bright meteors can increase by as much as 10% to 30%, especially around the weeks of the March equinox,” NASA explained. These fireballs are often caused by small particles of space debris burning up in Earth’s atmosphere, and are unrelated to the larger asteroid flybys.

How NASA Tracks and Assesses Asteroid Risk

NASA employs a multi-faceted approach to tracking and assessing the risk posed by NEOs. This includes:

• Discovery: Surveys like the Catalina Sky Survey and Pan-STARRS continuously scan the night sky for new asteroids.
• Orbit Determination: Once an asteroid is discovered, astronomers make repeated observations to refine its orbit.
• Impact Probability Calculation: Sophisticated computer models are used to calculate the probability of an asteroid impacting Earth.
• Planetary Defense: NASA is actively developing technologies to deflect asteroids that pose a credible threat, such as the Double Asteroid Redirection Test (DART) mission, which successfully altered the orbit of the asteroid Dimorphos in 2022. More information on the DART mission can be found on NASA’s website.

Distinguishing Between Asteroids, Meteors, and Meteorites

It’s easy to get these terms confused. Here’s a quick breakdown:

• Asteroid: A relatively large, rocky body orbiting the Sun.
• Meteoroid: A small rocky or metallic body traveling through space.
• Meteor: The streak of light seen when a meteoroid enters Earth’s atmosphere and burns up (often called a “shooting star”).
• Meteorite: A meteoroid that survives its passage through the atmosphere and lands on Earth’s surface.

The Ongoing Search and Future Planetary Defense

The ongoing monitoring of NEOs is a critical component of planetary defense. While the vast majority of asteroids pose no immediate threat, identifying and tracking potentially hazardous objects is essential for mitigating any future risk. NASA, along with international partners, continues to invest in new technologies and missions to improve our understanding of the asteroid population and enhance our ability to protect Earth from potential impacts. The Near-Earth Object Surveyor mission, for example, is planned to launch in the coming years to accelerate the discovery and characterization of NEOs. Space.com provides further details on the NEO Surveyor mission.

The close approach of 2026 FM3 serves as a reminder of the dynamic nature of our solar system and the importance of continued vigilance in monitoring the space around our planet. While this particular asteroid presents no danger, the ongoing efforts to track and understand NEOs are vital for ensuring the long-term safety of Earth.