Scientists recently discovered asteroid 2024 YR4, making it one of the most closely observed space objects. Initially, NASA estimated a 3.1% chance of impact in December 2032, while the European Space Agency (ESA) calculated a 2.8% risk. Surprisingly, these figures were even higher than the early concerns surrounding asteroid Apophis in 2004.

However, NASA later revised the impact probability down to 1.5%. This shift is not unusual, as astronomers constantly update calculations with better data.

Why Does the Impact Risk Keep Changing?

An asteroid’s impact risk fluctuates as scientists gather more observations.

• At first, its exact trajectory remains uncertain.
• As they track it further, they refine its path.
• Eventually, new data either increases or decreases the impact probability.

Therefore, NASA and ESA will continue to monitor 2024 YR4. In March, the James Webb Space Telescope could provide even clearer images. As a result, future studies will determine whether the asteroid is a real threat or will safely pass by Earth.

Potential Impact Locations

According to David Rankin from the Catalina Sky Survey Project, the asteroid’s risk corridor includes several major regions:

• Bogotá, Colombia
• Abidjan, Côte d’Ivoire
• Lagos, Nigeria
• Khartoum, Sudan
• Mumbai, India
• Kolkata, India
• Dhaka, Bangladesh

Despite these locations being along the projected path, Rankin emphasizes that a direct hit remains highly unlikely. Additionally, large parts of the risk corridor are over the ocean, further reducing the chances of impacting a populated area.

Where 2024 YR4 Stands on the Torino Scale

Currently, 2024 YR4 ranks at Level 3 on the Torino Impact Hazard Scale, which measures asteroid threats.

For comparison, asteroid Apophis once reached Level 4 before scientists ruled out any danger. Richard Binzel, the creator of the Torino Scale, explained:

"For many of these objects, uncertainties in their preliminary orbits will result in calculations yielding nonzero probabilities of collision over the next century."

Moreover, he noted that impact probabilities often fluctuate before eventually dropping to zero.

Can We Prevent an Impact?

Even in the rare event that 2024 YR4 was on a collision course, scientists have potential solutions. NASA’s DART mission already demonstrated that we can alter an asteroid’s trajectory. Consequently, experts could apply similar deflection techniques if necessary.

Interestingly, Rankin also points out a 0.3% chance that the asteroid could hit the Moon instead. If that happens, it would create a dramatic impact visible from Earth.

What Happens Next?

For now, astronomers will continue tracking 2024 YR4. As new observations emerge, scientists will refine their calculations. Ultimately, if any risk remains, experts will have time to prepare defense strategies.