Spacecraft confirmed to be approaching one of Earth's seven mysterious 'quasi-moons'

The first spacecraft to make a close approach to Earth's enigmatic quasi-moon, Kamo'oalewa, has been confirmed, and as it approached, it captured clear photos of the object in orbit.

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The mission, launched in May 2025, is now within 12.5 miles of the space rock, setting the stage for an unprecedented attempt to collect surface samples. The Chinese spacecraft Tianwen-2 spent 400 days traveling to the asteroid, covering 620 million miles to arrive at an asteroid that is only 50 - 60 feet wide. Its mission will last over a year, during which it will fly alongside the quasi-moon to study its composition and attempt to retrieve material from its surface using methods such as "anchor-and-attach" and "touch-and-go." If successful, China will join only two other nations in the elite club of asteroid samplers.

Kamo'oalewa, one of seven known quasi-moons, presents a unique challenge for the engineers behind the project, as the moon spins rapidly, completing one rotation every half hour. Its speed, along with its small size, demands extreme precision from the nearly two-ton space probe, especially if China doesn't want to disturb the rock's trajectory. According to planetary scientist Cristina Thomas, this is the smallest object ever visited by a spacecraft, and to successfully execute sample retrieval, it will take some skill.

Frequently Asked Questions

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Question #1

How will Tianwen-2 compensate for Kamo'oalewa's 30-minute spin during sample collection maneuvers?

Tianwen-2 will fly alongside Kamo'oalewa and attempt sample retrieval using methods such as "anchor-and-attach" and "touch-and-go" while matching the rock's motion. The mission will rely on extreme precision from the nearly two-ton probe to compensate for the quasi-moon's half-hour rotation during collection maneuvers.

Answered

Question #2

How long will Tianwen-2 remain within close proximity to Kamo'oalewa to conduct mapping and sampling activities?

Tianwen-2 will remain with Kamo'oalewa for over a year, flying alongside the quasi-moon to map its surface and attempt to retrieve samples.

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Tianwen-2's success could redefine how we understand these mysterious orbiters and further solidify China's growing influence in deep-space exploration. What happens next will be a test of engineering, patience, and dexterity. If successful, we may learn much more about these mysterious Earth-bound satellites.