China’s Tianwen-2 spacecraft completes a long approach to its target asteroid after a journey of about 1 billion kilometres. Reporting from multiple outlets says the mission follows a roughly 400-day chase to catch up with a small, tumbling near-Earth object located hundreds of thousands of kilometres from Earth. The China National Space Administration confirms the probe has rendezvoused with the asteroid Kamoʻoalewa, also designated 2016 HO3, closing to within roughly 20 kilometres. At that distance, Tianwen-2 moves into its scientific exploration phase, beginning detailed observations of the asteroid’s properties. Sources also note the broader scientific motivation: the object’s nature is of interest to researchers, including the question of whether Kamoʻoalewa is simply another captured asteroid or potentially material related to the Moon. The outlets agree on the mission’s key timeline—an extended pursuit, successful rendezvous at ~20 km, and the start of study—while describing the target with both its scientific and alternative naming conventions.