A spacecraft developed by Tsinghua University is set to join a fleet of international missions targeting the asteroid Apophis during its historic close encounter with Earth in 2029. The announcement positions China's academic sector as an active participant in planetary defense and asteroid science.
The mission's technical details remain sparse in the initial announcement. The spacecraft, built by Tsinghua, will aim to observe Apophis—a 340-meter-wide near-Earth object that will pass within 31,000 kilometers of Earth's surface on April 13, 2029—closer than geostationary satellites. The flyby is a rare event occurring once every several thousand years.
No launch date or mission duration has been disclosed, but the 2029 flyby sets a fixed deadline. The Tsinghua team will need to complete spacecraft development, integration, and testing before a likely launch window opening several months prior to the encounter. Past delays in Chinese deep-space missions suggest schedule risk.
Apophis was initially flagged as a potential impact threat in 2004 but has since been ruled out for at least the next 100 years. The 2029 pass offers a unique scientific opportunity: radar imaging, spectral analysis, and gravity mapping could reveal its composition, internal structure, and how Earth's gravity may alter its orbit or surface. NASA's OSIRIS-APEX (formerly OSIRIS-REx) and ESA's Ramses mission are also preparing to rendezvous with Apophis.
Some planetary scientists question whether the scientific return from a dedicated Chinese mission justifies its cost, given that NASA and ESA already plan comprehensive observations. The Tsinghua team has yet to publish mission specifications or a budget estimate.