A CASC Long March 3B rocket was set to launch the Tianwen 2 mission on Wednesday, May 28, 2025 at 5:31 PM (UTC).
Missions
Tianwen 2:
Near-Earth asteroid sample return mission. The samples are planned to be returned from asteroid 469219 Kamo'oalewa in 2027-2028, with the spacecraft set to continue afterward to the comet 331P/PANSTARRS, arriving in the mid-late 2030s.