田园一号卫星
The precursor Xihe mission, formally called the Chinese H-alpha Solar Explorer (CHASE), launched in October 2021.
All approved and proposed Xihe missions are named after the mythological deity Xihe.
As of December 2025, the CHASE (Xihe) spacecraft has transmitted 1.2 petabits of scientific data.
Xihe-2 will operate at the L5 point for at least five years.
Xihe-2 (羲和二号) is formally named the Lagrange-V solar observatory (LAVSO).
Xihe-2 will study the generation and evolution of solar magnetic fields and their links to solar eruptions and harmful space weather.
Xihe-2 is planned to launch on a Long March 3C from the Xichang Satellite Launch Center.
The Xihe-2 mission is scheduled to begin between November 2028 and July 2029.
The Xihe-2 spacecraft has a mass of 1,700 kilograms.
A proposed Xihe-3 mission in the 2030s would operate in an inclined orbit to observe the solar poles.
Xihe-2 aims to downlink 230 gigabits of data per day.
Xihe-2 will be the first spacecraft stationed at the Sun-Earth L5 point.