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6/16/2025, 9:37:24 PM
https://spacenews.com/china-lays-foundation-for-cislunar-infrastructure-with-spacecraft-in-novel-lunar-orbits/
>DRO-B and Tiandu-1 have since been sent into specific Earth-moon resonance orbits, according to official updates and amateur tracking. DRO-B is in a 3:2 resonance orbit, meaning it completes three orbits around Earth in the time it takes the moon to complete two orbits around Earth, while Tiandu-1 is in a 3:1 resonance orbit.
>The spacecraft and their orbits are being used to verify the key technologies and operations for China’s planned Queqiao constellation. The system aims to establish comprehensive communication, navigation and remote sensing to support cislunar activities, which includes establishing assets in various orbits and at Earth-moon Lagrange points. China has already utilized one of these points to facilitate lunar far side landing missions.
>DRO-B and Tiandu-1 have since been sent into specific Earth-moon resonance orbits, according to official updates and amateur tracking. DRO-B is in a 3:2 resonance orbit, meaning it completes three orbits around Earth in the time it takes the moon to complete two orbits around Earth, while Tiandu-1 is in a 3:1 resonance orbit.
>The spacecraft and their orbits are being used to verify the key technologies and operations for China’s planned Queqiao constellation. The system aims to establish comprehensive communication, navigation and remote sensing to support cislunar activities, which includes establishing assets in various orbits and at Earth-moon Lagrange points. China has already utilized one of these points to facilitate lunar far side landing missions.
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