 The orbit of Tiangong-1 was decaying gradually, and the space laboratory was predicted to be destroyed upon re-entry into Earth's atmosphere.At the request of China and the United Nations Office for Outer Space Affairs, the Inter-Agency Space Debris Coordination Committee (IADC), led by the European Space Agency (ESA), conducted an international campaign to monitor the re-entry of Tiangong-1.ESA's Space Debris Office in Darmstadt, Germany hosted and administered the campaign, with participation from other space agencies and organizations including the China National Space Administration, the Indian Space Research Organisation, the Japan Aerospace Exploration Agency, the Korea Aerospace Research Institute, and Roscosmos.