Fengyun-1C Debris: Legacy of the 2007 ASAT Test
Fengyun-1C was a Chinese weather satellite, part of the Fengyun (FY) series operated by the China Meteorological Administration. Launched on 10 May 1999, it was designed to monitor weather patterns and collect atmospheric data. The satellite was part of China's effort to enhance its meteorological capabilities. However, it is more widely known today for its role in a significant anti-satellite (ASAT) test conducted by China in 2007, which resulted in the creation of a large amount of space debris.
The primary mission of Fengyun-1C was to provide meteorological data to support weather forecasting and climate research. It carried instruments to measure various atmospheric parameters, including temperature, humidity, and cloud cover. The satellite operated in a sun-synchronous orbit, allowing it to pass over the same part of the Earth at roughly the same local solar time each day, which is ideal for consistent weather observations.
Before its destruction, Fengyun-1C orbited the Earth at an altitude of approximately 865 kilometres with an inclination of 98.8 degrees. This sun-synchronous orbit enabled it to provide consistent and reliable data for weather analysis. Following the ASAT test, the debris from Fengyun-1C was scattered across a range of altitudes and inclinations, significantly increasing the risk of collision with other satellites. The NORAD ID for Fengyun-1C was 25730, and its debris continues to be tracked by space agencies worldwide.
The 2007 ASAT test involving Fengyun-1C is often cited as one of the most significant events in the history of space debris creation. The test demonstrated China's capability to destroy satellites in orbit but also highlighted the dangers of creating debris in space. The event resulted in over 3,000 pieces of trackable debris, many of which remain in orbit today, posing a threat to operational satellites and the International Space Station. The incident has spurred international discussions on space debris mitigation and the need for responsible behaviour in space.
As of 2026, the debris from Fengyun-1C continues to be a major concern for space operations. According to the latest data, thousands of fragments remain in orbit, contributing significantly to the total number of tracked debris objects. The Orbital Radar debris tracker provides up-to-date information on the location and movement of these fragments, helping satellite operators to plan manoeuvres to avoid potential collisions. The legacy of Fengyun-1C serves as a reminder of the long-term impacts of space debris on the orbital environment.
