Unverified50% confidenceEventExact time
2009年2月商业铱星Iridium 33与俄罗斯废弃军事卫星Kosmos 2251在西伯利亚上空约790km处以约11.7km/s相对速度相撞，产生超过2000块可追踪碎片
1
Sources
50%
Confidence
Long-term
Relevance
7/7/2026
First Seen
Sources
Space Balls Falling to Earth: How Rocket Debris Containing Toxic Hydrazine Fuel Threatens Ground Safety
hackernewshackernews7/5/2026
Related Claims
UnverifiedThe accidental collision between Iridium 33 and the defunct Russian satellite Cosmos-2251 in 2009 produced more than 2,000 trackable debris fragments in a single event.79% similarUnverifiedChina's 2007 anti-satellite weapon test destroyed the Fengyun-1C weather satellite, producing more than 3,000 trackable debris fragments in a single event, which remains the largest single source of orbital debris increase to this day.63% similarUnverifiedApproximately 27,000 debris objects larger than 10 centimeters are currently being tracked in Earth's orbit, along with hundreds of thousands of untracked fragments between 1 and 10 centimeters.59% similarUnverifiedThe U.S. Space Surveillance Network (SSN) tracks more than 27,000 pieces of space debris larger than 10 cm, and debris between 1 cm and 10 cm is estimated to exceed 500,000 pieces.53% similarUnverifiedThe number of objects in orbit tracked by the US Space Surveillance Network has exceeded 27,000.53% similar
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