2009 satellite collisionPrecise, up-to-date information regarding current satellite positions is difficult to obtain. Sorting through the large number of potential collisions to identify those that are high risk presents a challenge.
Events where two satellites approach within several kilometers of each other occur numerous times each day. He estimated the risk of collision per conjunction as one in 50 million. This collision and numerous near-misses have renewed calls for mandatory disposal of defunct satellites (typically by deorbiting them), but no such international law as yet exists. .
space agency NASA reported that a large amount of debris was produced by the collision. Johnson, NASA s chief scientist for orbital debris, estimated that the satellite collision created approximately 1,000 pieces of debris larger than 10 centimeters (4 inches), in addition to many smaller ones.
Space Surveillance Network tracks more than 500 pieces of debris, but it will take more time to estimate the full extent of the collision debris. Several smaller collisions had occurred previously, often during rendezvous attempts or the intentional destruction of a satellite, including the DART satellite colliding with MUBLCOM, Kosmos-2251 was a 950-kilogram (2,094 lb) Strela communications satellite. The 2009 satellite collision was the first major collision between two intact artificial satellites in Earth orbit.
Currently the U.S. John Campbell of Iridium spoke at a June 2007 forum discussing these tradeoffs and the difficulty of handling all the notifications they were getting regarding close approaches, which numbered 400 per week (for approaches within 5 km) for the entire Iridium constellation.
Calculations made by CelesTrak had expected these two satellites to miss by 584 meters. Planning an avoidance maneuver with due consideration of the risk, the fuel consumption required for the maneuver, and impacts on the satellite s normal functioning can also be challenging. was launched on September 14, 1997 atop a Proton rocket. On February 13, witnesses in Kentucky began hearing sonic booms. However, in contradiction to these government agencies reports, the United States Strategic Command, which tracks satellites and orbital debris, denied that the reports of booms and flashes of light in the sky were related to the satellite collision. A bolide ( fireball ) over Texas on February 15 was mistaken for reentering debris. Nicholas L.
While the Iridium satellite was operational at the time of the collision, the Russian satellite had been out of service since at least 1995 and was no longer actively controlled. U.S. The collision occurred at 16:56 UTC on February 10, 2009, at 789 kilometres (490 mi) The collision destroyed both Iridium 33 (owned by Iridium Satellite LLC) and Kosmos 2251 (owned by the Russian Space Forces).