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2 Satellites Will Narrowly Avoid Colliding Over Pittsburgh On Wednesday

Published by Slashdot on Wed, 29 Jan 2020


Two defunct satellites traveling at 32,800 mph will narrowly miss colliding with one another over Pittsburgh on Wednesday evening. "If the two satellites were to collide, the debris could endanger spacecraft around the planet," reports Space.com. From the report: It will be a near miss: LeoLabs, the satellite-tracking company that made the prediction, said they should pass between 50 feet and 100 feet apart (15 to 30 meters) at 6:39:35 p.m. local time. One is called the Infrared Astronomical Satellite (IRAS). Launched in 1983, it was the first infrared space telescope and operated for less than a year, according to the Jet Propulsion Laboratory. The other is called the Gravity Gradient Stabilization Experiment (GGSE-4), and was a U.S. Air Force experiment launched in 1967 to test spacecraft design principles, according to NASA. The two satellites are unlikely to actually slam into each other, said LeoLabs CEO Dan Ceperley. But predictions of the precise movements of fairly small, fast objects over vast distances is a challenge, Ceperley told Live Science. (LeoLabs' business model is selling improvements on those predictions.) If they did collide, "there would be thousands of pieces of new debris that would stay in orbit for decades. Those new clouds of debris would threaten any satellites operating near the collision altitude and any spacecraft transiting through on its way to other destinations. The new debris [would] spread out and form a debris belt around the Earth," Ceperley said.Read more of this story at Slashdot.
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