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How much krypton (fuel) is there for the krypton-powered ion thrusters on Starlink satellites and how long does it last?

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We don't know exactly how much krypton starlink satellites have, but some guesswork based on the orbital maneuvers performed says that they would need ~2.5 kg of fuel. See https://space.stackexchange.com/a/36471/40045 for more information.

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