Re: Relativity
Although 15km/sec is incredibly fast for us small Earthlings, it is only 0.005% of the speed of light, which is far below the speed where any relativistic time dilation would start to have an appreciable affect.
However, it is true that its internal clocks will have been running faster than any on Earth, but that is as a result of it being far away from a gravitational field (in our case Earth's), rather than the speed it is moving at.