I was using my telescope to look at a nebula, intell I seen a star like object that was moving at a moderate speed in a straight line and eventually dimmed out. My first thought that it was just a satellite but I could only see it through my telescope which makes me think that it was to small to be a satellite. I'm not sure.
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Satellites can and have been seen through telescopes. Possibly it is just a very small or faint satellite which requires a telescope to see and is too difficult to detect by the naked eye. The description of a "moderate speed in a straight line and eventually dimming out" sounds like every satellite. A piece of space junk is also possible. Lots of second stage boosters and other rocket parts floating around up there that are small enough that you would only notice them through a telescope
You might be able to identify it by going to the Heavens Above site and providing your location, the date & time.