Black well-defined circular object moves much faster than jet to the west of Fort Collins on a bright morning.I saw a small, black, well-defined, circular object move extremely fast in front of a white cloud to the west of Fort Collins, observed facing north from Harmony library. About 10 seconds later, a jet appeared going into the same direction as the black object. In comparison, the black object may have been around half the size of the jet. The speed of the black object was about 4 times faster than jets in the sky that day. I have never seen an object move so fast. I observed the sky off and on for about two hours and did not see a similar sized object moving at that speed although I saw several insects, birds, and planes fly that morning.This morning there had been many jets/airplanes flying with vapor trails that appeared to be intersecting at 90 degrees. I took images of the vapor trails earlier that morning.((NUFORC Note: Witness indicates that the date of the event is approximate. PD))