2007-04-17 - Denver, CO - Circle

Daylight sighting of unknown object.

I was looking east from the playground at Westerly Creek Elementary School. Object appeared bearing about 080, proceeded to track NNE, speed indeterminate-perhaps 250 knots. Estimated distance from me between ½ and ¾ miles. It was at the altitude of bottom of low clouds. I Lost sight at bearing about 350. The bottom was silvery, it appeared to be round from the bottom, kind of a fattened disk in cross-section. Above the mid-plane, there was a dark patch. No sign of wings or empennage. No sound, although this could have been obscured by a jet departure from DIA. I believe this may be of the same type my family saw flying in close (20 feet) formation above Westerly Creek park 2 summers ago-those two had silvery bottoms and straight leading edge, forward sweeping trailing edge wings. We saw those from about 500-1000’ straight above us.