orange sphear seen by myself and my wife over south philadelphia.After walk to corner store my wife called me on cell and asked me to come to front door . After making my way to door, she said look at the moon,(full moon at the time). Just under the moon was a bright orange ball moving slowly and changing course sharpley three times before moving out out of view. It also seemed to be dimming slowlly. It seem to disapper before flying through cloud (not through cloud). We live in a high air traffic are near airport. This was no air plane or helicopter. It was silent. Manuvering like nothing I have ever seen.