Bell-shaped UFO seen in Camden in 1957

Summary

A man in Camden, New Jersey, observed a bright bell-shaped object the size of an orange on August 23, 1957. The witness saw it at 45 degrees altitude before it descended and disappeared at 25 degrees northeast. The object left no trail and made no sound. Although the witness took a photo, analysts concluded the double exposure effect was caused by camera movement. Additionally, it was discovered that a weather balloon had been launched at the same time in Philadelphia, suggesting it might have been the cause of the sighting.