Aviation observation — 10 mi south of Philadelphia, Pennsylvania — 1954-09-27

On 1954-09-27, an aviation observation was reported at or near 10 mi south of Philadelphia, Pennsylvania, United States. The catalogue lists the aircraft and observers as an Eastern Airlines and Martin 404-A crews. Its time field reads 21:22 LT. A very large luminous disc displayed flashing lights. The source codes additionally mark more than one aircraft involved. Source: Dominique F. Weinstein, Unidentified Aerial Phenomena: Eighty Years of Pilot Sightings (NARCAP TR-04, February 2001), PDF page 28, table row 18.