Early nighttime sighting of huge oval object for 1 minute.

This occurred many years ago but it is very clear in my memory.  Was btweem Enumclaw and Auburn going to a movie in a NE direction.  It was dark that night with no traffic or background lights.  I saw out of the passenger side a very very large oval object covering most of the sky.  It had colors of the spectrum shimmering around its body and a row of portholes in the center.  There was a reddish fire coming from its tail.  I signalled my husband to stop the car and he also saw it.  It was moving very slowly.  Then it took off extremely fast towards the NE and disappeared over the horizon.  Afterward we discussed reporting this but decided not to since the government was denyig everything at the time.
Witness indicates that the date of the incident is approximate.  We have assigned an arbitrary date in June 1952.  PD