from portugal.....red cigar upon douro river

from portugal, when i was 20...
it was a clean night  i was with my cousin on a bridge over douro river- north portugal - and i noticed him that the lights of a church were off. moments after this,i was looking to the river when he cried out and said ~to me to look at for sum to north. we both saw a big cigar, red with an orange aura, strong light, running from  right to left in a right line . velocity about 30 km.h. the distance was about 600 meters. it desapear at our left side  behind a litle mountain. we run but was impossible to catch the object. some years, someone i met, told me that someone at the other side of the river could see the object but in another perspective and i enderstood that it was not so cigar but a plate. a red one. i never talked to that person and i dont know who he(or she) is. but i remember the moment very clearlyand with a sensation of pleasure!
Date is approximate.  PD