CIA declassified more than 700 documents on UFO. The file is available for download. Some of the descriptions are quite clear that they do exists.
This particular one is very detail.
“An article from Moscow’s Trud newspaper dated January 30, 1985, describes how an airline crew en route from Rostov, Russia, to Tallinn, Estonia, came upon what they perceived to be a UFO about 120 kilometers from Minsk, Belarus, at about 4am. The article dramatically recounts the incident from the perspective of the crew. ‘Glancing over his portion of the sky, the copilot noticed a large star that was not flickering on his upper right. But this is no star, this yellow speck the size of a 5-kopeck coin, stretched out along the edges.”