Metallic cylinder shape hovering at 45 degree angle outside airplane windowI was on an airplane sitting in a window seat. Unfortunately, I don’t remember the date, or where I was flying to. It was around 2002 and I lived in the Washington, D.C. area--so I was either flying to or from Washington, D.C. (Most likely to or from Kansas City) Out of my window I saw a metal looking object. It was shaped like a straightened out hot dog. (Long, straight, cylinder shaped and rounded at both ends) It was tilted at a 45 degree angle. It was very shiny, and it seemed to hover next to the plane for a long time. I could not tell if it was very close and small, or if it was far away and large. If it was close, it was not dangerously close. But it didn’t seem that we were passing it. It seemed to remain in my sight for a very long time. Maybe 15-20 minutes. I think I may have stopped looking at it at some point because I don’t remember eventually "passing" it or it disappearing. At the end of the flight I asked the pilot if he saw it, and he said no. I asked him what it could possibly be. He said sometimes they see weather balloons. I’ve done google image searches on weather balloons, and have not seen anything like what I saw.((NUFORC Note: Witness indicates that the date of the incident is approximate. PD))