I was standing on my back patio which faces south. About 9:30PM or so I was observing the now clear sky after a day of snow.Daily I watch as a habit, the evening sky, watching for meteors. So, I was scanning and stopped as I thought I might have seen the start of one. But, It appeared just of to the west of the most southwestern star of Orion(about a pencil width at arms length off that star dew west). I was amazed for a moment then thought oh probably just straight in at me as I had seen a bright orange one do one night, but, this one seemed to be perfectly clearly visible and not fuzzy edged as one may expect a trail to be. Then as quickly as it appeared it disappeared without any residue or trace material visible. There was no sound, It appeared to be at an altitude of at least 10 thousand ft' but if it was small may be 6 or 7 thou. The apparent craft was round and resembled the city dot on a map in size to my eye or 3/16 inch - I'm an old machinist. IT was gray to silver with a darker gray dot in the middle. From an old machine heads point of view it was PERFECTLY symmetrical. Could have been a Big meteor. I thought it worth reporting. I believe in the past on at least two occasions I have seen very odd flights and unexplainable moves then as quick as come go. Thanks for your concern as I do not believe in Aliens persay. I believe man has risen a number of times technologicly and has discovered he can't get away in space it is to far. Now he is coming back wondering but how do I reassimalate. May we have mercy on him and he on US.