A really amazing testimony and drawing of a sighting - specifically a metallic-looking disc shaped craft that moved very slowly, and even hovered before turning - from a few years ago in Canada has just now been submitted to Reddit. Check it out:
I'm not sure exactly when.... Either 2013-2014, and late in the year. Around September, I'd say. This happened in Ontario, Canada. While I can't answer the distance questions accurately or mathematically, I can tell you it was about 2-3 houses away from mine. it was very slow-moving, ~5 mph. The observation concluded? Please rephrase what you're asking, exactly. As for the metal prongs/legs, I'm not sure. The craft never landed anywhere.