Yellow hollow ring in the sky.It was Christmas eve and my elder sister and I went to our roof for watching Meteor showers. As it was a a foggy night, we hardly saw several meteorites but while watching sky we saw a semi-circular ring shaped yellow colored ring in the sky. It howered above us and took a small loop then it flown to the northern direction. That ring made us perplexed because we've never seen such a flying object.