My time stamp is approximate within about 10 minutes because I didn't have a clock at hand when it happened. I was outside talking with family and was the only one facing it. I first saw it through the tree and stopped talking so abruptly my husband turned to see what I was looking at. It lasted long enough for him to see the tail end of it, but my sister who turned after him did not. It appeared almost twice the diameter of mattress when it's closest.