Hoovering disk like object by Father and Son, Brookyln, NY 1970

To whom it may concern,  My Father and I were going to my grandparent's home one afternoon. As we were heading towards the back of the home we both immediately saw a disk like object hoovering above my Grandmother's vegetable garden. It was so close that I went to pick up a rock to throw it but my Dad smacked the rock out of my hand.I was six years old at the time !  It was your classic disk shape, light grey in color, with multi-colored lights I think that were roatating in a clockwise fashion. It was hovering not more than 20 feet from us yet it did have some movement in trying to stay in place but ever so slightly. I don't recall any heat coming off the object. I did hear a buzzing sound. The dimensions weren't very large maybe big enough to fit 4 humans comfortably inside. At a certain point I recall a small panel on the inferior-anterior edge of the saucer slide open and some sort of camera like cone shaped obect come out and pointed it at us, almost like it was observing our actions.
 My Dad said to stay put and keep an eye on it while he went into the house to telephone some friends.  Ater a few seconds of finding myself alone with this floating disk I got scared and ran into the house. When we came back out the disk was gone and I was very disappointed. I don't exactly know the exact time and Month when this occured but I born in 1964 and I was six at the time so the year was 1970. I remember wearing a t-shirt so it was either late summer or maybe during a warm spell in Fall. Over the years I would every now and again mention it to my Dad if what we saw was real and he said yes it was. I'm sorry to say that my Dad died last year but I today I have found your website and this is why I am writing to you in order to remind me that it was true what we saw that afternoon. My Father was a very successful M.D. and I too am a M.D. This  experience has stayed with me forever. I did do some research maybe a couple of years after I saw it but I never found anything. I guess at the time I was too young. We never mentioned it to anyone except to family and very close friends for fear of being considered crazy. Thank you very much for the opportunity in giving my eyewittness account that was much overdue ! With regards Frank C.