Cigar UFO sighting Dominican Republic 1978

Four family members including myself where in my uncle's vacation home in the hills of Jarabacoa in the Dominican Republic this is located in the center part of the island. My mother must have been around 43 years old, my older sister 14, I was 11 years old and my younger brother was 6 year old. 
We were sitting on the roof of the first floor facing the hill gazing the stars. It was a clear summer night with very few clouds and it was full moon. We could see the houses on the hills across our house and the clear moonlit sky. 
Looking at the horizon we noticed an aircraft aproachig. I was excited as I always been fascinated by airplanes and I though it was going to be a nice fly by. As it got near we noticed it was flying very low for an airplane so we thought it could be a helicopter. It was flying between the hills and as it flew it lit up the sides of the hills with a white light to the point you could clearly see the foliage beneath it. 
As it got closer we saw it was not helicopter. It was a long cigar shape craft around 40 feet long and also by the way and speed if was flying. As the object was cruising in between the hills it passed right in front our house about 500 feet away. We could clearly see a white glow or aura around it, and a thin lime or ligth green colored light coming from the back of it like some kind of exhaust or propulsion. It was amazing. 
We all looked at each other in disbelief as this thing flew by right in front of us making absolutely not sound, no noice, whistle or wind noise. It was as if it was floating not flying. It kept on cruising in between the hills lighting everything in its path until it went out sight in the horizon. My brothers and mother still talk about this to this date.
 I have decised to report this now after 30 years because I think it is very important people know we are not alone and I believe very much goverments of the world a very aware of UFO's and do not come forward to avoid world wide system disruptions and cultural upheavals.
Date may be approximate, although the witness does not indicate that fact.  PD