large boomerang floating across sky in wash.d.c.-observed with night vision goggles

the boomerang shaped object was very large and was composed of about 17 large white lights one in the center and the others around it making a boomerang shape.  i watched it slowly going across the sky. then another object something like a helicopter came towards it and was flying under it for a distance. 
After the object had floated away, the helicopter type object went back to a stationary position in the night sky.  During this whole event there was no sound and possibly no sightings unless someone else was using night vision goggles the way i was because when i tried seeing the object with binoculars it was invisible i had to use my nvg to see it. the helicopter type object could be seen with binoculars but not the boomerang.