300-400 foot boomerang-shaped object moving at 200 mph?, one-half mile distant at about 2,000 ft altitude. Clear skies, daytime.

This sighting occurred in June 1983 in Borger, Texas.  I had not reported this earlier because at the time it occurred I had no corroborating witnesses, no photographs, essentially nothing to substantiate the claim.  I doubted that anyone would have believed what I saw at the time.  However, this sighting stays in the back of my mind, so I am reporting it, if for no other reason, than to have closure.
The sighting occurred about 17:30 (Local Time, Central Time Zone) in June 1983.  I was in my residence and heard what I thought was a really, really, loud jet.  It was so loud that I stepped out on my front porch to see what it was.  I looked up and the object was probably one-half mile away at an altitude of probably two thousand feet.  (These are only estimations.)   It was huge.
I had a pair of 10 X 35 binoculars in the living room, so I quickly stepped back inside and grabbed the binoculars.  By that time the object was receding, so I might have been better off not using the binoculars.  I remember the object filled the binocular’s field of view, which at the time made me wonder just how big this thing actually was.
What I saw was a large black boomerang-shaped object, moving from east to west.  It was travelling at a modest speed, maybe 200 miles per hour (again, it’s hard to estimate something in the sky without reference points.)  I remember as I looked at the object, there were three specific things that struck me.  The first was the size…I can only guess that it was 300-400 feet side-to-side and maybe 75-125 feet front-to-back.  The second was the tremendous noise the object made.  It was LOUD.  And, third, the fact that the object was lopsided; that is to say it was asymmetrical.  I wondered how it stayed in the air…it didn’t look aerodynamic.
I think another reason I never reported this is the fact that it sounded like a really large jet.  Maybe it was…if so, it was like nothing I had seen before and have not seen since.  The jet sound made me think it was a conventional aircraft, but the shape and the size made me think it was something beyond classification. I did not notice any exhaust or smoke behind the craft.
Since then I have seen video of the A1 bomber and other stealth aircraft.  On one occasion I saw an A1 pass directly overhead.  Believe me, the thing I saw in 1983 makes the A1 look like a toy.
By definition, what I saw was a UFO, because it was not identified, it was flying and it was an object.  Whether it was of terrestrial origin or somewhere else, I don’t know  I wish I did.
Witness indicates that date is approximate.  PD