boomerang dimly lit point at forward edges almost transparent.

seen strange almost boomerang shape,, almost transparent sweeping thru a night sky, just after a freeking violent thunder storm just after sunset.  The object is almost half round to a boomerang shape with lights on edge dimly lit (maybe due to some cloud).  
Was stargazing then suddenly out of nowhere coming from south to north,, just passing the constellation of leo sickle head at great speed.  It's  unlikely an airplane because  every night i would see giant airplane goes aorund in circle.  But this is exceptional.  It caught my eyes unexpectedly followed it as much as I can until it disappear in the thick cloud.  It was unusual for me because its the first time i saw an object almost transparent with many dimly lit lights on its forward edges.  
Don't have an image of camera so I just want this page to be notified.