At dusk, looking almost straight up, a silent, crisp, bluish white rectangle raced across the sky in about one second.

The unusual object I saw was a rectangle with the wide edge leading while travelling, as if it was a wing without a fuselage or other feature.
Color of object was bluish white, the leading edge was brighter than the trailing edge, but did not completely fade away at the trailing edge, which retained it's solidity, but just a shade darker. It seemed to be reflecting the diminishing sunlight and was not emitting its own light, similar to a jet's vapor trail color, at such time of day.
The object seemed to be large and in the higher atmosphere or low orbit, and was not disintegrating or burning up.
There were no marker lights. The object was crisp, but travelled so fast I couldn't comprehend detail very well.
There was no aura, no projecting objects or external details. No beams of light. No color changes.
It was difficult to fathom the speed, size and silence of the rectangle which travelled rapidly, in a straight line from NNW to SSE. It crossed my view in about 1 second. Similar to the speed of the large fireball I once saw.
The object did not seem to become smaller as it moved. It travelled smoothly.
As I am an hobbyist/amateur astronomer, I frequently "look up" and I was already outside, looking to see if the atmosphere was clear enough to bring out the 5" Orion Maksutov telescope and look at some star clusters. My eyes were acclimating to the dark.
I was facing south looking almost straight up.
It was just before dark, clear, and the eastern sky was navy blue, western sky was still somewhat golden from the waning sunset.
Location coordinates:
42°35'48.12"N Latitude
82°53'29.10"W Longitude
Part of my N., E., and S. view is obscured by large maple trees, but there is a more open area where I use the telescope.
I could still see the object through several holes in the overhead tree foliage as it continued, speeding down to the southern horizon. I can't see to the horizon from the back yard, I am assuming it kept on going.
I am an artist, publisher of educational materials, photographer, engineering subject matter consultant, multi-media developer and musician.
Hobbies are musical composition and performing, restoration of old sports cars or antique mechanical/electrical 'things', astronomy, off-road bicycling. Plus a few more fun things. I am over 50 years old, male. Sun sign: Aquarius, of course.
I uploaded several original artist's renderings of the object as I witnessed it, one is an animated video clip sketch.