Hi Peter, No not light reflections, a Satellite would have to be very large indeed to make such an image in an 8" scope.
As Satellites orbits start at around 350kms and go out to 30.000 kms they would be miniscule in your scope.
As a visible observer for many years using 8" and16" scopes I have seen many birds fly in front of the moon over the years.
The shape of your object also leads me to think A bird.
Cheers
