Bluish green object, the size of a dime held at arms length traversing approximately a 10 degree path toward the southwest horizonI witnessed a single object descend behind the distant tree-line moving from approximately 285 degrees to approximately 275 degrees before being lost behind trees. The object was the size of a dime held at arms length and was of a mottled bluish-green color. I observed the object for just a few seconds. I was moving from the northeast moving toward the southwest and was nothing like the hundreds of shooting stars and satellites I have seen over the years. The differences were primarily the size and color of the object.