UFO Sighting in Colorado on July 18th 2015 – Bright yellow orange object, changing in brightness, south of our location, flying west, then appearing to change direction towards the south west.

We were outside at home sitting around a campfire. It was 10:30, the sky was clear, calm and quiet. I was facing south and noticed a bright orange light traveling west. I pointed it out to the rest of my family. All stood up and watched it travel across the sky apparently changing direction towards the south west until we lost it behind trees. We noticed no noise. It appeared to be flying at an altitude of roughly 500 to 1000 feet. It had no red or green marker lights or strobes standard on conventional aircraft. From our location we heard no engine or motor sound. The object was much brighter than Venus and larger as well.