We were in a party of 5 people stargazing at the dam in elephant butte state park. 3 of the individuals were talking, whereas 2 individuals noticed the anomaly in the sky. they moved very slowly close to side by side, and changed direction slowly moving towards white sands missle range. their visibility diminished before they reached the ridge of the mountain. we were using a stargazing application and saw no satellites that could correspond with the anomaly, nevertheless they didn't follow a path consistent with a satellite.