About the Authors

David E. Trilling

david.trilling@nau.edu

Affiliations Department of Physics and Astronomy, Northern Arizona University, Flagstaff, AZ, United States of America, Lowell Observatory, Flagstaff, AZ, United States of America

Competing Interests

The author has declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: DET. Performed the experiments: DET. Analyzed the data: DET. Wrote the paper: DET.