

Comet Hartley 2, 103P/Hartley, is a small periodic comet with an orbital period of 6.46 years. Next appearance will be April 20, 2017
Looking for a past lecture?
Watch our Video Library
The Marshal Martz Memorial Astronomical Association is a volunteer-run 501(c)(3). Every visit is free — your membership and donations keep the telescopes running and the lectures coming.
Took a field trip there. The staff was amazing. Took time to explain to the kids in the way they would understand. Answered the kids questions with enthusiasm! Were very receptive to the kids needs and very patient. ~Erin B
Copyright © 2026, Martz-Kohl Observatory.