Diameter: 20in | 508mm
Focal Length: 4064
F-ratio: 8.2
Focal Length: 4064
Type: Ritchey-Chretien
Donor: Yocum Family
Manufacturer: OGS
First Light: 1999

The Yocum family timing could not of been better. In 1999, when we were getting ready to construct the Robert Glass Starport, we were looking to replace our 12.5″ Newtonian telescope that was in the dome. We looked at a bunch of telescopes, from 14″-22″. Then, we ended up finding a 20″RC, all we had to do was find a way to actually get it! We wanted to get away from the 18′ ladder we had in the dome, and get a eyepiece lower to the ground, so visitors would not have to climb up a ladder in the dark of the night. So, to make a long story short, the Yocum family made it possible for us to get a true research grade telescope. The telescope is an Optical Guidance Systems 20″ RC, f8.1, with a Paul Jones Mirror. The scope is fitted with digital setting circles, JMI drive corrector, and an AP focuser with a Feather Touch fine focus. It is fitted to a OGS German Equatorial Drive, and is in our Ash Dome. The mirror was sent back to OGS in 2011 to be recoated, and collimated. OGS did a spectacular job, as the images were good before, but outstanding when it came back! Be sure to get a glimpse through this wonderful scope. M13 during the summer is way cool…