top equipmentThe Oakley Observatory houses eight permanently mounted telescopes. Each pier has parallel, serial, and Internet connections along with electrical outlets. 

The piers are numbered for easy identification of the telescopes and control computers, and to assign student groups.

Clark Refractor


Our No. 1 telescope is the 6-inch Clark refractor. Alvan Clark (1804-87) and his two sons, Alvan Graham and George Bassett, were famous for making the best telescopes, as well as the largest telescopes of the time. Hans Eppinger of Hughes Optical Products, Inc. donated the optical tube assembly of the Clark refractor to Rose-Hulman in 1990. At the time, there was no mount for the telescope, so it was mounted on a wall in Moench Hall as a decoration. Later, the telescope was completely refurbished and placed on a Meade LX750 Mount in the old observatory dome. The Clark is now on a Paramount ME computer controlled mount manufactured by Software Bisque and is used mainly for visual observing. However, a STL-6303E CCD camera from Santa Barbara Instrument Group is available for imaging. We also have solar filter for viewing sunspots.



Takahashi Refractor

The No. 2 telescope is a 6-inch refractor made by Takahashi. This telescope is the modern equivalent of the Clark telescope. It has a much shorter focal length and wider field of view than the Clark. Like the Clark, the Takahashi is mainly used for visual observing.




Four of the remaining six telescopes are 14-inch Celestron Schmidt-Cassegrain optical systems on Paramount ME mounts. The Schmidt-Cassegrain Telescope is named for Bernhard Schmidt, a German astronomer, and Sieur Cassegrain, a French sculptor. Light enters through a corrector plate. The corrector plate is a thin, aspheric correction lens. The corrected light passes through the optical tube to a spherical primary mirror and then back up to the tube to a convex secondary mirror. The light is returned back down the scope through a hole in the primary mirror.

Telescopes No. 3 and 4 are set up with a CCD camera from Santa Barbara Instrument Group (STL-1001E). The camera has a built-in filter wheel for taking color images. These telescopes are used for imaging deep sky objects and for research.

Telescopes No. 5 and 6 are also 14-inch Celestrons on Paramount ME mounts. Unlike the previously mentioned telescopes this pair is used primarily for visual observing. We do have an SBIG STL-4020M camera available for use on either of these telescopes. Telescope No. 6 was donated by Larry Dultz of Terre Haute.

RC Telescope

Ritchey Chretien

Telescope No. 7 is a 20-inch Ritchey Chretien telescope from RC Optical. It is used primarily for deep sky imaging with an STL-1001E CCD camera. This telescope is identical to the telescope in the Oakley Southern Sky Observatory and is helpful for debugging problems with the telescope in Australia.


The Oakley Observatory also has a 10-inch Newtonian telescope on a Dobsonian mount. This portable telescope is used for visual observing. We frequently take it to elementary schools or to local parks for star parties. The telescope has a solar filter so it can also be used during the day to view sunspots.

Planewave TelescopePlanewave Telescope

The No. 8 telescope is our newest telescope. It is a 17-inch modified Dall-Kirkham reflecting telescope made by Planewave Instruments and represents the very latest is telescope design. It offers better optical performance at a lower cost than the classic Ritchey Chretien design. This telescope is normally used with an STL-1001E CCD camera for deep sky imaging.