Tenagra II: 0.81-m f/7 Ritchey-Chretien (32″) Telescope

0.81-m Tenagra II (32") Telescope
0.81-m Tenagra II (32″) Telescope

 0.81-m Tenagra II (32″) Telescope Specifications

This is Tenagra Observatories’ flagship telescope. It is an f/7 Ritchey-Chretien. The science camera is 2048 x 2048 x 13.5nm back illuminated E2V chip yielding ~0.98″ per pixel binned 2X2. Field of view is 16.8 X 16.8 arc minutes. Chip temperature is maintained at a constant –50° C. year round. Even more remarkable, exposures of up to 800s can be taken without need for autoguiding. A highly accurate automated refocus occurs with every telescope slew.

Paul Jones has made hundreds of Ritchey-Chretien systems and this is probably one of the last 32” systems produced. Clausing performed the coating.

Configuration: 32” Ritchey-Chretien f/6.996 Optical System
Primary Mirror: Zerodur
32” X 5” blank by Schott (ground conicoidal from 5” center to 1” edge thickness)
Center support
Secondary Mirror: AstroSitall
10.4” X 1.5”

Telescope Control System
In 2008 it was time to replace legacy hardware and software. It is now 100% ASCOM compliant (from Astrometrics, Inc.).

Housing
The telescope is in a 14.5’ Ash dome which has been modified for continuous usage: (a) control of the upper and lower shutters is via monorail contacts and (b) the dome is rotated by a large stepper motor.  Both control systems, of course, are under manual or software control.

Additional Information
Questions are welcome!  Contact Michael Schwartz at mbs@tenagraobservatories.com or 520-287-7893 (t).