0.9 m (36") Telescope

The 0.9m telescope is no longer scheduled as a McDonald Observatory research telescope. Currently, observing time on the telescope is used for public educational programs. The programs consist of star parties for attendees of our Elder Hostel and Teacher Education Workshops. Occasionally, the telescope is used for special VIP viewing sessions. Observers who would have asked for the 0.9m telescope in the past are urged to request the 2.1m telescope or the 0.8m telescope instead, as appropriate to the nature of their programs.

See:
Observing Support: 0.9 m Telescope

Instruments

Cassegrain f/13.5 (Dall-Kirkham) focus

Optical

Primary Mirror

Diameter

91.8 cm (36.1")

Focal length

3.18 m (125")

F-ratio

3.5

Cassegrain f/13.5 (Dall-Kirkham) focus

Focal length

12.27 m (483")

F-ratio

13.42

Field angle

20 arcmin

Plate scale

16.8 arcsec/mm

Mechanical

Primary Mirror

Weight

203 kg (448 lbs)

Thickness

15.5 cm (6.1")

Telescope Tube

Diameter

1.19 m (47")

Length

3.11 m (10'2")

Dome

Diameter

6.1 m (20')

Historical

Construction

Completed

1956

Contractor

Telescope

Boller and Chivens Division, the Perkin-Elmer Co.

Dome

McDonald Staff