Memo to Observers regarding Tours and Public Viewing Nights
See:
Observing Support: 2.7 m Telescope
Instruments
Cassegrain f/8.8 Ritchey-Chretien focus
- IGRINS
For trimester 25-1 IGRINS proposals require a team co-I (see - DIAFI
- George and Cynthia Mitchell Spectrograph (GCMS) / VIRUS-P
- VIRUS-W
Coudé f/32.5 focus
Robert G. Tull Coudé Spectrographs
- Cross-Dispersed Echelle Spectrograph (TS2) - Two foci available
Optical
Primary Mirror | |
Diameter | 2.72 m (107") |
Focal length | 10.68 m (35') |
F-ratio | 3.93 |
Cassegrain f/8.8 Ritchey-Chretien focus |
|
Focal length | 23.91 m (78.4') |
F-ratio | 8.8 |
Field of view | 61.5 arcmin |
Plate scale | 8.62 arcsec/mm |
Cassegrain f/17.7 focus | |
Focal length | 47.98 m (157.4') |
F-ratio | 17.65 |
Field of view | 31 arcmin |
Plate scale | 4.29 arcsec/mm |
Coudé f/32.5 focus | |
Focal length | 88.43 m (290.1') |
F-ratio | 32.54 |
Field of view | 6 arcmin |
Plate scale | 2.32 arcsec/mm |
Mechanical
Primary Mirror | |
Weight | 3540 kg (7800 lbs) |
Thickness | 31.8 cm (12.5") |
Material | fused silica |
Telescope Tube | |
Diameter | 3.66 m (12') |
Length | 9.75 m (32') |
Telescope | |
Weight | 145 t (190 tons) |
Bearings | |
Polar axis | pressurized oil and radial thrust bearings |
Dec axis | preloaded ball bearings |
Dome | |
Diameter | 23 m (76') |
Weight | 200 t (220 tons) |
Historical
Construction | |
Started | April 1966 |
Completed | October 1968 |
Contractor | |
Design | Charles Jones, Inc. |
Telescope | Westinghouse |
Dome | C.H. Lovell Construction Co. |
Optics | Davidson Optronics |