Location: Steward Observatory's Kitt Peak Station
Elevation: 2071 m (6795 ft)
Latitude: +31° 57' 46.5"
Longitude: 111° 36' 01.6"W
Time Zone: +7 hours

Diameter: 90.00" ± 0.0625" (2286 mm)
Central Obscuration Diameter: 33.5" ± 0.1" (851 mm)
Conic Constant: -1.0646 ± 0.001
Radius of Curvature: 12281 mm ± 4 mm
Uncorrected Focal Length: 6140.5 mm
Uncorrected Focal Ratio: f/2.69
(See below for corrected values)
Surface Map
Optical Parameters (some f/9)

Corrected Focal Length: 6829.2 mm
Corrected Focal Ratio: f/2.98

CCDs: Four Lockheed Martin CCD4185 (unpackaged = CCD485 packaged)
Single CCD Format: 4096 x 4097 pixels
Single CCD Active Area: 61.20 mm x 61.21 mm
Inter-CCD Gap: 15.76 mm (~1050 pixels)
Total Focal Plan Array Area: 138.16 mm x 138.18 mm
Total Active Area: 122.40 mm x 122.42 mm
Total Pixel Count: 4 x 4096 x 4097 = 67125248
Pixel Size: 15 µm
Plate Scale: 30.20"/mm
Pixel Scale: 0.453"/pixel
Edge-to-Edge Field-of-View: 1.159° x 1.159°
Active Field-of-View: 1.027° x 1.027°

Controller: Leach Controller

Available Filters: UBVRI Cousins/Bessel
Physical Size: 152.4 mm (6.0") square
Physical Size Tolerances: +0.0 mm -1.27 mm (+0.00" -0.05")
Filter Clear Aperture: 146 mm (5.75") square
Filter Width: 8.0 mm
Filter Width Tolerances: +/-4.0 mm (no larger than 13.5 mm)
U: UG1(1mm) BG40(3mm) Peak-360nm FWHM-70nm
B: GG385(2mm) BG12(1mm) BG39(1mm) Peak-440nm FWHM-100nm
V: GG495(2mm) BG39(2mm) Peak-550nm FWHM-90nm
R: OG570(2mm) KG3(2mm) Peak-700nm FWHM-220nm
I: RG9(4mm) Peak-880nm FWHM-240nm
Filter Transmission Curves (not yet available).

University of Bonn 200mm x200mm