The University of Arizona

Remote Observing with the Schulman Foundation Telescope

The Schulman Telescope


Amateur astronomers around the world can now enjoy taking full control of the Schulman Telescope. As the largest dedicated public access telescope in the world, the telescope was designed from inception to provide full remote control over the internet by amateur astrophotographers worldwide. The telescope has been provided to the Mt. Lemmon SkyCenter by the Schulman Foundation, Joseph D. Schulman, President.

Currently individuals can take direct control of the telescope operating the instrument through a web-based interface. Real-time imaging gives you feedback as to what is occurring at the observatory atop Mount Lemmon's 9,157 peak. You can see the images as they are acquired, watch the telescope and dome move, monitor the weather conditions, monitor guide stars, focus and much more. It is like being there, but sitting comfortably in your own home. Individuals can also elect to submit requests for data via scheduled (queued) observations.

We are in the process of establishing an on-line portal for purchase and scheduling of the Schulman Telescope, however, you can purchase time on the telescope or schedule queued observations now by sending an email to the Mount Lemmon SkyCenter at or by contacting us at 520-626-8122. In either case, please include the best way for us to reach you in order that we can contact you to assist in planning and successfully carrying out your observations.


Location Specifications






9157 ft.

Telescope Specifications


     0.8 m

Focal Length

5.6 m *f/7


Equatorial Fork


Schulman Telescope and Observatory


  Telescope specifications


Diameter: 0.8m

Focal Length: 5695mm (approximately f/7)

Operational Hour Angle from -5.2 to +5.2

Typical RMS guide errors 1.5 pixels (0.5 arcseconds)

Unguided exposures possible for up to 300 second exposures

All sky pointing: approximately 60” using T-point (1 arcsecond tolerance for final commanded position after plate solution and offset)

Equatorial Fork mount with no periodic error (friction drive)

Telescope slew rate: 8 degrees per second


  Observatory Specifications


Percentage of usable nights between September and June is approximately 70%

Average seeing as measured in long exposures (> 300 seconds) is approximately 1.1”

MPC observatory code G84

West longitude (h.m.s) = 7 23 09, Latitude (d.m) = 32 26.5

Altitude: 9157 ft.

Full Dome Rotation: 2 minutes

Dome shutter open/close: 5 minutes

Schulman Telescope CCD Camera and Detailed Imaging Specifications


CCD Camera: SBIG STX (KAF-16803) 4096x4096 9µ pixels

Plate Scale: 0.33”/pixel

Field of View: 22’ x 22’

Filters: 65mm square Broadband (AstroDon GenII) Red, Green, Blue also Clear (IR blocked) and 4.5nm H-alpha filters.

Faint limit of main detector for a 300 second exposure: 21st-22nd magnitude (Clear)

Chip has anti-blooming gate. Linear to 35,000 ADU

On board (dual chip SBIG design) guide chip. Filters cover guide chip.

Guide star faint limits: Clear: 13th magnitude, RGB: approximately 12th magnitude, H-alpha: 10th magnitude

60% Quantum Efficiency at 550nm

Instrument rotator (0.1 degree precision)

40-inch Electroluminescent Flat field panel

Unbinned (and uncalibrated) image size: 32Mb

CCD readout time 6 seconds (unbinned)

Autofocus time, 2 minutes

Filter select time 6 seconds

Instrument rotator full revolution 2 minutes

Sample Images of NGC1977

RGB Combined

Red Filter

Green Filter

Blue Filter


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