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Specifications of the 2.3m Telescope "ARISTARCHOS" |
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FEATURES OF THE TELESCOPE
(without instrumentation) |
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Height
(telescope in vertical direction) |
| 8400 mm |
Height
(telescope in horizontal direction) |
| 6000 mm |
| Weight of moving parts |
| <29000 kg |
| Total weight (with substructure) |
| <34000 kg |
| Mounting system |
| Altazimuth with 6 drives per axis |
| Encoding system |
| 2 tape encoders per axis with a resolution of 0.02 arcsec |
| Telescope balancing system |
| Automated (ATB) |
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The Optical System of the 2.3m Telescope "ARISTARCHOS" |
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| OPTICS |
| Optical System |
Ritchey - Chretien |
| Primary mirror diameter |
2280.0 mm |
| Optical aperture |
2200.0 mm |
| Final focal ratio |
f/8 |
| Field of view RC-corrected |
1.04° (diameter 321.6mm) |
| Field of view uncorrected |
10.1' (diameter 52.8mm) |
| Image scale |
1" = 85µm |
| Image quality on axis |
<0.35" (80% encircled energy, 350nm-1000nm) |
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The Acquisition & Guiding Unit of the 2.3m Telescope "ARISTARCHOS" |
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| AGU Modular Design |
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| Module 1 |
| two off-axis autoguiders |
| Module 2 |
| 4 side-ports for instruments (uncorrected field) |
| Module 3 |
main port for science instrument
(RC-corrected field) |
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| PERFORMANCE OF THE TELESCOPE |
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| Maximum rate of movement |
| 2°/sec on each axis |
| Accuracy of pointing |
| <4", up to z=70° |
| Accuracy of tracking in closed loop |
| <0.25" in 10 minutes |
| <0.50" in 1 hour |
| Operating range |
| Temp. -20° to +35° |
| Humidity up to 90% |
| Resistance against wind in operation |
| up to 15m/sec |
| Resistance against earthquakes |
| up to 2m/s² in any direction |
| Weight capacity at Cassegrain |
| up to 300 kg of instrumentation |
| CONTROL SYSTEM |
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| Manual mode |
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| Automatic mode |
| including advance activity scheduling |
| Remote control mode |
| including planetarium mode |
| Three levels of safety |
software limits,
signal limits,
hardware limits |
| EQUIPMENT |
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| High QE CCD camera (first light instrument) |
UV-coated,
cryogenic cooling,
1024x1024 frame,
24µm square pixels |
| Auxiliary |
Optics alignment tools,
lifting tackles |
| Observatory enclosure |
lightweight steelframe,
double skin insulated
and fully opened with windscreen |
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