International Center for Astronomical, Medical and Ecological Research
 MMCS - Multi Mode Cassegrain Spectrometer
 MMCS was designed for spectral observations of faint objects at the Cassegrain focus (F/8) of the telescope ZEISS-2000. It has a modular design which allows quick transformation from its echelle to prism mode. Thus the spectrometer has wide range of resolutions from 100 to 15000 and spectral range 3700 - 8000 Å

  • collimator is a parabolic mirror with diameter of 75 mm and focal length 600 mm;
  • specially made (with central hole) echelle grating with 75 gr mm-1 and 63.° 5 blaze angle;
  • diffraction grating with 600 gr mm-1 and 8° blaze angle;
  • diffraction grating with 300 gr mm-1 and 4° blaze angle;
  • diffraction grating with 300 gr mm-1 and 6° blaze angle;
  • diffraction grating with 200 gr mm-1 and 28° blaze angle;
  • a 45° crown prism;
  • camera Schmidth-Cassegrain with F=150 mm;
  • lens camera with the F=180 mm;
  • detectors:
  • Wright Instruments CCD, 1242x1152 with 22.5 mk pixel;
    Wright Instruments CCD (back-illuminated), 1252x1152 with 22.5 mk pixel.

Observational Capabilities

Modes echelle (64°+4°) quasi echelle
classic 8°-grating classic 4°-grating
Max. Resolution 13500 3200 1200 600
Limiting Mag.,
S/N~10, Exp=1h
~12.5 ~14.5 ~15 ~16


Echelle grating

Raw echelle image R ~13000

Raw image (quasi echelle) R ~3200

Spectrum with R ~13000

Telescopes & Equipment
 2m RCC Telescope produced by Carl Zeiss Jena GmbH (Germany)
 Large Horizontal Solar Telescope  
 Zeiss-600 Telescope
 MAtrix Echelle SpecTROgraph
 Multi Mode Cassegrain
 Terskol Ultra Violet Echelle Spectrometer
Some of the observatory activities
 Spectral investigations of interstellar clouds, solar analogs, X-ray binary stars, etc.
 Orbit calculation and monitoring of geosynchronous satellites
 Simultaneous observations with the Synchronous Network of Optical Telescopes to study microvariability of stars
  Study of gas and dust in comets
 Atmospheric studies