Second extremity is connected with the ocular star micrometer. The star light reflect from diagonal pentag mirror and go to star micrometer. Another beam of light go to star micrometer from mark of longfocal autocollimator in prime vertical through the central hole of pentag. So, it is possible to determine the coordinates of celestial bodies according to position of immovable autocollimator and check the instrumental parameters. Horizontal axial tube located in shoes and coated of insulation against temperature gradients.
Tube is connected with CCD star micrometer and pentag.
Pentag is made from citall cylinder with central hole. There are two additional microscopes for automatic determination of graduation errors and checking of their stability. The tube is vacuumed for absence of the refraction anomalous on the horizontal path. CCS includes software and hardware .