Golovnia V.V.
List of Three-Camera Astrograph plate archives obtained at the
Main Astronomical Observatory of the National Academy of Science
This file contains the information about the nearly 840 glass plates and
films, obtained between 1955 and 1961 using the Three-Ccamera Astrograph.
Astrograph longitude = +30 deg 30arcmin, latitude = +50 deg 22arcmin.
Features of Three-Camera Astrograph for cameras I, II, III, IV and V:
- Focal lenght (m) - 1,2(I,II): 1,7(III); 0,5(IV,V).
- Clear aperture (cm) - 11(I,II): 15(III); 10(IV,V).
- Plate scale (arcsec/mm)-171,9(I,II); 121,3(III); 412,5(IV,V).
- Field angular dimensoin for 13*18 cm
- plates (square degrees) - 6*8(I,II); 4*6(III) 14*20(IV,V).
Limiting stellar magnitude:
- Exposure time - 60 min, emulsion Agfa Spectral without filter - 12,0-12,8;
- Exposure time - 30 min, emulsion Agfa Spectral without filter 11,4-12,5;
- Exposure time - 30 min, emulsion Agfa Astro Panhrom without filter - 10,2 - with yellow filter - 10,5;
- Exposure time - 60 min, Film Panhrom , with orange filter - 9.8 -10,2.