Subject |
has reference |
has latitude |
is an instance of |
has focal ratio |
has location |
has altitude |
has mounting manufacturer |
has owner |
has mirror maker |
has temperature |
has primary mirror shape |
has mirror diameter |
has mirror type |
has aperture |
has optical design |
is a kind of |
has comment |
has creation date |
has mount |
has longitude |
has synonym |
has secondary mirror shape |
has definition |
altazimuth telescope | | in degrees, minutes, seconds (N or S) | | | | height above sea level in meters | the person, company or institution that constructed the mounting | | | ambient | | | | | | Earth based telescope | | | altazimuth | in degrees, minutes, seconds (E or W) | | | A form of mounting similar to that of a radar which allows the telescope tube to be moved horizontally (by rotation in azimuth or compass direction) and vertically (by rotation in altitude or elevation). To follow a star the telescope must be adjusted simultaneously in both axes. (also called alt-az) |
optical telescope | astroweb | | | | | | | | | | | | | | | electromagnetic telescope | | | | | | | |
Ritchey-Chrétien | | | | | | | | | the person, company or institution that created the mirror | | concave hyperboloid | equal to aperture (except for Schmidt which has aperture smaller than mirror diameter) | material and other engineering details | or primary mirror diameter | Ritchey-Chrétien | reflector | | | | | | convex hyperboloid | A system of two mirrors, aspherized to give an image at the secondary (Cassegrain) focus free from spherical aberration and coma. |
Bol'shoi Teleskop Azimutal'nyi | astroweb | 43° 39' N | altazimuth telescope | f/4, 30 | Mount Pastukhov, Russia | 2100 m | LOMO | Special Astrophysical Obs. | LOMO | ambient | concave hyperboloid | equal to aperture (except for Schmidt which has aperture smaller than mirror diameter) | Sitall glass | 6.00 m | | | Primary mirror replaced in about 1984, and a third made of Sitall glass was figured in 1992 | 1975 | altazimuth | 41° 26'E | 6 m | convex hyperboloid | |