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physical object > artifact > device > instrument > telescope > electromagnetic telescope > Earth based telescope > equatorial telescope

equatorial telescope
subject			fact

equatorial telescope	has mounting equatorial
	has definition The classic type of telescope mount with one axis parallel to the Earth's polar axis (i.e. pointing at the celestial pole) and the other at right angles. Once the object is located, only the polar axis need be driven by a motor to counteract the Earth's rotation.
	is a kind of Earth based telescope
Earth based telescope	has mounting manufacturer the person, company or institution that constructed the mounting
	has longitude in degrees, minutes, seconds (E or W)
	has latitude in degrees, minutes, seconds (N or S)
	has altitude height above sea level in meters
	has temperature ambient
telescope	has wavelength sensitivity
	has angular resolving power
	has effective diameter
	has aperture
	has focal ratio
	has operator
	has purpose observe celestial objects
	has location
artifact	has creator
	has creation date
	has owner
physical object	has angular momentum
	has mass
	has velocity
	has momentum
	has volume
	has extent
	has material

Kinds of equatorial telescope :

• Bent-yoke equatorial telescope (1 kind, 17 facts)
• Cross-axis equatorial telescope (1 kind, 18 facts)
• English equatorial telescope (4 kinds, 65 facts)
• Fork equatorial telescope (9 kinds, 149 facts)
• German equatorial telescope (11 kinds, 144 facts)
• Horseshoe equatorial telescope (8 kinds, 124 facts)
• Polar-disk equatorial telescope (1 kind, 18 facts)
• Schmidt (12 kinds, 181 facts) - Telescopic camera incorporating an internal corrective lens or plate that compensates for optical defects and chromatic faults in the main mirror. The system was invented by Bernhard Schmidt., A telescope with a spherical primary mirror and a thin refractive corrector plate with a complex, non-spherical shape. Very wide-field performance for surveys., A type of reflecting telescope (more accurately, a large camera) in which the coma produced by a spherical concave mirror is compensated for by a thin correcting lens placed at the opening of the telescope tube. The Schmidt has a usable field of 0^°.6.

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