1) A → mounting for → telescopes
that permits both → vertical and
→ horizontal → rotation.
Altazimuth, from alt(itude) + → azimuth.
altazimuth coordinate system
râžmân-e hamârâhâ-ye farâzâ-sugân
Fr.: coordonnées azimutales
The coordinate system in which the position of a body on the → celestial sphere is described with respect to an observer's → celestial horizon and → zenith. The coordinates of a point in this system are its → altitude on the → vertical circle, and its → azimuth westward (clockwise) along the celestial horizon from the observer's south. Same as → horizon coordinate system.
Fr.: instrument altazimutal
Fr.: monture altazimutale