In spherical astronomy, the parallactic angle is the angle between the great circle through a celestial object and the zenith, and the hour circle of the object.[1] It is usually denoted q. In the triangle zenith—object—celestial pole, the parallactic angle will be the position angle of the zenith at the celestial object. Despite its name, this angle is unrelated with parallax. The parallactic angle is zero or 180° when the object crosses the meridian.
In spherical astronomy, the parallacticangle is the angle between the great circle through a celestial object and the zenith, and the hour circle of the...
List of telescope parts and construction List of telescope types Parallacticangle Polar mount - a similar mount used with satellite dishes Poncet Platform...
radius R: In which direction angle p relative to North should the ship steer to reach the target position? Parallacticangle Angular distance Birney, D...
existence implies that there must be one or more stimulating mechanisms. Parallacticangle Spudis, Paul D. (2004). "Moon". World Book at NASA. Archived from...
optical meter for the measuring of distance in 1771; it measured the parallacticangle from which the distance to a point could be deduced. Dutch mathematician...
..26..373R. rigge1918 Meadows, Peter; meadows. "Solar Observing: ParallacticAngle". Archived from the original on 7 February 2009. Retrieved 15 November...
locate objects on the celestial sphere via Alt-azimuth coordinates Parallacticangle Solar tracker Tripod Mahra, H. S.; Karkera, B. N. (1985). "Field rotation...
Differential Imaging (ADI), where exposures are acquired at different parallacticangle positions and the sky is left to rotate around the observed central...
instrumentation package stable in the sky coordinate system as the parallacticangle changes during observations. Science data can be acquired in two possible...
Michael; Bouchez, Antonin; Roberts, Jennifer E; Hunt, Stephanie (2010). "Parallactic Motion for Companion Discovery: An M-Dwarf Orbiting Alcor". The Astrophysical...
effect is − 668 ″ sin ( l ′ ) {\displaystyle -668''\sin(l')} . The parallactic inequality, first found by Newton, makes Brahe's Variation a little asymmetric...
generally poorly determined, but the Gaia mission is now measuring direct parallactic distances between their central stars and neighboring stars. It is also...
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