Position Angle

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position angle [pə′zish·ən ′aŋ·gəl]

(astronomy)

The angle formed by the great circle running through two celestial objects and the hour circle running through one of the objects.

In measuring double stars, the angle formed between the great circle running through both components and the hour circle going through the primary measured from the north through the east from 0 to 360°.

(navigation)

That angle of the navigational triangle at the celestial body having the hour circle and the vertical circle at its sides. Also known as parallactic angle.

Position Angle

an angle on the celestial sphere between a direction given at some point and the hour circle through this point; it is measured counterclockwise from 0° to 360° from the northern sector of the hour circle. Position angles are used to determine the relative position of the components of binary stars and multiple systems and the directions of the proper motions of stars. They are measured with a position micrometer.

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No references found			With some rear projection LCD TV sets you''ll see a dimmer, washed-out image as your viewing position angles away. Some Rear Projection LCD TV Secrets by mahjabi kauser / Internet and Businesses Online community The deep yellow primary star occupies the south-western corner of the square formation with its slightly darker yellow companion in position angle 115[degrees]. A spyglass telescope by Streicher, Magda / Monthly Notes of the Astronomical Society of Southern Africa Currently John uses a 200mm SCT at his home observatory, measuring position angles and separations by analysing CCD images. New Double Star adviser by Moore, Stewart L. / Journal of the British Astronomical Association			Posadskie Sotni Posadskoe Stroenie pose Poseidon Poseidon Hippios Posen Posepny, Frantisek Bergrat Posessionnoe Pravo Posessionnye Krestiane Posessionnye Manufaktury Posessionnye Rabotniki Posestrimstvo Poset Poset Bay Posevnaia Posey County Poshan Poshekhone-Volodarsk Posidelki Posidonius Posillipo posistor POSIT Positano Position Position Angle position approximate position blocks position buoy position circle position control position correction position correction grid position doubtful position effect position error position finder position finding position firing position fixing position indicator position line Position Micrometer position operator position pulse position report position representation position sensor position telemetering position transducer position vector			positing positing positing positing on positing on positing on positing on position position position position position position position Position & Azimuth Determining System Position (CSS attribute) Position 28 with Threonine Position 80 Position Action Request Position Adaptivity Position Adjustable Range Reference Orientation Transponder Position Adjustable Workbench Position Analysis Questionnaire Position and Classification Information System Position and Communication Tracking Daemon Position and Intended Movements Position and Velocity Computer Position and Velocity Deep Ocean Transponder Position and Velocity Evaluation Position And Velocity Tracking Position Angle Position Announcement System Position Approximate Position Approximate Position Area for Artillery Position Area Hazard position audit Position Aware Safety Systems Position Azimuth Determining System position blocks Position Bond Position Bonds Position Budget Creation Position Budget Year Inquiry Position building position buoy Position circle Position Classification position control Position Control Number Position coordinate Position coordinate Position Coordinating Paper Position Correction position correction grid position day Position Days

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