position angle

British  

noun

1. the direction in which one object lies relative to another on the celestial sphere, measured in degrees from north in an easterly direction

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Example Sentences

The orbital swing is also very apparent in the change of the position angle.

From Pleasures of the telescope An Illustrated Guide for Amateur Astronomers and a Popular Description of the Chief Wonders of the Heavens for General Readers by Serviss, Garrett Putman

With similar bevel-gear and rods the tangent screw is connected to the hand-wheel, 79, by which the observer communicates the fourth or slowest motion in position angle.

From Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 2 "Hearing" to "Helmond" by Various

This ring is necessary in order to allow the rods to follow the micrometer heads when the position angle is changed.

From Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 2 "Hearing" to "Helmond" by Various

In the interval between 1718 and 1759, Bradley detected a change of 30� in the position angle of the two stars forming Castor, and was very nearly discovering their physical connection.

From The Astronomy of Milton's 'Paradise Lost' by Orchard, Thomas Nathaniel

The magnitudes are both fourth, and the distance less than a quarter of a second; position angle changing.

From Pleasures of the telescope An Illustrated Guide for Amateur Astronomers and a Popular Description of the Chief Wonders of the Heavens for General Readers by Serviss, Garrett Putman