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The components for proper motion in the equatorial coordinate system (of a given epoch, often J2000.0) are given in the direction of right ascension (μ α) and of declination (μ δ). Their combined value is computed as the total proper motion (μ). [2] [3] It has dimensions of angle per time, typically arcseconds per year or milliarcseconds ...
Orbital Parameters of a Cosmic Object: . α - RA, right ascension, if the Greek letter does not appear, á letter will appear. δ - Dec, declination, if the Greek letter does not appear, ä letter will appear.
No description. Template parameters [Edit template data] Parameter Description Type Status 1 1 no description Unknown optional 2 2 no description Unknown optional 3 3 no description Unknown optional 4 4 no description Unknown optional 5 5 no description Unknown optional The above documentation is transcluded from Template:Pmcon/doc. (edit | history) Editors can experiment in this template's ...
When graphing visual binaries, the NCP is, as in the illustration, normally drawn from the center point (origin) that is the Primary downward–that is, with north at bottom–and PA is measured counterclockwise. Also, the direction of the proper motion can, for example, be given by its position angle.
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