Reference Entry

reduced proper motion

Edited by Ian Ridpath

in A Dictionary of Astronomy

Third edition


Published online February 2018 | e-ISBN: 9780191851193

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Observed proper motion multiplied by a scaling factor to reduce it to a standard distance. For example, the relative distances of a sample of stars such as Cepheid variables can be derived from photometry, and their observed motions can be scaled to some adopted standard distance. This gives a scale model of linear velocities....

Reference Entry.  57 words. 

Subjects: Astronomy and Astrophysics ; Astronomical Instrumentation, Methods, and Techniques ; Galaxies

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