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local standard of rest
(LSR)
subjectfact 
local standard of restis a kind of rotating reference frame2001-09-27 09:32:36.0
has definition An imaginary point, located at the Sun's distance from the Galactic center, that revolves clockwise around the Galaxy on a circular orbit. Astronomers measure a star's U, V, and W velocities with respect to the local standard of rest rather than with respect to the Sun, because the Sun has a slightly noncircular orbit. The orbital velocity of the local standard of rest around the Galaxy is about 220 kilometers per second.has source: Croswell, K. 1995 The Alchemy of the Heavens, Anchor Books, 2001-09-27 09:32:36.0
has definition A frame of reference in which the mean motion of stars in the immediate neighborhood is zero. In such a reference system, the motions of stars in the solar neighborhood (a volume of space about 100 pc in diameter) average out to zero (cf. solar motion). It is a coordinate system in which the origin is a point in the galactic plane moving in a circular orbit around the galactic center, and in which the three velocity components are Π, in the direction from the galactic center to the origin; θ, in the direction of galactic rotation; and Z, perpendicular to the galactic plane.has source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Press, 2001-09-27 09:32:36.0
has rotation rate equal to one complete orbit of the Sun around the Milky Wayhas source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Press, 2001-09-27 09:32:36.0
has acronym LSRhas source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Press, 2001-09-27 09:32:36.0
frame of referencehas acceleration2001-09-27 09:32:35.0