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orbital velocity
subjectfact 
orbital velocityhas definition Velocity required by a body to achieve a circular orbit around its primary: Vorb = (GM / r)1/2.has source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Press, 2001-09-27 09:33:27.0
is a kind of velocity2001-09-27 09:33:27.0
velocityhas base unit length per unit time2001-09-27 09:33:26.0
quantityhas unit2001-09-27 09:33:12.0
numberhas value2001-09-27 09:32:57.0