Transverse velocity
The component of a object's velocity that is perpendicular to our line of sight.
The breakdown of a star's velocity v into the radial vr and transverse vT components.
Transverse Velocity
The velocity of a star perpendicular to the line of sight.
Triaxial Ellipsoid ...
Transverse Velocity - The part of the orbital speed of a body perpendicular to the Sun between the body and the Sun ...
A star's transverse velocity is easily calculated once its proper motion and its distance are known. At the distance of Barnard's Star (1.8 pc), an angle of 10.3" corresponds to a physical displacement of 0.00009 pc, or about 2.8 billion km.
For Barnard's star this works out to 90 km/s; including the radial velocity of 111 km/s (which is at right angles to the transverse velocity) gives a true motion of 142 km/s.
A star's proper motion depends on its actual transverse velocity and inversely with its distance from us.
Proper motion: Apparent angular motion of a star on the celestial sphere, usually measured in seconds of arc per year. A star's transverse velocity, i.e.
Later it dropped to second place after the discovery of Kapteyn's Star, and still later to third place after the discovery of Barnard's Star. It is considerably farther away than either of those stars, however, which means its transverse velocity is ...
high-energy nuclei of light elements or by the capture of slow neutrons, followed by beta decay. In nuclear explosions, transuranic elements may be produced by numerous successive captures of neutrons by uranium nuclei. [DC99]
Transverse ...
reflect the relativistic Doppler dilation and boost effects. If we consider the projected separation between a stationary core and a blob moving away from it at a rate c b at an angle q to our line of sight, the apparent transverse velocity will be ...
 See also: Galaxy, Apparent, Light, Velocity, Time
  
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