Difference between revisions of "Hour Angle"
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Hour Angle
</dt>
Angular distance west of a celestial
meridian or hour
circle; the arc of the celestial equator, or the angle at the celestial
pole, between the upper branch of a celestial meridian or hour circle and the
hour circle of a celestial
body or the vernal
equinox, measured westward through 360 degrees.
</dd>
Hour angle is usually further designated as local, Greenwich, or
sidereal as the origin of measurement is the local or Greenwich celestial
meridian or the hour circle of the vernal equinox. See meridian
angle. [[/a>|/a>
]]
References
This article is based on NASA's Dictionary of Technical Terms for Aerospace Use
