star drift


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star drift

[′stär ‚drift]
(astronomy)
A description of two star groups in the Milky Way traveling through each other in opposite directions; individual stars have movements that are relative to each other. Also known as star stream.
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If the star drifts up, turn the telescope mount's azimuth knob to move the star to the right in the field.
For the eastern horizon: if the star drifts up, adjust the mount's elevation to move the star down in the field.
Rotate the eyepiece until the star drifts exactly parallel to the linear scale.
circle at the point where the star drifts across it.
If the star drifts south in the eyepiece with time, the polar axis is pointing too far east.
If the star drifts south, the polar axis points too low.
If the star drifts for whatever reason, the autoguider sends commands to the telescope's drive motors to jog the star precisely back to its original position.
If the star drifts south in the eyepiece, the polar axis is pointing too far east.
If the star drifts north, the polar axis is too far west.