Sidereal time is NOT used（）.<br>A:as the basis for star charts<br>B:to enter a star finder<br>C:in sight reduction using Pub 249<br>D:in sight reductions of planet observations

Sidereal time is NOT used（）.
A:as the basis for star charts
B:to enter a star finder
C:in sight reduction using Pub 249
D:in sight reductions of planet observations

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