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When using a brass astrolabe across different dates, which error increases if the instrument's alidade is slightly warped?

A)Parallax error in celestial altitudes
B)Reduced optical resolution of shadow
C)Systematic time drift on star transits
D)Deformations based on ambient temperature

💡 Explanation

A warped alidade introduces angular misalignment; thus parallax error emerges because altitude readings become inconsistent varying with celestial object position. Therefore, altitude measurements become inherently inaccurate rather than affecting resolution or temperature sensitivity.

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