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Which limitation constrains accurate timekeeping using astrolabes near the Earth's equator?

A)Increased atmospheric refraction errors
B)Reduced altitude change of celestial objects
C)Parallax shift from increased Earth radius
D)Declination angle approaching zenith too rapidly

💡 Explanation

Near the equator, celestial objects rise and set at steeper angles, reducing the discernible altitude change over short time intervals because angular altitude changes less. Therefore time measurements suffer reduced precision, rather than refraction changes, parallax errors, or declination changes which do not vary significantly with latitude.

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