Which angular relationship is corrected for when using an astrolabe to determine the time of day?

💡 Explanation

When determining time with an astrolabe, the equation of time offset is required because the sundial time (apparent solar time) differs from mean solar time due to Earth's elliptical orbit and axial tilt. Therefore the equation of time must be corrected, rather than refraction, declination or parallax which are from atmospheric effect, magnetic fields and observational perspective, respectively.

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