Equation Of Time

Science / Tides and Currents / Equation Of Time: Difference between mean and apparent time. From the beginning of the year until near the middle of April, mean time is ahead of apparent time, the difference reaching a maximum of about 15 minutes near the middle of February. From the middle of April to the middle of June, mean time is behind apparent time but the difference is less than 5 minutes. From the middle of June to the first part of September, mean time is again ahead of apparent time with maximum difference less than 7 minutes. From the first of September until the later part of December, mean time is again behind apparent time, the difference reaching a maximum of nearly17 minutes in the early part of November. The equation of time for each day in the year is given in the American Ephemeris and Nautical Almanac.
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Other Words for Time

Time Noun Synonyms: period, interval, stretch, spell, patch
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