关于本计算器
Moon phase for any date: illuminated disc, percent, moon age and the eight phase names from synodic math.
月相日历
任意日期的月相、照亮比与月龄。
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残月
照亮比: 24.7% · 月龄: 24.6
常见问题
How is it computed?
Days since a known new moon modulo the 29.53-day synodic cycle.
How accurate?
Within a day for visual purposes; eclipses need precise ephemeris.
What are the 8 phases?
New, waxing crescent, first quarter, waxing gibbous, full, waning gibbous, last quarter, waning crescent.