⌛ 恒星月 ↔ 默冬章Sidereal month to Metonic cycle (19 tyr)
恒星月与默冬章互算（1 mo sid = 0.003936838184 Metonic）。本地换算，附常用相关单位。Convert sidereal month and Metonic cycle (19 tyr) (1 mo sid = 0.003936838184 Metonic). Runs locally with related units.
点击任意一行可复制该结果；小于 0.0001 或不小于 10¹⁵ 的数值用 × 10ⁿ 科学计数法显示Click any row to copy that result. Values below 0.0001 or at least 10¹⁵ are shown in × 10ⁿ notation
使用说明与常见问题How-to & FAQ
「恒星月 ↔ 默冬章」是什么？What is the Sidereal month to Metonic cycle (19 tyr) tool?
恒星月与默冬章互算（1 mo sid = 0.003936838184 Metonic）。本地换算，附常用相关单位。Convert sidereal month and Metonic cycle (19 tyr) (1 mo sid = 0.003936838184 Metonic). Runs locally with related units.
如何使用「恒星月 ↔ 默冬章」？How do I use the Sidereal month to Metonic cycle (19 tyr) tool?
在「恒星月 ↔ 默冬章」中输入数值并选择原单位，表格会同时列出换算到所有其他单位的结果，可一键复制。Enter a value in the Sidereal month to Metonic cycle (19 tyr) and choose the source unit; the table shows the value in every other unit at once, ready to copy.
1 恒星月等于多少默冬章？How many Metonic cycle (19 tyr) in 1 sidereal month?
1 mo sid = 0.003936838184 Metonic（按国际定义系数）。1 mo sid = 0.003936838184 Metonic (international definition).
如何把恒星月换算成默冬章？How do I convert sidereal month to Metonic cycle (19 tyr)?
结果 = 数值 × 0.003936838184。例如 1 mo sid = 0.003936838184 Metonic。result = value × 0.003936838184. Example: 1 mo sid = 0.003936838184 Metonic.
恒星月/默冬章属于哪类单位？What kind of units are sidereal month/Metonic cycle (19 tyr)?
二者同属「时间」量纲，可安全互算；也可打开「time-unit-converter」做多单位对照。Both are time units; see also the time unit converter hub.
换算系数准确吗？Are the conversion factors exact?
「恒星月 ↔ 默冬章」采用国际单位制（SI）或公认标准中的定义值作为换算系数，结果保留约 10 位有效数字。The Sidereal month to Metonic cycle (19 tyr) uses factors defined by the SI or other recognised standards and shows about 10 significant digits.
「恒星月 ↔ 默冬章」免费吗？需要注册吗？Is the Sidereal month to Metonic cycle (19 tyr) free? Do I need an account?
「恒星月 ↔ 默冬章」完全免费，无需注册或安装，打开网页即可使用，手机和电脑都能用；输入的内容只在你的浏览器本地处理。The Sidereal month to Metonic cycle (19 tyr) is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.