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・ Half-life (disambiguation)
・ Half-Life (film)
・ Half-Life (novel)
・ Half-Life (series)
・ Half-Life (video game)
・ Half-Life 2
・ Half-Life E.P.
・ Half-life of knowledge
・ Half-logistic distribution
・ Half-Man (fairy tale)
・ Half-mast
・ Half-maximal concentration
・ Half-metal
・ Half-Mile Telescope
・ Half-Minute Hero
Half-month
・ Half-Moon Inn
・ Half-moon switch
・ Half-Mute
・ Half-normal distribution
・ Half-open file
・ Half-orc
・ Half-pass
・ Half-pay
・ Half-period ratio
・ Half-Pint (disambiguation)
・ Half-pipe
・ Half-Pipe Hustle
・ Half-pipe skiing
・ Half-precision floating-point format


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Half-month : ウィキペディア英語版
Half-month
A half-month is a unit of time typically used in astronomy. Each month is separated into two parts:
*days 1–15,
*day 16 until the end of the month.
Unidentified celestial objects, such as comets and asteroids, are given designations that contains the half-month as a letter of the English alphabet. For example, an object seen in the second half of January would be identified with the letter B; if seen in the first half of February, the letter would be C. The letter I is not used, to prevent confusion with the number 1. Instead, the letters proceed from H (April 16-30) to J (May 1-15).
== See also ==

* Provisional designation in astronomy
* Naming of comets
* Fortnight

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Half-month」の詳細全文を読む



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