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CalendarHome.com - Julian day - Calendar Encyclopedia |
 | | The offset of 0.5 means that MJD started at midnight at the beginning of November 17, 1858, and that every Modified Julian Day begins and ends at midnight UT or TT. |
 | | The Reduced Julian Day (RJD) is also used by astronomers and counts days from the same day as MJD, but from noon UT or TT, and thus is defined as: |
 | | The Truncated Julian Day (TJD) was introduced by NASA for the space program. |
| encyclopedia.calendarhome.com /Julian_date.htm (1325 words) |