CooC - Coordinate Conversions (version 3.0)
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Time
The time is the UT (Universal Time) corresponding your normal calendar
and clock time (local time zone time). Date is given in an increasing
order of units (day month year) and time in the universal decreasing
order of the units (hour minute second). If more precision is needed,
the seconds can be given with decimal part (although the field for
seconds is only two characters wide, for artistic reasons).
The default time for INPUT coordinates is for epoch J1950.0 (that is:
1st January 1950, at noon).
The default time for OUTPUT coordinates is for epoch J2000.0 (that is:
1st January 2000, at noon). When converting to horizontal or ecliptic
coordinates, the time is actually transformed into Besselian form,
which is very close to tropical time (the real calendar/clock time).
For more information on time and different time systems, please check
the corresponding encyclopædia
article.
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