American ephemeris' (1961) on page 71 the definition states:
".... Julian Day Number which is defined to be 0 for the day starting at
Greenwhich mean noon on B.C. 4713 January 1st, Julian proleptic calendar".
Thibaud Chabot
At 17:39 26-04-2003 +1000, you wrote:
Anselmo I have a couple of questions about your UbiSol Julian Date (Julian
Day). The result for 2003/04/26 seems to be at odds with other calculators.
UbiSol = JD 21478.5
Meeus and others = JD 2452755.5
You and other respected references state this date is calculated from
January the 1st 4173 BC. Meeus in his first edition of Astronomical
Algorithms on page 59 states this is calculated from '....... the
beginning of the year -4712'
Can somebody please help me with an explanation ?
Confused of Tasmania
41.5 South 147.1 East
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Th. Taudin Chabot, home email: [EMAIL PROTECTED]
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