> My look was a little too quick. I was looking for the constant 400, and saw
> only 100 and 4, but by first dividing by 100 and then by 4, the years
> divisible by 400 are turned into leap years, as they should be!
>
> For another question. How are the decimal parts of the JD numbers to be
> interpreted? I always assumed JD no's were integers.
The decimal part are fractions of a day, remembering that the day
starts at Noon.
JD's in this format are normally used for orbit calculations of
various objects, but they can be pressed into service for any other
purpose you feel like.
Andy
