Re: Progress with time

[Cary Chleborad <bennu@ns.net>]

Tom Droege wrote:
> 
> Below is the algorithm that Cary sent me.  If I crank in the data, and use
> the mjd formula,
> then I come out 1/2 day off by some dates the Jure sent me:
> 
> 2001-03-11 at 0 UT should come out 2451979.5
> 2000-01-01 at 12:00 should be 2451545
> 
> To match these two dates, I have to add .5 to the formula below.  Can
> anyone check this?
> 
> Note I am putting in the 4 digit year and month without adding the one as
> indicated in the code below.
> 
> Tom Droege
> 


Hmm.  It seems like every time I go through the MJD/JD thing that .5 day
thing pops up.  Of course, it's been long enough since I last solved the
problem I can't remember the exact details with the .5 day.  Just off
the top of my head I do remember that the formula is extremely sensitive
to all of those casts and parens controlling the order of evaluation. 
Check those out.

I have to run up to Home Depot then finish fixing the side gate before
the sun sets here in CA.  After that I'll jump on this problem with you
- we'll get it working.

-Cary