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Re: Julian Day Numbers [message #22574 is a reply to message #22430]

Tue, 14 November 2000 00:00

davidf
Messages: 2866
Registered: September 1996

Senior Member

J.D. Smith (jdsmith@astro.cornell.edu) writes:

> IDL just cribbed the code from Numerical recipes, which itself cribbed
> the code from somewhere else. They state: "A convenient reference
> points is that Julian Day 2440000 began at noon of May 23, 1968". If
> you give that a try, you find IDL has correctly implemented the NR
> routine. This leaves the question of the Astronomical Almanac. Since
> virtually everyone agrees (there are hundreds of julian calculators on
> the net) on the julian scale but AA, we have to presume (horrors), that
> it is in error.

Maybe we should hand count the days until we get it right. :-)

Cheers,

David
--
David Fanning, Ph.D.
Fanning Software Consulting
Phone: 970-221-0438 E-Mail: davidf@dfanning.com
Coyote's Guide to IDL Programming: http://www.dfanning.com/
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[Message index]

		Julian Day Numbers By: Ben Tupper on Tue, 14 November 2000 00:00
		Re: Julian Day Numbers By: Vapuser on Wed, 15 November 2000 00:00
		Re: Julian Day Numbers By: James Kuyper on Wed, 15 November 2000 00:00
		Re: Julian Day Numbers By: LC's No-Spam Newsread on Wed, 15 November 2000 00:00
		Re: Julian Day Numbers By: thompson on Tue, 14 November 2000 00:00
		Re: Julian Day Numbers By: Craig Markwardt on Tue, 14 November 2000 00:00
		Re: Julian Day Numbers By: Vapuser on Tue, 14 November 2000 00:00
		Re: Julian Day Numbers By: Craig Markwardt on Tue, 14 November 2000 00:00
		Re: Julian Day Numbers By: davidf on Tue, 14 November 2000 00:00
		Re: Julian Day Numbers By: Ben Tupper on Tue, 14 November 2000 00:00
		Re: Julian Day Numbers By: John-David T. Smith on Tue, 14 November 2000 00:00
		Re: Julian Day Numbers By: Craig Markwardt on Tue, 14 November 2000 00:00
		Re: Julian Day Numbers By: davidf on Tue, 14 November 2000 00:00

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