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Re: Julian Day Numbers [message #22548 is a reply to message #22430]

Wed, 15 November 2000 00:00

Vapuser
Messages: 63
Registered: November 1998

Member

Craig Markwardt <craigmnet@cow.physics.wisc.edu> writes:

<snip>

> There are other conventions, at least in astronomy. The Modified
> Julian Day (MJD) and Truncated Julian Day (TJD) are very similar time
> systems, the only difference being the zero-point. Thankfully these
> systems subtract the 0.5 day that makes standard Julian days so
> complicated and confusing. [ A day changeover at *noon* ??? ]

But I thought the Julian Day was created by astronomers to prevent a
day changeover in the middle of the night, i.e. during one observing
session! Have I been living a lie all this time!

I feel *so used*!

whd
--
William Daffer: 818-354-0161: William.Daffer@jpl.nasa.gov

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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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