[LEAPSECS] Reliability

[Tony Finch]

On Fri, 2 Jan 2009, Magnus Danielson wrote:

> blb8 at po.cwru.edu skrev:

> >

> > That's 303*365+97*366=146097 days for an average of 365.2425 days per year.

>

> Your arthmetic describes solar days, but fails to describe the sidereal days.


No, he's talking about calendar years, as opposed to the conventional
astronomical year of 365.25 days that Rob mentioned. The latter is often
the unit for the time co-ordinate in ephemerides and is not supposed to
model the length of the earth's orbit.

Tony.
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