[tz] What's "right"?

Steve Allen sla at ucolick.org
Sat Nov 14 02:29:59 UTC 2020

On Fri 2020-11-13T15:51:49-0800 Paul Eggert hath writ:
>  It would hardly be worth the trouble, I'd think. It may well make
> sense, though, for some astronomical applications to do the conversion
> "correctly", when interpreting historical astronomical data.

For the past 25 years the range residuals to Mars fall inside an
envelope 2 meters big.  Similarly tight ranges apply for every other
planet that has had an orbiter or lander.  Trying to construct an
epemeris by adding in older observations does not improve the result,
it only adds noise.

Not even for astronomical purposes is the exact nature of the
time around 1970/1972 relevant.

Steve Allen                    <sla at ucolick.org>              WGS-84 (GPS)
UCO/Lick Observatory--ISB 260  Natural Sciences II, Room 165  Lat  +36.99855
1156 High Street               Voice: +1 831 459 3046         Lng -122.06015
Santa Cruz, CA 95064           https://www.ucolick.org/~sla/  Hgt +250 m

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