[AstroPy] Using astropy.time for 'deep time'?

[Aldcroft, Thomas]

On Tue, Apr 22, 2014 at 10:45 PM, wbpython <wbpython at gmail.com> wrote:

> Hello,
>
> I'm doing plots of planetary and spacecraft positions using a modern
> ephemeris.  However, as part of these plots, I want to show planet trails
> going back 100 years or more for outer planets and Kuiper Belt objects.
>
> I've tried using astropy.time to define dates going back 100 years or more
> but it seems to not work, or at least not match the documentation.
>

Can you provide examples of what you tried, how it didn't work, and the
documentation that doesn't seem to match your experience?

Thanks,
Tom


> In the documentation, it states that time has sufficient precision for
> nano-second accuracy over the age of the universe.  It seems like it should
> be adequate for these types of 'deep time' computations, unless this full
> range is not implemented.
>
> Has anyone used astropy.time as a time-keeper for extremely long time
> computations that need connection to modern time systems?
>
> Thanks,
> Tom
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