On 5/15/2017 1:45 AM, Mike Horvath wrote:
> On 5/12/2017 8:10 AM, Bald Eagle wrote:
>>
>> Here's the animation of the solar system over one Earth year.
>>
>> I just worked out a fast and efficient approximation for apsidal
>> (orbital)
>> precession last night. (not that it will make any noticeable effect)
>>
>> Still need to look up a bunch of things and do some further editing on
>> the code
>> before it gets fleshed out.
>>
>> Not sure how I ought to place the planets - so I just started at full
>> syzygy.
>> I may trace out the orbits in a future version.
>>
>
> I tried modeling the solar system once in another program. I could never
> figure out the "starting point" of each planet's revolution in time.
> I.e. whether GMT is "aligned" correctly with respect to the sun and the
> rest of the solar system.
>

If you want to be that accurate then search for "The equation of time". 
That will give you the four days of the year when local time is the same 
as solar time.

http://www.sundials.co.uk/equation.htm

> I was unable to find this data in the source I looked in. IIRC there was
> some sort of online database that you could access using queries, and it
> would spit out the data relative to a chosen epoch. Can't remember the
> name of the database now.
>

That would be handy.


-- 

Regards
     Stephen

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