Re: [find_orb] Re: asteroid (70401) davidbishop - check residuals

Jost Jahn Feb 5, 2013

About twenty years ago when I have enough time to programming I wrote a
program for the good old Atari ST to check all virtual (at the sphere)
and physical (in space) encounters of al known numbered asteroids at
this time.

My trick was to divide the sphere in many small slightly overlapping
patches and the space in many small cubes (but not too small) and then
calculate for one day all asteroids and sorting them into those patches
in sphere and in space (just the designation). The calculation was very
rough, about 1/10 precision of those patches. These patches and cubes
was just 1-byte in a relational file. I count the number of objects up
and saved the name in a seper ate reational file.

Then I must only make a run through all those patches and each patch
(byte value>2), which has more than 1 object I calculated much more
precise. Because I don`t take gravitational perturbances into account
the result was not good, but nice enough.

Today with computing power I would do the same and when I run throug all
sphere patches and cubes I would do then (not before) a precise
calcultion with gravitational perturbations.

I think this reduce the computing time very good. I need only some days
to run a complete year for all asteroids on the golld old Atari ST

Just my two cents...
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