Ephemeris Accuracy:
Low:
Choose this if you want to use the low precision to compute
planets positions.
Precision is then 1 minute of arc from -300 years to 300 years from 1969.
You must notice that the equations used are trigonometric series that diverge for
date outside this range.
The precision will fall to several degrees and may be totaly wrong for planet
like Pluto for date too far from 1969.
Medium:
Based on a truncated version of VSOP87 / ELP2000-82B
High:
Proastro compute the planet positions from the binary file based on the
DE406 theory.
Positions are interpolated from those saved in the binary file.
Precision is supposed to be exact from -3000 to +3000.
For old past date, you must notice that difference between UT and ET (TD), the
delta time, is not known
with great precision.
Path to binary file:
The path to the binary file. You can generate this binary file from the JPL CDROM with the jpl.exe program.
See also: