HORIZONS Time Spans Available
This page shows available HORIZONS ephemeris time spans
for the group of bodies selected from the menu on the left.
Data are available only for bodies accessible
The time-spans available are shown below in the Barycentric Dynamical Time (TDB) scale
(the uniform time scale and independent variable of the ephemerides), not UT.
| Object || Available Time Span || Ephemeris File |
|small-bodies || 1599-Dec-12 to 2500-Dec-30 || DE431 |
All asteroid and comet ephemerides are numerically integrated with respect to JPL planetary ephemeris DE431 and thus limited to its available time span.