The ephemeris shows you the positions of the principal bodies in the
Solar System at the selected time, both in
celestial coordinates, and as seen from your specified
observing site for sky and horizon maps.
If you're tracking an
asteroid or comet by specifying its orbital
elements, its position is given at the foot of the table. The
sample ephemeris above gives positions for 00:00 UTC on March 1,
1995, while tracking the Earth-orbit-crossing asteroid 1995 DW1, whose
discovery (on February 25, 1995) was reported in Minor Planet
Electronic Circular 1995-E02 of 00:15 UTC, March 1, 1995, giving
the orbital elements shown at the end of this page.
For each solar system body the following data are displayed:
The first three items give the equatorial celestial coordinates of the
object at the specified time, and its distance from the Earth. These
values are independent of the observing site.
The next three columns give the location of the object in the sky at
the specified observing site. They are not included in displays
from the Virtual Telescope, which
uses celestial coordinates exclusively.