In most cases, these elements have been calculated here at Lowell Observatory. As the MPC prefers that we not redistribute their orbital elements, you will find that they are missing from the SLOP output table. If you need MPC elements, they are available directly from the MPC . The observations and covariance matrices are not available for those asteroids using MPC orbital elements, so the ephemeris uncertainties for those asteroids cannot be calculated. Those fields are returned as blanks.
Some fields have a sequence of asterisks in place of a number.
The asterisks mean that the number was larger than the space available for the field. This commonly occurs for fields containing an ephemeris uncertainty. The table is presented in units that we, at Lowell, have found useful. We hope you find the useful too. It is our custom to imply that arcseconds, arcminutes and degrees are used with Declination and these angles are always proportional to arclength on the sky.