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Export Format for Natural Satellite Orbits

This document describes the format used for orbits of natural satellites, as used in the Natural Satellites Observers Page.

The column headed `F77' indicates the Fortran 77 format specifier that should be used to read the specified value.

   Columns   F77    Use

    1 -  12  a12    Number or provisional designation
                      (in packed form)

   14 -  18  a5     Epoch (in packed form, .0 TT)

   20 -  32  f13.5  Time of perihelion (JDT)

   34 -  42  f9.5   Argument of perihelion, J2000.0 (degrees)
   44 -  52  f9.5   Longitude of the ascending node, J2000.0
                      (degrees)
   54 -  62  f9.5   Inclination to the ecliptic, J2000.0 (degrees)

   64 -  72  f9.7   Orbital eccentricity
   74 -  82  f9.7   Periapsis distance (AU)

   84 -  85  i2     Central body (05 = Jupiter, 06 = Saturn,
                      07 = Uranus, 08 = Neptune)
   87 -  91  f5.2   Absolute magnitude, H

   93 -  98  i6     Observed arc (days)
  100 - 104  i5     Number of observations

  106 - 108  a3     Orbit computer
  110 - 118  a9     Publication reference

  120 - 124  a5     Date (UT) of first included observation (in packed form)
  126 - 130  a5     Date (UT) of last included observation (in packed form)

  132 - 136  f5.2   r.m.s residual (")
  138 - 140  a3     Coarse indicator of perturbers
  142 - 144  a3     Precise indicator of perturbers
                    (blank if unperturbed one-opposition object)
  146 -      a      Name of satellite

MPC