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.Orbital elements for natural satellites are planet-barycentric.
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
