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Australia Telescope Compact Array
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Format of an ephemeris file
Below is an example on an ephemeric file.
# ATCA ephemeris file for Comet Hale-Bopp
#
# Positions are Geocentric J2000 (no aberration), but corrected for light travel time.
#
# date Earth UTC TAI R.A. Dec dRA/dT(s/day) dDec/dT("/day) Re/r (")
25-FEB-1997 0:00:00 0:00:30 21:01:27.23100 30:16:25.22300 287.58400 2677.21600 5.68465
25-FEB-1997 6:00:00 6:00:30 21:02:39.12900 30:27:34.53100 290.14400 2683.20000 5.69938
25-FEB-1997 12:00:00 12:00:30 21:03:51.66700 30:38:45.33500 292.70400 2688.80000 5.71420
25-FEB-1997 18:00:00 18:00:30 21:05: 4.84500 30:49:57.53900 295.32800 2694.01600 5.72909
26-FEB-1997 0:00:00 0:00:30 21:06:18.67800 31:01:11.04700 297.98400 2699.16800 5.74405
26-FEB-1997 6:00:00 6:00:30 21:07:33.17600 31:12:25.84200 300.64000 2704.00000 5.75910
26-FEB-1997 12:00:00 12:00:30 21:08:48.33800 31:23:41.84500 303.36000 2708.41600 5.77423
26-FEB-1997 18:00:00 18:00:30 21:10: 4.18000 31:34:58.95200 306.08000 2712.80000 5.78943
27-FEB-1997 0:00:00 0:00:30 21:11:20.70200 31:46:17.15500 308.83200 2716.80000 5.80472
27-FEB-1997 6:00:00 6:00:30 21:12:37.91200 31:57:36.35800 311.68000 2720.38400 5.81624
27-FEB-1997 12:00:00 12:00:30 21:13:55.83400 32:08:56.45600 314.46400 2723.61600 5.83166
27-FEB-1997 18:00:00 18:00:30 21:15:14.45200 32:20:17.36200 317.37600 2726.40000 5.84717
28-FEB-1997 0:00:00 0:00:30 21:16:33.79900 32:31:38.96500 320.28800 2729.60000 5.86277
28-FEB-1997 6:00:00 6:00:30 21:17:53.87300 32:43: 1.36600 323.16800 2731.58400 5.87844
28-FEB-1997 12:00:00 12:00:30 21:19:14.66700 32:54:24.26300 326.14400 2733.63200 5.89025
28-FEB-1997 18:00:00 18:00:30 21:20:36.20500 33:05:47.67300 329.12000 2735.20000 5.90608
Original: Bob Sault
Modified: Bob Sault (28-Mar-2004)