(85) Io
Orbital Elements
The following orbital elements are taken from MPO 31791(85) Io Epoch 2002 Nov. 22.0 TT = JDT 2452600.5 Goffin M 292.99832 (2000.0) P Q n 0.22811307 Peri. 122.49722 +0.82124934 +0.56457166 a 2.6527883 Node 203.45212 -0.56785364 +0.79465528 e 0.1928343 Incl. 11.96579 -0.05560369 +0.22311839 P 4.32 H 7.61 G 0.15 U 0 From 946 observations at 71 oppositions, 1865-2002, mean residual 0".57.An explanation of the orbital elements is available.
These orbital elements are also available in forms suitable for loading into a number of popular planetarium-type software programs.
Ephemeris
The following ephemeris is at intervals of five days. A daily ephemeris covering the same time interval is also available.
Date TT R. A. (2000) Decl. Delta r Elong. Phase V 2003 05 11 20 40.79 -03 33.0 1.855 2.231 98.0 26.6 11.9 2003 05 16 20 45.65 -02 41.5 1.795 2.224 101.2 26.5 11.8 2003 05 21 20 50.03 -01 50.5 1.736 2.218 104.5 26.2 11.7 2003 05 26 20 53.90 -01 00.5 1.678 2.212 107.9 25.8 11.6 2003 05 31 20 57.22 -00 11.8 1.623 2.206 111.5 25.3 11.5 2003 06 05 20 59.96 +00 35.1 1.569 2.200 115.1 24.7 11.4 2003 06 10 21 02.08 +01 19.4 1.517 2.194 118.8 23.9 11.3 2003 06 15 21 03.58 +02 00.8 1.468 2.189 122.6 23.0 11.2 2003 06 20 21 04.41 +02 38.5 1.421 2.184 126.5 22.0 11.1 2003 06 25 21 04.57 +03 11.9 1.377 2.179 130.5 20.8 11.0 2003 06 30 21 04.04 +03 40.2 1.337 2.174 134.6 19.4 10.9 2003 07 05 21 02.85 +04 02.7 1.300 2.170 138.7 18.0 10.8 2003 07 10 21 01.02 +04 18.6 1.267 2.166 142.9 16.5 10.7 2003 07 15 20 58.61 +04 27.5 1.239 2.163 146.9 14.9 10.6 2003 07 20 20 55.70 +04 28.9 1.215 2.159 150.7 13.3 10.5 2003 07 25 20 52.38 +04 22.5 1.196 2.156 154.2 11.8 10.4 2003 07 30 20 48.78 +04 08.2 1.182 2.153 156.9 10.6 10.3 2003 08 04 20 45.04 +03 46.2 1.174 2.151 158.7 9.9 10.3 2003 08 09 20 41.32 +03 17.2 1.171 2.148 159.1 9.7 10.2 2003 08 14 20 37.79 +02 41.9 1.173 2.147 158.0 10.2 10.3 2003 08 19 20 34.57 +02 01.3 1.181 2.145 155.7 11.2 10.3 2003 08 24 20 31.81 +01 16.7 1.195 2.144 152.6 12.6 10.4 2003 08 29 20 29.61 +00 29.3 1.214 2.143 148.8 14.1 10.5 2003 09 03 20 28.08 -00 19.7 1.237 2.142 144.7 15.8 10.6 2003 09 08 20 27.29 -01 09.0 1.266 2.142 140.5 17.4 10.7 2003 09 13 20 27.25 -01 57.4 1.298 2.142 136.2 19.0 10.8 2003 09 18 20 27.99 -02 44.1 1.335 2.142 132.0 20.4 10.9 2003 09 23 20 29.49 -03 28.2 1.375 2.142 127.7 21.7 11.0 2003 09 28 20 31.76 -04 09.3 1.419 2.143 123.6 22.9 11.1 2003 10 03 20 34.75 -04 46.6 1.466 2.144 119.6 23.9 11.2 2003 10 08 20 38.43 -05 19.9 1.515 2.146 115.6 24.8 11.3 2003 10 13 20 42.75 -05 49.0 1.567 2.148 111.8 25.6 11.4 2003 10 18 20 47.66 -06 13.6 1.620 2.150 108.1 26.1 11.5 2003 10 23 20 53.11 -06 33.8 1.676 2.152 104.5 26.6 11.6 2003 10 28 20 59.06 -06 49.4 1.733 2.155 100.9 26.9 11.7 2003 11 02 21 05.47 -07 00.5 1.791 2.158 97.5 27.1 11.8 2003 11 07 21 12.28 -07 07.2 1.850 2.161 94.1 27.2 11.8
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