(42) Isis
Orbital Elements
The following orbital elements are taken from MPC 22796:(42) Isis Epoch 2001 Apr. 1.0 TT = JDT 2452000.5 (M-c) Bowell M 300.10236 (2000.0) P Q n 0.25838426 Peri. 235.93275 +0.76251095 +0.62986485 a 2.4413236 Node 84.56966 -0.53383931 +0.74159866 e 0.2238744 Incl. 8.53855 -0.36550326 +0.23087161 P 3.81 H 7.53 G 0.15 From 374 observations at 39 oppositions, 1917-1992, mean residual 0".53.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 2001 03 22 17 10.26 -17 21.8 1.855 2.299 103.3 25.0 11.8 2001 03 27 17 14.86 -17 29.8 1.784 2.286 107.1 24.7 11.7 2001 04 01 17 18.94 -17 37.5 1.715 2.273 111.0 24.2 11.6 2001 04 06 17 22.45 -17 45.1 1.647 2.261 115.1 23.6 11.5 2001 04 11 17 25.33 -17 52.9 1.581 2.248 119.3 22.9 11.4 2001 04 16 17 27.53 -18 01.0 1.518 2.236 123.6 21.9 11.2 2001 04 21 17 29.00 -18 09.9 1.457 2.223 128.2 20.8 11.1 2001 04 26 17 29.69 -18 19.7 1.400 2.211 132.8 19.5 11.0 2001 05 01 17 29.57 -18 30.6 1.346 2.199 137.7 18.0 10.8 2001 05 06 17 28.61 -18 42.8 1.297 2.186 142.7 16.2 10.7 2001 05 11 17 26.82 -18 56.5 1.251 2.174 148.0 14.3 10.5 2001 05 16 17 24.21 -19 11.6 1.210 2.162 153.4 12.1 10.3 2001 05 21 17 20.80 -19 28.2 1.175 2.150 158.9 9.7 10.2 2001 05 26 17 16.70 -19 46.1 1.145 2.139 164.7 7.2 10.0 2001 05 31 17 12.01 -20 05.1 1.121 2.127 170.4 4.5 9.8 2001 06 05 17 06.89 -20 25.2 1.102 2.115 176.0 1.9 9.6 2001 06 10 17 01.53 -20 46.0 1.090 2.104 176.5 1.7 9.5 2001 06 15 16 56.11 -21 07.2 1.084 2.093 171.0 4.3 9.7 2001 06 20 16 50.85 -21 28.8 1.083 2.082 165.2 7.2 9.8 2001 06 25 16 45.93 -21 50.7 1.089 2.071 159.3 10.0 9.9 2001 06 30 16 41.58 -22 12.8 1.100 2.061 153.6 12.7 10.1 2001 07 05 16 37.92 -22 35.2 1.116 2.050 148.1 15.2 10.2 2001 07 10 16 35.09 -22 57.9 1.136 2.040 142.7 17.6 10.3 2001 07 15 16 33.15 -23 20.9 1.161 2.030 137.5 19.8 10.4 2001 07 20 16 32.16 -23 44.3 1.189 2.021 132.6 21.7 10.5 2001 07 25 16 32.16 -24 08.1 1.221 2.011 127.9 23.5 10.6 2001 07 30 16 33.16 -24 32.2 1.255 2.002 123.4 25.0 10.7 2001 08 04 16 35.11 -24 56.6 1.292 1.993 119.1 26.4 10.8 2001 08 09 16 37.99 -25 21.2 1.331 1.985 115.0 27.6 10.9 2001 08 14 16 41.77 -25 45.6 1.371 1.977 111.1 28.6 11.0 2001 08 19 16 46.39 -26 09.6 1.413 1.969 107.4 29.4 11.0 2001 08 24 16 51.81 -26 33.2 1.456 1.961 103.8 30.0 11.1 2001 08 29 16 58.00 -26 55.9 1.500 1.954 100.4 30.5 11.2 2001 09 03 17 04.89 -27 17.4 1.545 1.947 97.2 30.9 11.2 2001 09 08 17 12.44 -27 37.6 1.590 1.941 94.0 31.2 11.3
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