(140) Siwa
Orbital Elements
The following orbital elements are taken from MPC 25033:(140) Siwa Epoch 2000 Feb. 26.0 TT = JDT 2451600.5 (M-c) Bowell M 332.75414 (2000.0) P Q n 0.21825351 Peri. 195.71761 +0.54551270 +0.83641890 a 2.7320914 Node 107.36947 -0.76282479 +0.52175969 e 0.2160076 Incl. 3.18925 -0.34715161 +0.16783994 P 4.52 H 8.34 G 0.15 U 0 From 116 observations at 35 oppositions, 1877-1994, mean residual 0".88.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 2000 06 15 21 36.30 -15 12.4 1.416 2.143 122.8 23.5 11.9 2000 06 20 21 38.44 -15 13.0 1.371 2.143 127.1 22.2 11.7 2000 06 25 21 39.87 -15 17.7 1.328 2.142 131.5 20.8 11.6 2000 06 30 21 40.54 -15 26.6 1.289 2.142 136.2 19.2 11.5 2000 07 05 21 40.44 -15 39.7 1.254 2.142 141.1 17.4 11.4 2000 07 10 21 39.59 -15 56.8 1.222 2.143 146.1 15.3 11.3 2000 07 15 21 38.02 -16 17.5 1.196 2.144 151.3 13.2 11.2 2000 07 20 21 35.78 -16 41.4 1.174 2.145 156.7 10.8 11.0 2000 07 25 21 32.94 -17 07.8 1.157 2.146 162.2 8.3 10.9 2000 07 30 21 29.60 -17 35.7 1.145 2.148 167.7 5.8 10.8 2000 08 04 21 25.90 -18 04.3 1.140 2.150 173.2 3.2 10.6 2000 08 09 21 22.02 -18 32.5 1.140 2.153 177.0 1.4 10.5 2000 08 14 21 18.11 -18 59.3 1.146 2.156 173.7 2.9 10.6 2000 08 19 21 14.34 -19 23.8 1.158 2.159 168.3 5.4 10.8 2000 08 24 21 10.88 -19 45.3 1.176 2.163 162.8 8.0 10.9 2000 08 29 21 07.85 -20 03.4 1.200 2.167 157.3 10.4 11.1 2000 09 03 21 05.41 -20 17.5 1.229 2.171 151.8 12.7 11.2 2000 09 08 21 03.63 -20 27.4 1.263 2.175 146.6 14.8 11.4 2000 09 13 21 02.59 -20 33.2 1.301 2.180 141.5 16.7 11.5 2000 09 18 21 02.30 -20 34.9 1.344 2.185 136.6 18.4 11.6 2000 09 23 21 02.77 -20 32.6 1.390 2.191 131.8 20.0 11.8
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