(71) Niobe
Orbital Elements
The following orbital elements are taken from MPO 2601(71) Niobe Epoch 2002 May 6.0 TT = JDT 2452400.5 Williams M 7.47800 (2000.0) P Q n 0.21553093 Peri. 267.41674 -0.66854113 +0.69150747 a 2.7550510 Node 316.13186 -0.42153099 -0.65548096 e 0.1753675 Incl. 23.25596 -0.61266988 -0.30358216 P 4.57 H 7.30 G 0.40 U 0 From 292 observations at 41 oppositions, 1864-2000, mean residual 0".86.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 2002 02 15 15 03.22 -43 11.6 2.055 2.282 90.1 25.6 11.5 2002 02 20 15 09.85 -44 31.2 2.001 2.280 93.2 25.7 11.4 2002 02 25 15 16.06 -45 49.9 1.948 2.278 96.2 25.6 11.4 2002 03 02 15 21.79 -47 07.4 1.896 2.277 99.3 25.4 11.3 2002 03 07 15 26.94 -48 23.6 1.846 2.275 102.4 25.2 11.3 2002 03 12 15 31.44 -49 38.2 1.797 2.274 105.5 24.9 11.2 2002 03 17 15 35.18 -50 50.7 1.749 2.273 108.7 24.5 11.1 2002 03 22 15 38.07 -52 00.8 1.704 2.272 111.9 24.0 11.1 2002 03 27 15 40.01 -53 07.8 1.661 2.272 115.1 23.4 11.0 2002 04 01 15 40.92 -54 11.1 1.621 2.272 118.3 22.8 10.9 2002 04 06 15 40.72 -55 09.7 1.583 2.272 121.5 22.1 10.8 2002 04 11 15 39.33 -56 02.8 1.548 2.272 124.6 21.3 10.8 2002 04 16 15 36.75 -56 49.0 1.517 2.273 127.6 20.5 10.7 2002 04 21 15 33.00 -57 27.1 1.489 2.274 130.5 19.6 10.7 2002 04 26 15 28.21 -57 56.0 1.464 2.275 133.2 18.8 10.6 2002 05 01 15 22.53 -58 14.5 1.444 2.276 135.7 18.0 10.6 2002 05 06 15 16.20 -58 21.9 1.428 2.278 137.8 17.3 10.5 2002 05 11 15 09.51 -58 17.4 1.416 2.280 139.5 16.7 10.5 2002 05 16 15 02.80 -58 00.9 1.408 2.282 140.7 16.3 10.5 2002 05 21 14 56.42 -57 33.0 1.405 2.284 141.3 16.1 10.5 2002 05 26 14 50.66 -56 54.6 1.407 2.287 141.3 16.1 10.5 2002 05 31 14 45.75 -56 06.9 1.414 2.290 140.6 16.3 10.5 2002 06 05 14 41.87 -55 11.7 1.425 2.293 139.4 16.7 10.5 2002 06 10 14 39.12 -54 10.4 1.441 2.296 137.7 17.3 10.5 2002 06 15 14 37.55 -53 04.9 1.461 2.299 135.6 18.0 10.6 2002 06 20 14 37.15 -51 57.0 1.486 2.303 133.1 18.8 10.7 2002 06 25 14 37.88 -50 48.1 1.515 2.307 130.4 19.6 10.7 2002 06 30 14 39.64 -49 39.5 1.548 2.311 127.5 20.4 10.8 2002 07 05 14 42.38 -48 32.2 1.584 2.316 124.4 21.2 10.9 2002 07 10 14 45.99 -47 27.0 1.624 2.320 121.2 22.0 10.9 2002 07 15 14 50.42 -46 24.4 1.668 2.325 118.0 22.7 11.0 2002 07 20 14 55.56 -45 24.9 1.714 2.330 114.8 23.3 11.1 2002 07 25 15 01.35 -44 28.8 1.763 2.335 111.5 23.9 11.2 2002 07 30 15 07.70 -43 35.9 1.814 2.341 108.3 24.3 11.3 2002 08 04 15 14.55 -42 46.3 1.868 2.346 105.1 24.7 11.3 2002 08 09 15 21.86 -41 59.9 1.923 2.352 101.9 24.9 11.4 2002 08 14 15 29.58 -41 16.5 1.981 2.358 98.7 25.1 11.5 2002 08 19 15 37.65 -40 35.8 2.040 2.364 95.6 25.2 11.6 2002 08 24 15 46.04 -39 57.6 2.100 2.371 92.5 25.2 11.6
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