(7) Iris
Orbital Elements
The following orbital elements are taken from MPC 24084:
(7) Iris
Epoch 2003 Dec. 27.0 TT = JDT 2453000.5 (M-c) Bowell
M 82.35566 (2000.0) P Q
n 0.26727790 Peri. 145.33722 +0.70236205 -0.70548942
a 2.3868622 Node 259.83645 +0.62937767 +0.67765523
e 0.2300271 Incl. 5.52223 +0.33252263 +0.20752848
P 3.69 H 5.51 G 0.15
From 3313 observations at 57 oppositions, 1850-1993, 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 12 22 11 37.36 -03 59.6 2.163 2.427 93.2 23.9 10.2 2003 12 27 11 40.48 -04 34.5 2.110 2.439 97.4 23.6 10.2 2004 01 06 11 45.02 -05 34.5 2.004 2.464 106.0 22.6 10.1 2004 01 11 11 46.37 -05 59.1 1.953 2.476 110.6 21.8 10.0 2004 01 16 11 47.07 -06 19.7 1.903 2.488 115.4 20.9 9.9 2004 01 21 11 47.08 -06 35.9 1.855 2.500 120.3 19.9 9.8 2004 01 26 11 46.39 -06 47.4 1.811 2.512 125.4 18.6 9.8 2004 01 31 11 45.01 -06 53.9 1.770 2.524 130.6 17.2 9.7 2004 02 05 11 42.93 -06 55.3 1.732 2.536 136.0 15.7 9.6 2004 02 10 11 40.21 -06 51.4 1.700 2.547 141.6 13.9 9.5 2004 02 15 11 36.87 -06 42.1 1.672 2.559 147.2 12.1 9.4 2004 02 20 11 33.00 -06 27.6 1.650 2.570 152.9 10.1 9.3 2004 02 25 11 28.70 -06 08.1 1.634 2.581 158.6 8.0 9.2 2004 03 01 11 24.09 -05 44.2 1.625 2.592 164.0 6.0 9.1 2004 03 06 11 19.30 -05 16.6 1.623 2.603 168.7 4.3 9.0 2004 03 11 11 14.48 -04 46.1 1.628 2.614 171.1 3.4 9.0 2004 03 16 11 09.76 -04 13.5 1.640 2.624 169.6 3.9 9.0 2004 03 21 11 05.28 -03 40.0 1.659 2.635 165.3 5.5 9.2 2004 03 26 11 01.16 -03 06.4 1.685 2.645 160.1 7.4 9.3 2004 03 31 10 57.51 -02 33.8 1.718 2.655 154.7 9.3 9.4 2004 04 05 10 54.40 -02 02.9 1.756 2.665 149.2 11.1 9.6 2004 04 10 10 51.89 -01 34.5 1.801 2.675 143.7 12.8 9.7 2004 04 15 10 50.01 -01 09.0 1.851 2.685 138.4 14.4 9.8 2004 04 20 10 48.76 -00 46.8 1.905 2.694 133.2 15.8 9.9 2004 04 25 10 48.17 -00 28.2 1.964 2.703 128.2 17.0 10.0 2004 04 30 10 48.20 -00 13.3 2.026 2.713 123.3 18.1 10.1 2004 05 05 10 48.83 -00 02.3 2.091 2.722 118.6 19.0 10.3 2004 05 10 10 50.04 +00 05.0 2.159 2.730 114.0 19.7 10.4 2004 05 15 10 51.77 +00 08.7 2.229 2.739 109.6 20.3 10.4 2004 05 20 10 54.00 +00 08.8 2.300 2.748 105.4 20.8 10.5 2004 05 25 10 56.70 +00 05.4 2.373 2.756 101.2 21.1 10.6 2004 05 30 10 59.83 -00 01.2 2.447 2.764 97.2 21.3 10.7 2004 06 04 11 03.34 -00 10.8 2.521 2.772 93.4 21.4 10.8
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