(7) Iris
Orbital Elements
The following orbital elements are taken from MPO135420
(7) Iris
Epoch 2008 Nov. 30.0 TT = JDT 2454800.5 MPC
M 204.02081 (2000.0) P Q
n 0.26760687 Peri. 145.29628 +0.70431071 -0.70353678
a 2.3849057 Node 259.71921 +0.62755290 +0.67945515
e 0.2314269 Incl. 5.52742 +0.33184905 +0.20827071
P 3.68 H 5.51 G 0.15 U 0
From 4443 observations at 76 oppositions, 1848-2008, mean residual 0".60.
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.Personalized ephemerides for this object (and others) can be generated using the MPES.
Date TT R. A. (2000) Decl. Delta r Elong. Phase V 2009 04 11 19 09.86 -21 54.9 2.470 2.745 94.9 21.3 10.7 2009 04 16 19 13.62 -21 41.0 2.394 2.736 99.0 21.2 10.6 2009 04 21 19 16.88 -21 27.1 2.319 2.728 103.1 21.0 10.5 2009 04 26 19 19.61 -21 13.6 2.244 2.719 107.3 20.7 10.5 2009 05 01 19 21.77 -21 00.4 2.172 2.710 111.6 20.2 10.4 2009 05 06 19 23.33 -20 47.8 2.101 2.700 116.1 19.6 10.3 2009 05 11 19 24.26 -20 35.9 2.032 2.691 120.6 18.8 10.2 2009 05 16 19 24.53 -20 24.8 1.966 2.681 125.4 17.9 10.1 2009 05 21 19 24.11 -20 14.6 1.903 2.671 130.2 16.8 9.9 2009 05 26 19 22.98 -20 05.3 1.844 2.662 135.3 15.5 9.8 2009 05 31 19 21.14 -19 57.1 1.790 2.652 140.5 14.1 9.7 2009 06 05 19 18.59 -19 49.7 1.740 2.641 145.8 12.5 9.6 2009 06 10 19 15.38 -19 43.3 1.695 2.631 151.3 10.7 9.4 2009 06 15 19 11.54 -19 37.7 1.655 2.620 156.9 8.7 9.3 2009 06 20 19 07.14 -19 32.8 1.622 2.610 162.6 6.7 9.1 2009 06 25 19 02.28 -19 28.4 1.595 2.599 168.3 4.5 9.0 2009 06 30 18 57.08 -19 24.5 1.575 2.588 173.8 2.4 8.8 2009 07 05 18 51.70 -19 21.0 1.561 2.577 176.4 1.4 8.7 2009 07 10 18 46.27 -19 17.6 1.555 2.566 172.2 3.1 8.8 2009 07 15 18 40.94 -19 14.5 1.554 2.554 166.6 5.3 8.9 2009 07 20 18 35.87 -19 11.6 1.561 2.543 160.8 7.6 9.0 2009 07 25 18 31.20 -19 08.9 1.574 2.531 155.0 9.8 9.1 2009 07 30 18 27.07 -19 06.5 1.592 2.519 149.3 11.9 9.2 2009 08 04 18 23.55 -19 04.4 1.616 2.507 143.7 13.8 9.3 2009 08 09 18 20.74 -19 02.6 1.645 2.495 138.3 15.7 9.4 2009 08 14 18 18.67 -19 01.3 1.679 2.483 133.1 17.3 9.5 2009 08 19 18 17.37 -19 00.3 1.716 2.471 128.0 18.8 9.6 2009 08 24 18 16.87 -18 59.7 1.757 2.459 123.0 20.2 9.7 2009 08 29 18 17.15 -18 59.3 1.800 2.446 118.3 21.3 9.8 2009 09 03 18 18.20 -18 59.0 1.846 2.434 113.7 22.3 9.8 2009 09 08 18 19.99 -18 58.8 1.893 2.421 109.3 23.1 9.9 2009 09 13 18 22.48 -18 58.3 1.942 2.408 105.1 23.8 10.0 2009 09 18 18 25.64 -18 57.6 1.992 2.396 101.0 24.3 10.0 2009 09 23 18 29.44 -18 56.3 2.043 2.383 97.0 24.7 10.1 2009 09 28 18 33.83 -18 54.2 2.093 2.370 93.1 25.0 10.1
