ELEMENTS FROM THE IAU MINOR PLANET CENTER (B. Marsden) follow below.
JPL orbital element estimates
(link to JPL Satellite mean orbits web page) -- calculated by R. Jacobson, JPL
Bill Gray's orbital estimates at
www.projectpluto.com.
Gray's summary table from the above web page
Orbits at a glance:
Incl Node Peri ecc a P H dia* Arc
(deg) (deg) (deg) (AU) (yrs) (mag) (km)
Phoebe 173.2 263.0 352.1 .175 .086 1.49 6.9 240 1904-1999
S/2000 S 1 172.8 206.5 39.6 .363 .153 3.53 11.9 20 7 Aug 00-20 Sep 01
S/2000 S 2 46.1 351.9 239.6 .458 .101 1.89 11.5 25 7 Aug 00-19 Sep 01
S/2000 S 3 48.6 63.7 63.9 .361 .119 2.42 10.2 45 23 Sep 00-22 Oct 01
S/2000 S 4 34.9 94.5 284.8 .634 .119 2.44 12.5 16 23 Sep 00-10 Sep 01
S/2000 S 5 48.4 352.1 91.8 .160 .076 1.23 12.3 17 7 Aug 00-24 Aug 01
S/2000 S 6 49.4 151.4 70.5 .367 .076 1.24 12.8 14 23 Sep 00-19 Sep 01
S/2000 S 7 174.9 246.4 88.6 .557 .134 2.91 14.0 7 23 Sep 00-20 Sep 01
S/2000 S 8 148.6 285.3 210.6 .215 .104 1.98 13.8 8 23 Sep 00-20 Sep 01
S/2000 S 9 169.7 79.6 295.8 .229 .126 2.64 14.1 7 23 Sep 00-19 Sep 01
S/2000 S 10 33.7 142.8 284.8 .612 .119 2.42 13.3 10 23 Sep 00-19 Sep 01
S/2000 S 11 37.2 110.2 60.2 .472 .109 2.13 10.9 30 9 Nov 00-23 Oct 01
S/2000 S 12 174.7 253.2 76.2 .109 .132 2.83 14.0 7 23 Sep 00-19 Sep 01
Incl Node Peri ecc a P H dia Arc
Magnitude at opposition = H + 9.5 (roughly).
* Diameters assumes a 5% albedo, like that of Phoebe.
ELEMENTS FROM THE IAU MINOR PLANET CENTER (B. Marsden) follow below.
S/2000 S 1 Epoch 2001 Oct. 18.0 TT = JDT 2452200.5 Marsden, MPC 43761 M 43.96653 (2000.0) P Q n 0.27101350 Peri. 42.43394 -0.96178900 +0.26769460 a 0.1557901 Node 207.06661 +0.20483381 +0.84277990 e 0.3746580 Incl. 172.74556 +0.18167284 +0.46697072 P 3.64 H 12.3 P/d 1328.35 >From 22 observations 2000 Aug. 7-2001 Sept. 20, mean residual 0".27. S/2000 S 2 Epoch 2001 Oct. 18.0 TT = JDT 2452200.5 Marsden, MPC 43761 M 285.44829 (2000.0) P Q n 0.52565537 Peri. 241.98116 -0.56911221 +0.81281589 a 0.1001689 Node 350.02901 -0.22887340 -0.30174411 e 0.4618653 Incl. 45.86246 -0.78976468 -0.49827786 P 1.88 H 11.9 P/d 684.86 >From 37 observations 2000 Aug. 7-2001 Sept. 19, mean residual 0".27. S/2000 S 3 Epoch 2001 Oct. 18.0 TT = JDT 2452200.5 Marsden, MPC 43761 M 95.76220 (2000.0) P Q n 0.39267207 Peri. 65.94181 -0.36204168 -0.64644029 a 0.1216691 Node 63.72412 +0.30906902 -0.76296193 e 0.3804753 Incl. 48.50265 +0.87943287 +0.00201216 P 2.51 H 10.6 P/d 916.80 >From 30 observations 2000 Sept. 23-2001 Oct. 22, mean residual 0".37. S/2000 S 4 Epoch 2001 Oct. 18.0 TT = JDT 2452200.5 Marsden, MPC 43761 M 154.77653 (2000.0) P Q n 0.40004074 Peri. 285.65578 +0.77015795 -0.28445672 a 0.1201704 Node 93.78833 +0.51406928 +0.80667948 e 0.6125237 Incl. 34.90118 -0.37761025 +0.51802760 P 2.46 H 12.8 P/d 899.91 >From 29 observations 2000 Sept. 23-2001 Sept. 19, mean residual 0".25. S/2000 S 5 Epoch 2001 Oct. 18.0 TT = JDT 2452200.5 Marsden, MPC 43761 M 336.24529 (2000.0) P Q n 0.80071134 Peri. 91.25720 +0.07279153 -0.99165052 a 0.0756629 Node 351.81548 +0.30839329 +0.12387767 e 0.1658184 Incl. 48.39259 +0.94846980 +0.03582689 P 1.23 H 12.5 P/d 449.60 >From 29 observations 2000 Aug. 7-2001 Aug. 24, mean residual 0".25. S/2000 S 6 Epoch 2001 Oct. 18.0 TT = JDT 2452200.5 Marsden, MPC 43761 M 191.01573 (2000.0) P Q n 0.79645970 Peri. 70.72990 -0.58802797 +0.72065932 a 0.0759319 Node 150.96758 -0.63222997 -0.69271858 e 0.3592355 Incl. 49.17794 +0.50448822 -0.02812674 P 1.24 H 13.2 P/d 452.00 >From 33 observations 2000 Sept. 23-2001 Sept. 19, mean residual 0".40. S/2000 S 7 Epoch 2001 Oct. 18.0 TT = JDT 2452200.5 Marsden, MPEC 2001-X20 M 214.91469 (2000.0) P Q n 0.34200174 Peri. 86.55527 -0.93427770 +0.34717761 a 0.1334079 Node 246.25373 +0.28165470 +0.85828007 e 0.5653018 Incl. 174.91079 +0.21862253 +0.37791934 P 2.88 H 14.3 P/d 1052.63 >From 23 observations 2000 Sept. 23-2001 Nov. 15, mean residual 0".29. S/2000 S 8 Epoch 2001 Oct. 18.0 TT = JDT 2452200.5 Marsden, MPC 43761 M 76.91155 (2000.0) P Q n 0.50103889 Peri. 207.64737 +0.14527958 +0.85351278 a 0.1034235 Node 285.50739 +0.97626698 -0.04155986 e 0.2117209 Incl. 148.71370 +0.16061331 -0.51941190 P 1.97 H 14.2 P/d 718.51 >From 20 observations 2000 Sept. 23-2001 Sept. 20, mean residual 0".29. S/2000 S 9 Epoch 2001 Oct. 18.0 TT = JDT 2452200.5 Marsden, MPC 43761 M 352.52507 (2000.0) P Q n 0.38593448 Peri. 299.99185 -0.75174332 +0.63596805 a 0.1230811 Node 79.91956 +0.64946869 +0.66812939 e 0.2123419 Incl. 169.79520 +0.11433456 +0.38619653 P 2.55 H 14.5 P/d 932.80 >From 20 observations 2000 Sept. 23-2001 Sept. 19, mean residual 0".30. S/2000 S 10 Epoch 2001 Oct. 18.0 TT = JDT 2452200.5 Marsden, MPC 43761 M 210.08040 (2000.0) P Q n 0.40576657 Peri. 290.50996 +0.25496039 -0.88998984 a 0.1190372 Node 138.09421 +0.95282042 +0.29783277 e 0.6093181 Incl. 34.47206 -0.16470714 +0.34527339 P 2.43 H 13.6 P/d 887.21 >From 25 observations 2000 Sept. 23-2001 Sept. 19, mean residual 0".29. S/2000 S 11 Epoch 2001 Oct. 18.0 TT = JDT 2452200.5 Marsden, MPC 43761 M 327.01603 (2000.0) P Q n 0.45678422 Peri. 59.56192 -0.81360891 -0.09590439 a 0.1100001 Node 109.23802 +0.02349051 -0.99091872 e 0.4562334 Incl. 37.39920 +0.58093780 -0.09424671 P 2.16 H 11.4 P/d 788.12 >From 31 observations 2000 Nov. 9-2001 Oct. 23, mean residual 0".48. S/2000 S 12 Epoch 2001 Oct. 18.0 TT = JDT 2452200.5 Marsden, unpublished M 178.85568 (2000.0) P Q n 0.36302172 Peri. 73.04856 -0.99602125 +0.00349891 a 0.1282071 Node 252.91753 -0.03446862 +0.90633393 e 0.1443129 Incl. 174.65474 +0.08218022 +0.42254770 P 2.72 H 14.5 P/d 991.68 >From 25 observations 2000 Sept. 23-2001 Nov. 15, mean residual 0".30.