October 05, 2007A12:18:37 UT Orbital elements: P/2007 S1 (Zhao) T 2007 Dec. 13.34409 TT Sato q 2.4956189 (2000.0) P Q n 0.13244779 Peri. 247.07823 +0.87257207 -0.48418133 a 3.8115906 Node 141.79411 +0.47769860 +0.81810348 e 0.3452552 Incl. 6.00492 +0.10208838 +0.31028234 P 7.44 From 45 observations 2007 Sept. 8-Oct. 1, mean residual 0".86. Residuals in seconds of arc 070908 699 0.6+ 0.6+ 070920 701 0.6- 1.7- 070921 D29 0.2+ 0.5- 070908 699 0.9- 0.9+ 070920 701 (3.6+ 3.3+) 070921 D29 0.7- 0.1+ 070908 699 0.5+ 0.2+ 070920 701 1.3- 0.5- 070921 D29 0.8- 0.5+ 070908 699 0.0 0.4- 070920 H06 (2.4+ 0.2-) 070921 D29 0.3+ 0.3+ 070915 699 0.7+ 0.3- 070920 H06 1.5+ 0.3+ 070921 585 (3.3- 0.6+) 070915 699 1.0- 0.4- 070920 473 (2.7+ 0.2+) 070921 585 1.9+ 1.5- 070915 699 1.3- 0.3- 070920 235 0.1- 0.4+ 070921 585 (3.1+ 0.5-) 070917 D29 0.0 0.4- 070920 473 1.0+ 0.3+ 070921 585 (0.7+ 4.2-) 070917 D29 0.0 0.3- 070920 235 0.3+ 0.1- 070923 H55 0.8+ 1.1- 070917 D29 0.1- 0.2+ 070920 473 0.5+ 0.3+ 070923 H55 1.0+ 0.3- 070917 D29 1.5+ 1.3- 070920 235 1.1+ 1.1- 070923 H55 1.1+ 0.5+ 070919 473 0.2+ 0.3+ 070921 D29 0.2- 1.0+ 070924 291 1.4+ 1.9+ 070919 473 0.2- 0.2+ 070921 D29 0.6+ 0.1- 070924 291 0.6- 1.0+ 070919 473 0.5+ 0.4+ 070921 D29 0.7- 0.3- 070924 291 1.1- 0.9+ 070919 204 1.7- 1.1+ 070921 349 1.0- 0.3+ 071001 585 0.4+ 0.3- 070920 204 0.8+ 0.1- 070921 D29 0.9- 0.3+ 071001 585 0.7+ 0.5- 070920 701 1.9- 1.7- 070921 349 0.6- 1.1+ 071001 585 1.9- 0.1+ September 21, 2007A15:10:46 UT Orbital elements: P/2007 S1 (Zhao) T 2007 Dec. 10.41964 TT Sato q 2.5022543 (2000.0) P Q n 0.13218886 Peri. 246.05887 +0.88008588 -0.47038446 a 3.8165663 Node 141.91075 +0.46479671 +0.82563229 e 0.3443703 Incl. 6.02120 +0.09701992 +0.31156023 P 7.46 From 25 observations 2007 Sept. 8-20, mean residual 0".75. --