2021 October 07, 23:16:04 UT Orbital elements: C/2021 S1 (ATLAS) Epoch 2022 June 10.0 TT = JDT 2459740.5 T 2022 June 4.47518 TT Sato q 5.8996475 (2000.0) P Q z +0.0019571 Peri. 158.17663 -0.25215885 -0.67194114 +/-0.0028672 Node 298.93909 +0.72767347 +0.34269620 e 0.9884535 Incl. 52.72260 +0.63789281 -0.65654735 From 71 observations 2021 Aug. 31-Oct. 10, mean residual 0".28. Epoch 2021 Nov. 2.0 TT = JDT 2459520.5 T 2022 June 4.57697 TT Sato q 5.8995905 (2000.0) P Q z +0.0020561 Peri. 158.18774 -0.25224258 -0.67182390 +/-0.0028672 Node 298.93459 +0.72773611 +0.34265820 e 0.9878700 Incl. 52.72829 +0.63778824 -0.65668714 Residuals in seconds of arc 210927 T05 0.1+ 0.3- 210929 L06 0.1- 0.1- 211001 G00 0.0 0.2+ 210927 T05 0.3- 0.7+ 210930 L06 0.0 0.3+ 211001 G00 0.2+ 0.2+ 210927 T05 0.1- 0.7+ 210930 L06 0.0 0.3+ 211001 A77 0.0 0.2+ 210927 T05 0.9+ 0.1+ 210930 K74 0.2- 0.1- 211001 A77 0.2+ 0.3+ 210928 K38 0.1- 0.3+ 210930 K74 0.0 0.0 211001 A77 0.0 0.5- 210928 B49 0.3+ 1.3- 210930 L06 0.1+ 0.2+ 211001 I22 0.5- 0.1+ 210928 B49 0.5- 0.3- 210930 K74 0.1- 0.4- 211001 I22 0.3+ 0.4- 210928 K38 0.4- 0.2- 210930 K74 0.0 0.0 211001 I22 0.2- 0.6- 210928 K38 0.3+ 0.1- 210930 I93 0.1+ 0.2+ 211001 G02 0.7+ 0.2+ 210928 104 0.1+ 0.0 210930 C23 0.1+ 0.3+ 211001 G02 0.3+ 0.1+ 210928 204 0.3+ 0.1+ 210930 C23 0.2- 0.2+ 211001 G02 0.5+ 0.5- 210928 104 0.2- 0.3+ 210930 C23 0.2+ 0.1- 211001 Z80 0.6+ 0.3- 210928 204 0.3+ 0.0 210930 I93 0.1- 0.1- 211001 Z80 0.3+ 0.4- 210928 204 0.2+ 0.3- 210930 G40 0.1- 0.7+ 211001 Z80 0.1+ 0.0 210929 Z08 0.2- 0.1- 210930 G40 1.0+ 0.1- 211002 G40 1.1- 0.0 210929 Z08 0.1- 1.2- 210930 G40 0.3- 0.7+ 211002 G40 0.2- 0.5+ 210929 G40 0.1- 0.8- 210930 G40 0.3+ 0.4+ 211002 G40 0.4- 0.7- 210929 G40 0.7- 0.7- 210930 G18 0.7- 0.4- 211002 G40 0.1+ 0.0 210929 H06 0.3- 0.4- 211001 G18 0.4+ 0.6+ 211002 Q21 1.4- 0.5- 210929 H06 0.4- 0.0 211001 C82 0.3- 0.4+ 211002 Q21 0.7+ 0.1+ 210929 T08 0.6- 0.5+ 211001 595 0.4+ 0.2- 211003 I22 0.4+ 0.2- 210929 T08 0.1- 0.0 211001 C82 0.3- 0.3- 211003 I22 0.1- 0.2- 210929 T08 0.6+ 0.0 211001 595 0.4+ 0.2+ 211003 I22 0.3+ 0.2- 210929 T08 0.4+ 0.5+ 211001 595 0.3+ 0.5- 211004 734 0.5- 0.2- 210929 C10 0.2- 0.5+ 211001 G00 0.0 0.3+ 211004 734 0.1- 0.3- 210929 C10 0.1- 0.7+ 211001 G00 0.1- 0.1+ 211004 349 0.4+ 0.4+ 210929 C10 0.3- 0.7+ 211001 G00 0.3+ 0.0 211004 349 0.1- 0.7+ 2021 October 03, 08:19:16 UT Orbital elements: C/2021 S1 (ATLAS) T 2022 Mar. 3.66958 TT Sato q 6.1133448 (2000.0) P Q Peri. 148.46561 -0.14550992 -0.71429804 Node 299.84182 +0.66076355 +0.44480972 e 1.0 Incl. 52.11010 +0.73635480 -0.54029864 From 72 observations 2021 Sep. 27-Oct. 2, mean residual 0".39. --