2018 June 15, 16:28:54 UT Orbital elements: C/2018 EN4 (NEOWISE) Epoch 2018 June 11.0 TT = JDT 2458280.5 T 2018 June 7.78681 TT Sato q 1.4478631 (2000.0) P Q n 0.01249599 Peri. 35.01867 -0.64908873 +0.33070581 a 18.3917159 Node 136.16641 +0.23885788 -0.76641264 e 0.9212763 Incl. 81.56098 +0.72224008 +0.55067716 P 78.87 From 63 observations 2018 Mar. 9-June 12, mean residual 0".43. Epoch 2018 July 21.0 TT = JDT 2458320.5 T 2018 June 7.78764 TT Sato q 1.4478657 (2000.0) P Q n 0.01249781 Peri. 35.01935 -0.64908561 +0.33071695 a 18.3899303 Node 136.16663 +0.23884746 -0.76641296 e 0.9212686 Incl. 81.56114 +0.72224633 +0.55067002 P 78.86 Residuals in seconds of arc 180309 C51 0.1+ 0.6+ 180315 Q62 0.2- 0.0 180517 H06 0.2+ 0.1+ 180309 C51 0.7- 0.3+ 180315 Q62 0.4- 0.1+ 180517 H06 0.1+ 0.2+ 180309 C51 0.8- 0.2+ 180316 474 0.7- 0.7+ 180517 568 0.2- 0.2+ 180309 C51 1.7+ 0.2+ 180316 474 0.2- 0.1- 180517 568 0.2- 0.2+ 180309 C51 0.9- 0.3- 180316 474 0.4+ 0.4+ 180601 H06 0.1+ 0.1+ 180313 807 0.3+ 0.2+ 180317 I11 0.2+ 0.3+ 180601 H06 0.2- 0.0 180313 807 0.1+ 0.2+ 180317 I11 0.1+ 0.2+ 180601 H06 0.2- 0.0 180313 807 0.1+ 0.0 180317 I11 0.2+ 0.3+ 180603 H06 0.4- 0.1+ 180313 691 1.0+ 1.0- 180317 I11 0.0 0.4+ 180603 H06 0.6- 0.3+ 180313 691 1.4+ 0.1- 180322 568 0.2+ 0.0 180603 H06 0.0 0.5+ 180313 691 0.0 0.1- 180322 568 0.2+ 0.0 180604 A71 0.2- 0.2- 180313 204 0.6+ 0.2- 180322 568 0.1+ 0.0 180604 A71 0.5- 0.1- 180313 204 0.1- 0.3+ 180322 568 0.3+ 0.0 180605 G40 0.4- 0.6- 180314 H21 0.0 0.4- 180513 U69 0.1+ 0.5+ 180605 G40 0.1+ 0.5- 180314 H21 0.2- 0.3- 180513 U69 0.1- 0.1+ 180605 G40 0.6+ 0.2- 180314 H21 0.1- 0.5- 180514 H06 0.5+ 0.1+ 180609 204 0.0 0.4- 180314 I52 1.7- 0.4- 180514 H06 0.2+ 0.0 180609 204 0.2- 0.3- 180314 I52 0.4- 0.3- 180514 H06 0.2- 0.3- 180609 204 0.0 0.1- 180314 I52 0.1- 0.6- 180515 G40 0.2+ 1.0- 180612 Q11 0.3+ 0.4+ 180314 I52 0.4- 0.0 180515 G40 0.0 0.3- 180612 Q11 0.6+ 0.5+ 180315 Q62 0.1- 0.0 180515 G40 0.3- 0.4+ 180612 Q11 0.4+ 0.3+ 2018 May 22, 03:39:57 UT Orbital elements: 2018 EN4 Epoch 2018 June 11.0 TT = JDT 2458280.5 T 2018 June 7.78084 TT Sato q 1.4479319 (2000.0) P Q n 0.01247040 Peri. 35.01330 -0.64910387 +0.33064690 a 18.4168649 Node 136.16543 +0.23894611 -0.76638659 e 0.9213801 Incl. 81.56202 +0.72219728 +0.55074878 P 79.04 From 42 observations 2018 Mar. 9-May 15, mean residual 0".47. --