January 7, 2017A12:52:41 UT Orbital elements: C/2017 A1 (PANSTARRS) T 2017 May 16.78124 TT Sato q 2.2729867 (2000.0) P Q n 0.00419056 Peri. 1.90067 -0.54370364 -0.53796734 a 38.1026127 Node 121.70607 +0.75968737 -0.64170786 e 0.9403456 Incl. 49.21751 +0.35673724 +0.54662799 P 235.20 From 58 observations 2017 Jan. 2-6, mean residual 0".66. Residuals in seconds of arc 170102 F51 0.3- 0.6- 170103 Q62 1.9- 0.2- 170105 926 0.3- 0.0 170102 F51 0.3- 0.0 170103 Q62 1.5- 0.4+ 170105 926 0.2- 0.7+ 170102 T05 0.7+ 0.4- 170103 K92 0.1- 0.3- 170105 926 0.1+ 0.7+ 170102 T05 (1.1+ 4.8+) 170103 K92 0.3+ 0.4- 170105 Q62 1.0- 0.5- 170102 T05 0.2- 1.7+ 170103 K92 0.1+ 0.2- 170105 Q62 0.2- 0.4- 170102 T05 0.7+ 0.2+ 170103 K92 0.0 0.4- 170105 Q62 0.0 0.4- 170103 926 0.2+ 0.0 170103 595 0.1+ 0.7- 170105 Q62 0.2+ 0.3- 170103 926 0.1- 0.7- 170103 595 0.6+ 0.4+ 170105 Q62 0.0 0.1- 170103 926 0.1+ 0.2+ 170103 A77 0.3+ 1.0+ 170105 Q62 0.4+ 0.0 170103 568 0.0 0.9- 170103 A77 0.7+ 0.9+ 170105 Q62 0.9+ 0.9- 170103 568 0.1+ 0.9- 170103 A77 0.0 0.9+ 170105 Q62 0.0 1.0- 170103 568 0.1+ 0.9- 170103 A77 (1.2- 3.1+) 170105 C10 0.5+ 1.7+ 170103 Q62 0.5+ 0.4- 170104 W96 0.3+ 1.3+ 170105 C10 0.4+ 0.1- 170103 Q62 0.9+ 1.2- 170104 W96 0.1+ 0.4+ 170105 C10 0.3- 0.0 170103 Q62 0.3+ 0.7- 170104 I47 0.5+ 1.9+ 170106 926 0.4+ 0.2+ 170103 Q62 1.0+ 0.9- 170104 I47 0.5+ 1.4+ 170106 926 0.1+ 1.0+ 170103 Q62 0.9- 0.1- 170104 W96 0.4+ 0.2+ 170106 926 0.3- 0.2+ 170103 Q62 0.8- 0.3- 170105 807 0.3- 1.5- 170106 E23 0.2- 0.7- 170103 Q62 0.6- 0.7+ 170105 807 0.1+ 0.8- 170106 E23 0.1+ 0.2+ 170103 Q62 1.2- 0.9+ 170105 807 0.3- 0.2- 170106 E23 0.2- 0.1- January 7, 2017A00:48:53 UT Orbital elements: C/2017 A1 (PANSTARRS) =P10yz57 T 2017 May 16.85442 TT Sato q 2.2769531 (2000.0) P Q Peri. 2.55836 -0.53864489 -0.52909151 Node 120.96343 +0.75879741 -0.64287297 e 1.0 Incl. 49.87603 +0.36618051 +0.55387411 From 54 observations 2017 Jan. 2-6, mean residual 0".65. Orbital elements: P10yz57 T 2017 May 16.83418 TT Sato q 2.2722571 (2000.0) P Q Peri. 2.64524 -0.54046727 -0.52855404 Node 121.03073 +0.75723467 -0.64470647 e 1.0 Incl. 49.81335 +0.36672985 +0.55225374 From 51 observations 2017 Jan. 2-5, mean residual 0".87. --