2020 January 20, 06:04:44 UT Orbital elements: C/2020 A2 (Iwamoto) Epoch 2020 Feb. 1.0 TT = JDT 2458880.5 T 2020 Jan. 8.39936 TT Sato q 0.9791612 (2000.0) P Q z -0.0035243 Peri. 68.25662 -0.35134321 -0.44299205 +/-0.0015455 Node 286.33895 -0.76625949 +0.64226350 e 1.0034508 Incl. 120.73668 +0.53796314 +0.62550430 From 74 observations 2020 Jan. 9-19, mean residual 0".64. Epoch 2020 Feb. 1.0 TT = JDT 2458880.5 T 2019 Dec. 9.31267 TT Sato q 1.8241288 (2000.0) P Q n 0.14176467 Peri. 213.55972 -0.22902498 -0.93846562 a 3.6427054 Node 250.85619 +0.94241896 -0.14727884 e 0.4992379 Incl. 15.88145 +0.24370898 -0.31239595 P 6.95 Residuals in seconds of arc 200108 872 (5.2- 3.3-)Y 200114 H01 0.7+ 0.2- 200115 L34 0.8+ 0.2- 200108 872 (0.9+ 5.6-)Y 200114 H06 0.4+ 0.5- 200115 950 0.4+ 0.4+ 200109 C42 0.3- 0.8+ 200114 H06 0.6- 0.4- 200115 G40 0.2- 0.3- 200110 C42 1.3- 0.2- 200114 H06 0.5+ 0.8- 200115 950 0.3+ 0.2+ 200110 C42 1.2+ 0.3- 200114 H06 1.4- 0.4- 200115 G40 0.4- 0.4- 200113 L51 1.6+ 0.0 200114 H01 0.5+ 0.3- 200115 950 0.1- 0.0 200113 L51 (0.0+ 3.2-) 200114 H06 0.3+ 0.5- 200115 G40 0.1- 0.6- 200113 L51 (1.5+ 2.4-) 200114 H06 0.5+ 0.9+ 200115 349 0.8- 0.4+ 200113 403 0.1+ 0.6+ 200114 H06 0.3+ 0.8- 200115 349 0.7- 0.2+ 200113 403 0.9+ 0.5- 200114 H01 0.4+ 0.2- 200116 A77 0.1+ 1.0+ 200113 D88 0.4- 0.8+ 200114 G96 0.1+ 0.1- 200116 A77 0.1+ 1.9+ 200113 403 (0.3- 2.9+) 200114 G96 0.2+ 0.6+ 200116 A77 0.2- 0.8+ 200113 D88 0.4- 1.2+ 200114 G96 0.3- 0.2- 200116 D95 0.1- 0.4- 200113 403 (1.7+ 2.1+) 200114 I52 0.8+ 0.6+ 200116 D95 0.2- 0.2- 200114 A71 0.4- 0.3- 200114 I52 0.1- 0.5+ 200116 D95 0.2- 0.4- 200114 A71 0.4- 1.0+ 200114 I52 1.4- 0.4+ 200118 G20 0.9+ 1.6- 200114 A71 0.4- 0.6+ 200114 G96 0.0 0.1+ 200118 A77 0.1- 0.8- 200114 A71 0.1- 0.3+ 200114 D74 1.0- 1.3+ 200118 G20 0.8+ 0.4- 200114 A71 1.2+ 0.1- 200114 D74 0.4- 0.0 200118 G20 0.3- 0.3- 200114 A71 0.1- 0.1- 200115 L34 0.2+ 0.2- 200118 A77 0.0 1.8+ 200114 970 0.3+ 1.7- 200115 L34 0.8+ 0.5- 200118 A77 0.2+ 0.8+ 200114 970 0.3+ 1.4- 200115 K61 0.4- 0.2+ 200119 G20 (5.4+ 13.3+) 200114 970 0.4- 0.6- 200115 K61 1.3- 0.6+ 200119 G20 (4.0+ 14.4+) 200114 G40 0.7- 0.9- 200115 K61 0.6- 0.2+ 200119 G20 (3.6+ 15.4+) 200114 G40 0.6- 0.0 200115 K61 0.4- 0.5+ 200119 372 0.2- 0.8+ 200114 G40 0.1+ 0.5- 200115 K61 0.0 0.4- 200119 372 0.2- 0.5- 200114 H01 0.4+ 0.4- 200115 L34 0.3+ 0.1+ 200119 372 0.0 0.5- 200114 H01 0.5+ 0.2- 200115 L34 0.8+ 0.3+ 2020 January 16, 11:1:25 UT Orbital elements: C/2020 A2 (Iwamoto) Epoch 2019 Dec. 23.0 TT = JDT 2458840.5 T 2020 Jan. 8.41627 TT Sato q 0.9814140 (2000.0) P Q z -0.0093629 Peri. 68.14350 -0.35083140 -0.44221135 +/-0.0038881 Node 286.24923 -0.76701346 +0.64138927 e 1.0091273 Incl. 120.70643 +0.53722218 +0.62695210 From 61 observations 2020 Jan. 8-16, mean residual 0".64. 2020 January 14, 04:06:34 UT Orbital elements: IF033 Eccentricity assumed T 2020 Jan. 8.27725 TT Sato q 0.9785437 (2000.0) P Q Peri. 68.10258 -0.35017000 -0.44396094 Node 286.33996 -0.76798976 +0.64019363 e 1.0 Incl. 120.73876 +0.53625805 +0.62693764 From 6 observations 2020 Jan. 8-13, mean residual 0".85. --