2018 December 22, 14:55:52 UT Orbital elements: C/2018 Y1 (Iwamoto) T 2019 Feb. 4.82680 TT Sato q 1.2543089 (2000.0) P Q Peri. 357.42963 -0.85309234 +0.48745922 Node 146.13710 +0.48446477 +0.60764308 e 1.0 Incl. 160.49382 +0.19371976 +0.62701945 >From 28 observations 2018 Dec. 18-22, mean residual 0".49. Residuals in seconds of arc 181218 872 (0.7- 3.7+)Y 181220 H06 0.6- 0.2- 181220 X89(10.9- 0.4-) 181218 872 0.2- 1.2+ Y 181220 H06 0.6+ 0.1+ 181221 W96 0.8+ 0.4+ 181219 349 0.9- 0.2- 181220 H06 0.3+ 0.6- 181221 W96 0.1- 0.0 181219 349 0.5- 0.5- 181220 H06 0.3+ 0.3+ 181221 W96 0.3+ 0.0 181219 349 0.4- 1.1- 181220 T03 0.9+ 0.5+ 181221 D95 0.1- 0.2- 181220 W88 0.6+ 0.6- 181220 T03 0.9+ 0.3+ 181221 D95 0.1- 0.6- 181220 W88 0.2+ 0.1- 181220 T03 1.1+ 0.2+ 181221 D95 0.3- 0.4- 181220 H06 0.0 0.2+ 181220 349 0.7- 0.0 181222 W96 0.6- 0.4+ 181220 H06 0.2- 0.1- 181220 349 0.8- 0.1- 181222 W96 0.5- 0.2+ 181220 H06 0.2+ 0.2+ 181220 349 0.4- 0.4+ 181222 W96 0.4+ 0.3+ 2018 December 21, 08:44:39 UT Orbital elements: C/2018 Y1 (Iwamoto) T 2019 Feb. 2.39589 TT Sato q 1.2200664 (2000.0) P Q Peri. 356.63627 -0.84636195 +0.49659820 Node 144.66319 +0.49609829 +0.60352231 e 1.0 Incl. 160.55818 +0.19379868 +0.62381972 >From 19 observations 2018 Dec. 18-20, mean residual 0".53. 2018 December 20, 21:45:19 UT Orbital elements: C/2018 Y1 (Iwamoto) = IF032 T 2019 Jan. 25.51936 TT Sato q 1.1225637 (2000.0) P Q Peri. 353.32001 -0.83024460 +0.51500834 Node 139.88036 +0.52549327 +0.59563460 e 1.0 Incl. 160.67782 +0.18587826 +0.61642991 >From 15 observations 2018 Dec. 19-20, mean residual 0".39. L = 146.2, B = -2.2. l = 326.2, b = +2.2, rA = 1.126 AU, rD = 330.717 AU. 2018 December 20, 05:47:21 UT Orbital elements: IF032 T 2018 Dec. 15.8995 TT Sato q 0.779987 (2000.0) P Q Peri. 314.5995 -0.8951597 +0.3089485 Node 114.1139 +0.4378825 +0.7442924 e 1.0 Incl. 159.3885 -0.0833551 +0.5920976 From 5 observations 2018 Dec. 18-19, mean residual 0".60. --