2019 January 26, 13:23:20 UT Orbital elements: P/2018 Y2 (Africano) Epoch 2018 Dec. 28.0 TT = JDT 2458480.5 T 2019 Jan. 2.76423 TT Sato q 3.8938734 (2000.0) P Q n 0.04820314 Peri. 162.53098 -0.17555355 -0.96786659 a 7.4774322 Node 297.25818 +0.87732512 -0.07083869 e 0.4792499 Incl. 11.68513 +0.44663362 -0.24128020 P 20.45 From 45 observations 2018 Dec. 10-2019 Jan. 4, mean residual 0".38. Epoch 2019 Feb. 6.0 TT = JDT 2458520.5 T 2019 Jan. 2.74675 TT Sato q 3.8938709 (2000.0) P Q n 0.04821170 Peri. 162.52873 -0.17550831 -0.96787374 a 7.4765473 Node 297.25774 +0.87732832 -0.07079483 e 0.4791886 Incl. 11.68546 +0.44664511 -0.24126443 P 20.44 Residuals in seconds of arc 181210 G96 0.1+ 0.2- 181231 G96 0.2- 0.2+ 190101 B49 0.1- 0.2- 181210 G96 0.1+ 0.3- 181231 G96 1.0+ 0.3+ 190101 B49 0.0 0.5+ 181210 G96 0.1+ 0.1- 181231 L01 0.9- 0.5+ 190101 B49 0.0 0.2+ 181210 G96 0.1+ 0.2- 181231 L01 0.5- 0.1+ 190101 Z80 0.9- 0.6- 181217 D29 0.1- 0.5+ 181231 L01 0.4- 0.1+ 190101 Z80 0.6- 0.3- 181217 D29 0.1- 0.3+ 181231 L01 0.1- 0.1+ 190101 Z80 0.5+ 1.1- 181217 D29 0.3- 0.2+ 181231 K88 0.0 0.1+ 190101 Z80 1.1+ 0.8- 181231 G96 0.0 0.1+ 181231 K88 0.4+ 0.1+ 190101 106 0.4+ 0.1+ 181231 G96 0.0 0.1- 190101 G40 0.7- 0.1+ 190102 106 0.9+ 0.5- 181231 G96 0.1- 0.1+ 190101 G40 0.3- 0.3- 190102 106 0.5+ 0.3- 181231 G96 0.1+ 0.1+ 190101 H06 0.2- 0.0 190102 568 0.4+ 0.0 181231 G96 0.1+ 0.2+ 190101 H06 0.1- 0.1+ 190102 568 0.4+ 0.0 181231 G96 0.1+ 0.2+ 190101 C77 0.4- 0.1- 190102 568 0.4+ 0.1+ 181231 G96 0.1- 0.2+ 190101 C77 0.0 0.6+ 190104 349 0.6- 0.4+ 181231 G96 0.2- 0.1- 190101 C77 0.2+ 0.1- 190104 349 0.2- 0.2- 2019 January 3, 05:42:13 UT Orbital elements: P/2018 Y2 (Africano) Epoch 2018 Dec. 28.0 TT = JDT 2458480.5 T 2018 Dec. 20.80754 TT Sato q 3.8747836 (2000.0) P Q n 0.04781272 Peri. 160.32589 -0.14102762 -0.97390049 a 7.5180823 Node 297.43085 +0.87936724 -0.04070743 e 0.4846048 Incl. 11.55884 +0.45477959 -0.22329517 P 20.61 From 43 observations 2018 Dec. 10-2019 Jan. 2, mean residual 0".36. Epoch 2019 Feb. 6.0 TT = JDT 2458520.5 T 2018 Dec. 20.78888 TT Sato q 3.8747789 (2000.0) P Q n 0.04782122 Peri. 160.32347 -0.14097920 -0.97390647 a 7.5171917 Node 297.43040 +0.87936905 -0.04066087 e 0.4845444 Incl. 11.55916 +0.45479109 -0.22327757 P 20.61 --