2017 December 31, 01:20:36 UT Orbital elements: C/2017 Y2 (PANSTARRS) T 2020 July 29.15242 TT Sato q 3.7592235 (2000.0) P Q Peri. 150.50374 -0.23298905 -0.67344576 Node 57.69859 -0.97218493 +0.14354635 e 1.0 Incl. 123.90079 +0.02392817 -0.72516567 From 8 observations 2017 Dec. 24-26, mean residual 0".22. Residuals in seconds of arc 171224 F51 0.2- 0.0 171225 568 0.0 0.0 171226 291 0.5- 0.2+ 171224 F51 0.0 0.0 171225 568 0.0 0.0 171226 291 0.6+ 0.2- 171224 F51 0.2+ 0.0 171225 568 0.1- 0.0 --