May 30, 2015A20:35:22 UT Orbital elements: C/2015 J2 (PANSTARRS) = P10l0Zk Epoch 2015 Sept. 15.0 TT = JDT 2457280.5 T 2015 Sept. 8.90649 TT Sato q 4.3204083 (2000.0) P Q z +0.0040399 Peri. 203.68806 -0.18118818 +0.95154860 +/-0.0000400 Node 56.75545 -0.84815339 -0.02331750 e 0.9825459 Incl. 17.28145 -0.49780184 -0.30661305 From 61 observations 2015 Mar. 21-May 21, mean residual 0".44. 1/a = +0.0040399, Q = 490.74 AU, L =259.5, B = -6.9. Epoch 2015 June 27.0 TT = JDT 2457200.5 T 2015 Sept. 8.90487 TT Sato q 4.3204111 (2000.0) P Q z +0.0040637 Peri. 203.68706 -0.18119516 +0.95154474 +/-0.0000400 Node 56.75608 -0.84815271 -0.02331803 e 0.9824432 Incl. 17.28201 -0.49780046 -0.30662497 Residuals in seconds of arc 150321 F51 0.2- 0.2+ 150517 W96 0.6+ 0.1+ 150518 H01 0.4+ 0.4- 150321 F51 0.1+ 0.1- 150517 W96 0.1+ 0.1- 150518 926 0.1- 0.6+ 150321 F51 0.1- 0.2+ 150517 W96 0.2- 0.4+ 150518 W96 1.7- 0.1+ 150321 F51 0.3+ 0.1- 150517 W96 0.1- 0.0 150518 W96 1.8- 0.2+ 150419 G96 0.6- 0.0 150517 W95 0.3- 0.2- 150518 H01 0.4+ 0.3- 150419 G96 0.4- 0.1+ 150517 W95 0.1- 0.2- 150518 926 0.3- 0.1+ 150419 G96 0.3- 0.0 150517 807 0.1+ 0.4- 150518 H01 0.2+ 0.6- 150419 G96 0.2+ 0.1+ 150517 807 0.2+ 0.3- 150518 926 1.0- 0.1- 150423 F52 0.1+ 0.1- 150517 W96 0.1- 0.0 150518 F52 0.4+ 0.1- 150423 F52 0.4+ 0.2- 150517 807 0.1+ 0.3- 150518 F52 0.5+ 0.1- 150423 F52 0.3+ 0.2- 150517 W95 0.5- 0.0 150518 F52 0.6+ 0.1- 150515 F51 0.5+ 0.2- 150517 W95 0.6+ 0.0 150518 Q62 0.6- 1.0+ 150515 F51 0.4+ 0.1- 150517 I93 0.4- 0.0 150518 Q62 0.9- 0.7+ 150515 F51 0.3+ 0.2- 150517 I93 0.0 0.0 150519 926 0.2+ 0.2+ 150516 568 0.6+ 0.5- 150518 I93 0.0 0.3+ 150519 926 0.1+ 0.3+ 150516 568 0.6+ 0.5- 150518 W96 0.1- 0.3+ 150519 926 1.3- 0.5+ 150516 568 0.5+ 0.5- 150518 W96 0.2+ 0.1- 150521 F51 0.3+ 0.3- 150516 J87 1.0+ 0.2- 150518 926 0.2- 0.5+ 150521 F51 0.5+ 0.3- 150516 J87 0.4+ 0.3- 150518 926 0.1+ 0.4+ 150521 F51 0.4+ 0.3- 150516 J87 0.0 0.8+ 150518 926 0.6- 0.4+ 150516 J87 0.1+ 0.1+ 150518 H01 0.2+ 0.3- May 18, 2015A12:58:30 UT Orbit-1 Orbital elements: P10l0Zk T 2015 Oct. 31.87914 TT Sato q 4.3541783 (2000.0) P Q z -0.0045789 Peri. 210.93568 -0.05531643 +0.96252679 Node 57.16246 -0.83926083 +0.09922129 e 1.0199374 Incl. 18.41962 -0.54090790 -0.25238325 From 27 observations 2015 May 15-18, mean residual 0".28. Orbit-2 Orbital elements: (P10l0Zk) T 2015 Mar. 2.29203 TT Sato q 4.116291 (2000.0) P Q Peri. 174.2626 -0.6362836 +0.7391805 Node 55.9994 -0.7179658 -0.4626718 e 1.0 Incl. 15.4467 -0.2822556 -0.4894355 >From 27 observations 2015 May 15-18, mean residual 0".33. --