May 04, 2015A09:37:50 UT Orbital elements: C/2015 H2 (PANSTARRS) = P10kNSr T 2016 July 1.97274 TT Sato q 6.3089083 (2000.0) P Q n 0.01352437 Peri. 260.92686 -0.18500119 +0.98250701 a 17.4471575 Node 357.99458 -0.47363826 -0.10815002 e 0.6383991 Incl. 37.53432 -0.86106989 -0.15160323 P 72.88 From 30 observations 2015 Apr. 20-30, mean residual 0".68. 1/a = +0.0573159, Q = 28.59 AU, L = 256.6, B = -37.0. Residuals in seconds of arc 150420 W98 0.5+ 0.6- 150425 W96 0.2- 1.0+ 150427 W96 0.2+ 0.8- 150420 W98 0.4+ 0.6- 150425 W96 0.3- 0.1+ 150427 W96 0.6+ 0.1+ 150424 F51 0.4- 0.8+ 150425 W96 0.4- 0.4- 150427 568 0.1+ 0.9- 150424 F51 0.8- 0.8+ 150426 W96 0.4+ 1.2- 150427 568 0.2+ 0.9- 150424 F51 0.4- 0.8+ 150426 W96 0.1- 0.2+ 150427 568 0.3+ 0.9- 150424 F51 0.7- 0.7+ 150426 W96 0.2- 0.7+ 150427 Q62 0.5+ 1.2- 150425 807 0.5- 0.6+ 150427 Y00 0.2+ 0.1- 150427 Q62 0.8+ 1.2- 150425 807 0.1- 0.7+ 150427 Y00 0.0 0.2- 150427 Q62 0.8+ 0.8- 150425 807 0.4- 0.5+ 150427 Y00 0.3+ 0.8- 150430 W96 1.0- 1.8+ 150425 W96 0.1+ 1.2+ 150427 W96 0.7+ 0.6- 150430 W96 0.6- 1.2+ April 29, 2015A15:57:26 UT Orbital elements: P10kNSr T 2015 Sep. 13.53922 TT Sato q 6.8798483 (2000.0) P Q n 0.01697558 Peri. 235.28209 -0.56017583 +0.82832189 a 14.9940707 Node 0.83796 -0.38382090 -0.24962355 e 0.5411621 Incl. 39.31977 -0.73408756 -0.50156847 P 58.06 From 28 observations 2015 Apr. 20-27, mean residual 0".36. April 26, 2015A14:30:46 UT Orbital elements: P10kNSr T 2015 July 16.39257 TT Sato q 7.0210008 (2000.0) P Q n 0.01751560 Peri. 230.00708 -0.61855343 +0.78530660 a 14.6842828 Node 2.31755 -0.36190183 -0.25516849 e 0.5218697 Incl. 40.34010 -0.69743725 -0.56407675 P 56.27 From 16 observations 2015 Apr. 20-26, mean residual 0".37. --