March 20, 2015A12:45:54 UT Orbital elements: C/2015 C2 (SWAN) Epoch 2015 Feb. 27.0 TT = JDT 2457080.5 T 2015 Mar. 4.56681 TT Sato q 0.7114140 (2000.0) P Q z +0.0019205 Peri. 334.13790 +0.55805370 +0.33678763 +/-0.0002770 Node 49.52835 +0.82139234 -0.09438978 e 0.9986337 Incl. 94.49581 -0.11785879 +0.93683758 From 53 observations 2015 Feb. 25-Mar. 19, mean residual 0".75. Q = 1040.66 AU, L = 51.7, B = -25.8. Epoch 2015 Apr. 8.0 TT = JDT 2457120.5 T 2015 Mar. 4.56695 TT Sato q 0.7114153 (2000.0) P Q z +0.0019130 Peri. 334.13834 +0.55805641 +0.33678168 +/-0.0002770 Node 49.52840 +0.82139150 -0.09439468 e 0.9986390 Incl. 94.49568 -0.11785180 +0.93683923 Residuals in seconds of arc (or two decimals in units of degrees) 150215 249(0.64+ 0.76+)Y 150227 W96 0.1+ 0.6+ 150311 C23 1.2+ 0.6+ 150216 249(0.30+ 1.06+)Y 150227 W88 0.9+ 0.9+ 150311 C23 0.0 1.2- 150217 249(0.42+ 0.96+)Y 150227 W88 0.2- 0.0 150311 C23 0.1+ 1.1+ 150218 249(0.61+ 0.89+)Y 150227 W88 0.4+ 0.2- 150311 C23 2.0+ 0.0 150219 249(0.41+ 0.90+)Y 150227 W96 (2.7+ 0.3-) 150311 C23 0.2+ 1.3- 150220 249(0.30+ 0.94+)Y 150227 I47 1.5+ 0.4+ 150311 C23 1.0+ 0.1+ 150221 249(0.13- 1.10+)Y 150227 I47 1.0+ 1.1- 150311 C23 (1.3- 4.0+) 150222 249(0.09+ 0.98+)Y 150228 W96 0.2+ 0.3+ 150311 C23 1.1+ 0.3+ 150225 Q80 1.2- 0.8- 150228 W96 0.3- 0.4+ 150311 C23 1.6- 1.5+ 150225 Q80 0.6- 0.1- 150228 W96 0.2- 0.5+ 150313 A77 0.6- 0.3- 150225 Q80 0.7- 0.2- 150228 W96 0.5+ 0.8+ 150313 A77 0.2- 1.5- 150226 W96 0.2+ 0.2- 150228 W96 0.3- 1.0- 150313 A77 0.5+ 0.2+ 150226 W96 0.1+ 0.0 150228 W96 1.5+ 1.0- 150314 349 0.7+ 0.4+ 150226 W96 0.2+ 0.0 150304 D81 0.4- 1.6- 150314 349 0.2- 0.2+ 150226 W96 0.3- 0.2- 150304 D81 1.3- 0.4+ 150314 349 0.2- 0.9+ 150226 W96 0.0 0.1- 150309 C23 0.0 0.2+ 150316 C23 0.5+ 0.0 150226 W96 0.5+ 0.2- 150309 C23 0.7- 1.6- 150316 C23 0.2+ 0.8- 150226 W96 0.3+ 0.3- 150309 C23 0.4- 0.9+ 150316 C23 0.9- 0.7- 150226 Q62 0.6- 0.6+ 150309 C23 1.4- 0.7- 150316 C23 0.9+ 0.7+ 150226 Q62 1.1- 1.0+ 150309 C23 0.1- 0.1+ 150319 372 0.3- 0.0 150227 W96 0.2- 0.7+ 150311 C23 1.1- 1.5+ 150319 372 0.4- 0.0 March 15, 2015A14:46:46 UT Orbital elements: C/2015 C2 (SWAN) = ROB001 = SWAND1 Epoch 2015 Feb. 27.0 TT = JDT 2457080.5 T 2015 Mar. 4.56865 TT Sato q 0.7113911 (2000.0) P Q z +0.0021790 Peri. 334.14186 +0.55805337 +0.33674026 +/-0.0006160 Node 49.53024 +0.82140292 -0.09443685 e 0.9984499 Incl. 94.49586 -0.11778657 +0.93684987 From 42 observations 2015 Feb. 25-Mar. 14, mean residual 0".75. Q = 917.15 AU, L = 51.7, B = -25.8. Epoch 2015 Apr. 8.0 TT = JDT 2457120.5 T 2015 Mar. 4.56880 TT Sato q 0.7113923 (2000.0) P Q z +0.0021716 Peri. 334.14230 +0.55805609 +0.33673430 +/-0.0006160 Node 49.53029 +0.82140208 -0.09444175 e 0.9984552 Incl. 94.49574 -0.11777958 +0.93685152 March 14, 2015A11:27:58 UT Orbital elements: C/2015 C2 (SWAN) = ROB001 = SWAND1 Epoch 2015 Feb. 27.0 TT = JDT 2457080.5 T 2015 Mar. 4.56935 TT Sato q 0.7113491 (2000.0) P Q z +0.0025982 Peri. 334.14288 +0.55801793 +0.33675572 Node 49.53222 +0.82143155 -0.09446695 e 0.9981517 Incl. 94.49882 -0.11775484 +0.93684128 From 38 observations 2015 Feb. 25-Mar. 11, mean residual 0".75. Q = 769.02 AU, L = 51.7, B = -25.8. Orbital elements: ROB001 = C/2015 D2 (SWAN) ? T 2015 Mar. 4.49371 TT Sato q 0.7110433 (2000.0) P Q z +0.0075909 Peri. 333.95292 +0.55668170 +0.34033721 Node 49.48954 +0.82191035 -0.09310149 e 0.9946025 Incl. 94.62661 -0.12070158 +0.93568301 From 19 observations 2015 Feb. 25-27, mean residual 0".52. February 25, 2015A15:34:54 UT Orbital elements: ROB001 = C/2015 D2 (SWAN) ? T 2015 Mar. 5.42111 TT Sato q 0.7047625 (2000.0) P Q n 0.01071544 Peri. 336.09228 +0.56246908 +0.31043773 a 20.3764848 Node 50.20681 +0.82254769 -0.11601394 e 0.9654130 Incl. 94.16858 -0.08392756 +0.94348777 P 91.98 From 12 observations 2015 Feb. 25-26, mean residual 0".40. --