Nakano Note (Nakano wa Kangaeru noda) NK 2981 C/2015 D4 (Borisov)

The following improved orbital elements, S. Nakano, are from 44 observations 2015 Feb. 23 to June 21. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.78 arc second. The comet has passed 2.18 AU from Jupiter on 2014 Jan. 1 UT. Epoch = 2014 Oct. 30.0 TT T = 2014 Oct. 28.25046 +/- 0.00318 (m.e.) TT Peri. = 314.69830 +/- 0.00557 Node = 305.80844 +/- 0.00052 (2000.0) Inc. = 77.30096 +/- 0.00031 q = 0.8616484 +/- 0.0001022 AU e = 0.9891568 +/- 0.0000429 1/a = +0.0125843 +/- 0.0000498 1/AU a = 79.46 AU P = 708.4 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2015/ 150302 G40 0.1- 0.2- 150319 461 0.7- 0.8- 150223 L51 (6.7- 0.9-) 150305 G40 0.3+ 0.1+ 150319 461 1.3- 0.9- 150223 L51 1.0- 1.3+ 150305 G40 0.4+ 0.5- 150319 461 0.8- 0.6- 150223 L51 (3.6+ 3.1+) 150308 L04 (0.3- 2.0-) 150319 461 0.8- 0.1- 150225 L51 1.3+ 0.5- 150308 L04 0.6- 0.4- 150327 H06 0.5- 0.7+ 150225 L51 0.8- 0.4+ 150308 L04 0.5+ 0.2- 150327 H06 0.1+ 0.3+ 150226 L96 (0.8- 2.9+) 150310 H06 1.2+ 1.5- 150327 H06 0.4+ 0.1+ 150226 L96 0.9- 1.2+ 150310 H06 0.8+ 1.3- 150329 349 0.3- 1.5+ 150226 L96 0.6+ 0.3+ 150310 H06 0.5+ 1.3- 150329 349 1.5- 0.2+ 150226 L96 0.0 0.4+ 150312 H06 1.0+ 1.7+ 150410 461 0.6- 0.6- 150227 L96 0.2+ 1.0- 150312 H06 1.4+ 1.8+ 150410 461 0.3+ 0.3- 150227 L96 0.2+ 0.5- 150312 H06 1.6+ 1.7+ 150422 215 (1.8+ 3.2+) 150227 L96 0.7- 1.0- 150317 461 0.1+ 0.6+ 150422 215 1.2+ 0.4+ 150301 H06 0.5- 0.1+ 150317 461 0.3- 0.8- 150422 215 (0.2- 3.0-) 150301 H06 0.5- 0.6+ 150317 461 1.0+ 0.4+ 150620 J01 0.3- 0.6- 150301 H06 0.7- 0.3+ 150318 461 0.4- 0.4- 150620 J01 0.1+ 0.6+ 150302 G40 0.3+ 0.3- 150318 461 0.3- 0.8- 150621 J01 0.1+ 0.1- ( ) -------- Rejected Obs.

Associate of the CBAT Syuichi Nakano 2015 July 30

Back to Nakano Note Page