Nakano Note (Nakano wa Kangaeru noda) NK 2313 140P/Bowell-Skiff

The following improved orbital elements, by T. Kobayashi, are from 101 observations 1983 to 1999. Perturbations by Mercury to Pluto were taken into account. The mean residual is +/- 1.08 arc seconds. See the previous orbits in NK 634 and MPC 34126. Epoch = 1999 May 22.0 TT T = 1999 May 14.81475 +/- 0.00069 (m.e.) TT Peri. = 173.09964 +/- 0.00047 Node = 343.44600 +/- 0.00056 (2000.0) Inc. = 3.83636 +/- 0.00004 q = 1.9718331 +/- 0.0000111 AU e = 0.6917689 +/- 0.0000013 a = 6.3972548 +/- 0.0000439 AU n' = 0.06091351 +/- 0.00000066 P = 16.180 +/- 0.0001649 years (+/- 0.06 day) T = 1983 Mar. 15.19829 TT Epoch = 1983 Mar. 7.0 TT Peri. = 169.00670 e = 0.6899705 Node = 346.30480 (2000.0) a = 6.2736949 AU Inc. = 3.79898 n'= 0.06272187 q = 1.9450303 AU P = 15.714 years The predicted orbit for the 2015 return is as follows: T = 2015 Aug. 8.64532 TT Epoch = 2015 Aug. 6.0 TT Peri. = 172.94636 e = 0.6919915 Node = 343.39284 (2000.0) a = 6.4534747 AU Inc. = 3.82143 n'= 0.06011926 q = 1.9877250 AU P = 16.394 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1983/ 990107 897 0.5- 0.3- 990308 118 0.1+ 0.9- 830208 330(13.9+ 13.0+) 990107 897 1.0- 0.2- 990316 360 0.4+ 0.0 830211 688 (5.4+ 1.8+) 990109 372 0.2- 1.0+ 990316 360 0.4+ 0.3- 830211 688 (8.7+ 3.3+) 990110 372 0.5+ 0.5+ 990316 372 0.5+ 0.6- 830215 675 (6.4+ 5.4+) 990113 693 0.1+ 0.2- 990317 372 (1.6+ 2.0-) 830215 688 3.5+ 1.7+ 990113 693 0.0 0.2- 990317 118 1.3+ 0.2- 830215 688 (5.6+ 2.5+) 990113 693 0.2+ 0.1- 990317 118 (1.7+ 0.0 ) 830216 801 (6.0+ 3.9+) 990113 360 0.3- 0.3- 990317 118 1.1+ 0.4- 830217 372 (4.2+ 5.3+) 990113 360 0.4- 0.4- 990322 897 0.8+ 0.4- 830217 372 1.5+ 3.1+ 990115 372 0.1- 0.3+ 990322 897 1.0+ 0.3+ 830218 330 (8.8+ 8.0+) 990116 704 (1.5- 1.1-) 990327 046 0.7- 0.5+ 830219 688 (3.3+ 4.3+) 990116 704 0.6- 1.3- 990327 046 0.2- 0.2+ 830219 688 (4.6+ 4.6+) 990116 704 (1.8- 0.2+) 990406 704 0.7- 0.6+ 830219 688 3.5+ 3.6+ 990117 402 0.3- 0.1+ 990406 704 0.1- 0.2+ 830219 688 (5.0+ 3.3+) 990117 402 0.4- 0.0 990406 704 0.3- 0.2+ 830220 675 (3.8+ 4.8+) 990117 402 0.4- 0.1+ 990406 704 0.0 0.7+ 830220 474 2.7+ 3.5+ 990119 704 0.1+ 0.1- 990406 704 (1.1+ 2.4+) 830220 474 3.7+ 2.4+ 990119 704 0.6- 1.2+ 990406 402 1.2- 0.2- 830221 675(10.8+ 7.1+) 990119 704 1.1- 0.2+ 990406 402 0.8- 0.9+ 830221 372 (2.7+ 6.7+) 990119 704 0.4- 0.6+ 990406 402 0.2- 0.0 830221 372 (3.3+ 7.8+) 990119 704 (1.9- 1.7+) 990407 360 0.8- 0.6+ 830303 707 (1.7+ 5.1+) 990121 360 0.3- 0.0 990407 360 0.6- 0.4+ 830304 046 (0.7- 4.7+) 990121 360 0.4- 0.1+ 990410 704 1.3+ 0.6+ 830304 046 (2.4+ 5.1+) 990126 367 0.5- 0.2+ 990410 704 0.8+ 1.3+ 830306 474 (0.6- 4.4+) 990126 367 0.7- 0.0 990410 704 (0.6+ 4.3+) 830306 474 1.9+ 3.3+ 990126 367 0.0 0.2- 990410 704 0.5+ 1.1+ 830309 688 (0.2- 5.6+) 990205 372 0.1+ 1.1+ 990410 704 (0.6+ 2.0+) 830309 688 1.8- 3.3+ 990206 355 0.3+ 0.8+ 990410 704 (1.6+ 0.5-) 830317 688 3.2- 1.8+ 990206 355 0.8+ 0.4+ 990410 704 (1.8- 0.1+) 830318 372 (5.2- 9.6+)Y 990206 355 0.8+ 0.4+ 990410 704 (2.3+ 1.5-) 830321 474 (3.2- 5.7+) 990206 897 0.2+ 1.0- 990410 704 1.3+ 0.0 830321 474 2.5- 3.9+ 990206 897 0.5+ 0.2- 990410 704 (1.2+ 1.7+) 830412 801 (4.9- 8.5+) 990207 900 0.7+ 1.1- 990410 704 (2.1+ 1.3+) 830516 707 (7.3- 7.7+) 990207 900 0.2+ 0.4- 990410 704 (1.8+ 0.5+) 830606 801 (3.9- 9.1+) 990211 372 0.0 0.1+ 990412 693 (2.6- 0.4+) 830609 801 (4.0- 7.3+) 990212 693 0.2+ 0.8- 990412 693 (2.3- 0.5+) 830610 707 (5.9- 6.6+) 990212 693 0.3+ 0.7- 990414 118 0.7- 0.5+ 1998/ 990212 693 0.4+ 0.7- 990414 118 0.7- 0.5+ 981214 704 0.3- 0.7+ 990213 372 0.6+ 0.4- 990414 118 0.2- 0.8+ 981214 704 1.4+ 0.9- 990214 360 0.5+ 0.4- 990505 699 0.7- 1.5+ 981214 704 (0.3+ 2.4-) 990214 360 0.3+ 0.2- 990505 699 (0.8- 1.6+) 981214 704 1.0- 0.3+ 990216 402 0.9+ 0.6- 990505 699 (0.6- 1.6+) 981217 704 1.1- 0.5- 990216 402 0.5+ 0.4- 990505 118 0.7- 0.6- 981217 704 1.1- 0.7- 990222 402 0.7+ 0.3- 990505 118 (1.7- 1.5-) 981217 704 0.1- 1.1- 990222 402 1.0+ 0.6- 990507 360 (2.0- 0.6-) 981217 704 (3.6- 0.5-) 990222 402 1.2+ 0.5- 990507 360 (2.0- 0.1-) 981228 046 0.5- 0.2- 990303 402 1.0+ 0.3- 990508 704 0.5- 0.4- 981228 046 0.4- 0.0 990303 402 0.9+ 0.4- 990508 704 0.2- 1.0- 981228 046 0.3- 0.5- 990303 402 0.9+ 0.0 990508 704 0.5- 1.1- 981228 046 0.5- 0.2- 990303 118 (1.6+ 0.5-) 990508 704 0.4+ 0.6- 981228 046 0.4- 0.3- 990303 118 (1.8+ 0.3-) 990508 704 0.1- 0.5- 1999/ 990303 118 (1.7+ 0.3-) 990107 897 0.8- 0.1+ 990308 118 0.5+ 1.0- ( ) -------- Rejected Obs.

Associate of Central Bureau for Astronomical Telegrams Syuichi Nakano 2012 July 30

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