Nakano Note (Nakano wa Kangaeru noda) NK 3607 P/2018 C1 (Lemmon-Read)

The following improved orbital elements, by S. Nakano, are from 114 observations 2018 Jan. 16 to May 25. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.43 arc second. Epoch = 2018 Feb. 11.0 TT T = 2018 Feb. 25.54267 +/- 0.01026 (m.e.) TT Peri. = 234.32167 +/- 0.00329 Node = 270.45006 +/- 0.00053 (2000.0) Inc. = 5.13352 +/- 0.00004 q = 2.5957379 +/- 0.0000097 AU e = 0.5344389 +/- 0.0000062 a = 5.5755038 +/- 0.0000771 AU n' = 0.07486484 +/- 0.00000155 P = 13.165 +/- 0.0002729 years (+/- 0.10 day) The predicted orbit for the 2031 return is as follows: T = 2031 Aug. 2.15610 TT Epoch = 2031 Aug. 2.0 TT Peri. = 236.27576 e = 0.5313228 Node = 269.80090 (2000.0) a = 5.6373107 AU Inc. = 5.10092 n'= 0.07363701 q = 2.6420792 AU P = 13.385 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2018/ 180210 595 0.0 0.4- 180307 A77 0.2+ 0.4- 180116 F51 0.1+ 0.0 180210 595 0.1+ 0.4- 180307 A77 0.4+ 0.3+ 180116 F51 0.1+ 0.1- 180210 203 0.7- 0.2+ 180307 A77 0.9+ 0.1- 180116 F51 0.1+ 0.1- 180210 595 0.0 0.1+ 180308 B74 0.3- 0.1+ 180204 G96 0.3+ 0.0 180210 K38 0.4- 0.1- 180308 B74 0.1- 0.2- 180204 G96 0.1- 0.2- 180210 A77 0.8- 0.3+ 180308 B74 1.2- 0.2- 180204 G96 0.2+ 0.0 180211 A77 0.4- 0.4+ 180309 691 0.2+ 0.2+ 180204 G96 0.0 0.1+ 180211 A77 0.2- 0.6+ 180309 691 0.3+ 0.2+ 180207 I41 0.1- 0.3+ 180211 K38 0.4- 0.1+ 180309 691 0.2+ 0.5+ 180207 I41 0.3- 0.5- 180211 K38 0.1- 0.0 180312 Q11 0.8+ 0.4- 180207 I41 0.1- 0.2- 180211 L06 0.7+ 0.2- 180312 Q11 0.8+ 0.8- 180209 703 0.5+ 0.2+ 180211 L06 0.7+ 0.2+ 180312 Q11 0.7+ 0.9- 180209 691 1.4- 0.2+ 180212 Q11 0.1+ 0.2+ 180312 B74 0.1+ 0.1- 180209 703 0.1- 0.1+ 180212 Q11 0.2+ 0.2+ 180312 B74 0.1+ 0.3- 180209 703 0.6- 0.6+ 180212 Q11 0.0 0.3+ 180312 B74 0.2+ 0.2- 180209 I41 0.1+ 0.1- 180213 215 0.3- 0.3- 180317 Q11 0.0 0.2+ 180209 703 0.3- 0.7+ 180213 215 0.0 0.1- 180317 Q11 0.3+ 0.3- 180209 691 0.6- 0.5+ 180213 215 0.0 0.1+ 180317 349 0.6- 1.1- 180209 691 0.4- 0.3+ 180214 W88 0.3- 0.2+ 180317 349 0.3+ 0.2+ 180209 I41 0.2+ 0.1- 180214 W88 0.6+ 0.5- 180319 A77 0.9+ 0.5- 180209 I41 0.0 0.4- 180217 349 0.0 1.0- 180319 A77 0.7+ 0.3+ 180209 I41 0.2+ 0.2- 180217 349 0.5+ 0.2- 180321 A71 0.2+ 0.1+ 180209 I41 0.3+ 0.0 180217 C10 1.0- 0.4+ 180321 A71 0.0 0.1+ 180210 I52 0.7- 0.1- 180217 C10 0.4- 0.0 180412 G96 0.3- 0.0 180210 I52 0.3- 0.3+ 180217 C10 0.3- 0.9- 180412 G96 0.0 0.4+ 180210 I52 0.0 0.1+ 180218 K77 (8.9- 0.1-) 180412 G96 0.5+ 0.6- 180210 H06 0.5+ 0.7+ 180218 K77 (8.9- 0.2-) 180412 G96 0.6+ 0.3- 180210 H06 0.7+ 0.8+ 180219 D95 0.9- 0.1- 180418 Q11 1.3- 0.3+ 180210 H06 0.9+ 0.5+ 180219 D95 1.1+ 0.6+ 180418 Q11 1.4- 0.0 180210 291 1.0- 1.0+ 180221 Q11 0.0 0.5+ 180420 G96 1.0- 0.5+ 180210 291 0.4- 0.8+ 180221 Q11 0.0 0.3+ 180420 G96 0.2- 0.3- 180210 291 0.1+ 0.7+ 180222 D29 0.1+ 0.2- 180420 G96 0.7- 0.9+ 180210 291 0.2+ 0.1+ 180222 D29 0.1- 0.1+ 180420 G96 0.9+ 0.4+ 180210 291 0.1+ 0.2+ 180222 D29 0.2- 0.5+ 180509 691 0.1- 0.3+ 180210 291 0.1+ 0.1+ 180223 E85 0.1- 0.4- 180509 691 0.0 0.1+ 180210 C77 0.2+ 0.1+ 180223 E85 0.1- 0.6- 180509 691 0.1- 0.2- 180210 C77 0.1- 0.2- 180223 E85 0.2- 0.4- 180525 691 0.5+ 0.4- 180210 C77 0.0 0.1+ 180223 J01 0.1- 0.6- 180525 691 0.2+ 0.0 180210 203 0.1+ 0.3+ 180223 J01 0.5- 0.8- 180525 691 0.6+ 0.3+ ( ) -------- Rejected Obs.

Associate of the CBAT Syuichi Nakano 2018 June 11

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