Nakano Note (Nakano wa Kangaeru noda) NK 2576 P/2012 X2 (PANSTARRS)
The following improved orbital elements, by S. Nakano, are from 131 observations 2012 Jan. 11 to 2013 Nov. 2. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.49 arc second. 2013 Nov. observations show the residuals of about 7" off from an orbit in NK 2453 (= HICQ 2013). See the previous orbits in NK 2407 and NK 2453. Epoch = 2013 Apr. 18.0 TT T = 2013 Mar. 31.28371 +/- 0.00205 (m.e.) TT Peri. = 215.62755 +/- 0.00026 Node = 271.02298 +/- 0.00005 (2000.0) Inc. = 34.12368 +/- 0.00007 q = 4.7481566 +/- 0.0000076 AU e = 0.7705847 +/- 0.0000100 a = 20.6967742 +/- 0.0000434 AU n' = 0.01046767 +/- 0.00000003 P = 94.157 +/- 0.0002957 years (+/- 0.11 day) The predicted orbit for the 2104 return is as follows: T = 2104 Oct. 26.01998 TT Epoch = 2104 Nov. 7.0 TT Peri. = 215.59307 e = 0.7665102 Node = 270.93942 (2000.0) a = 20.2679699 AU Inc. = 34.18132 n'= 0.01080162 q = 4.7323644 AU P = 91.246 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2012/ 121215 704 0.6+ 0.6- 130110 C32 0.2+ 0.4+ 120111 G96 0.4+ 0.8+ 121215 704 0.1- 0.4- 130110 C32 0.1+ 0.4+ 120111 G96 0.4- 0.9+ 121215 704 0.9+ 1.5+ 130112 C23 1.6+ 1.3+ 120111 G96 0.1- 0.4+ 121215 F65 0.3+ 0.1+ 130112 C23 1.4+ 1.1+ 120111 G96 0.1+ 0.2+ 121215 F65 0.0 0.2- 130112 C23 0.3+ 0.1+ 121212 F51 0.2- 0.0 121215 F65 0.4+ 0.4- 130113 D90 0.1+ 0.1+ 121212 F51 0.1- 0.2- 121215 F65 0.2+ 0.3- 130113 D90 0.1- 0.2+ 121212 F51 0.1- 0.1- 121215 J04 0.0 0.5+ 130113 D90 0.2- 0.1- 121212 F51 0.2- 0.2- 121215 J04 0.1+ 0.1+ 130131 D95 0.6+ 0.7+ 121213 807 0.1- 0.7- 121215 J04 0.0 0.1- 130131 D95 0.4+ 0.4- 121213 807 0.1- 0.1- 121215 204 0.6- 0.1- 130131 D95 0.7+ 0.1+ 121213 807 0.1+ 0.1- 121215 204 0.6+ 0.5+ 130202 I57 (0.1- 2.6+) 121213 807 0.2- 0.0 121215 204 0.2+ 0.6+ 130202 I57 0.8+ 1.0+ 121213 H06 0.2+ 0.6+ 121216 204 0.1+ 0.3+ 130202 I57 0.5- 1.5- 121213 H06 0.5+ 0.4+ 121216 204 0.3+ 0.2+ 130207 C32 0.2- 0.1+ 121213 H06 0.6+ 0.3+ 121216 204 0.5+ 0.1+ 130207 C32 0.2- 0.1+ 121213 H01 0.2- 0.1- 121219 B51 0.4- 0.3- 130210 I57 (0.6+ 4.9+) 121213 H01 0.2- 0.0 121219 B51 0.5- 0.1- 130210 I57 1.3+ 1.0+ 121213 H01 0.2- 0.1- 121220 349 0.0 0.5+ 130210 I57 1.3+ 0.5- 121213 H01 0.2- 0.1- 121220 349 0.1- 0.6+ 130210 349 0.3+ 1.4+ 121213 568 0.2- 0.2- 121231 900 0.1- 0.1+ 130210 349 0.2- 1.2+ 121213 568 0.2- 0.2- 121231 900 0.5+ 0.1- 130214 H45 1.6- 1.1+ 121213 568 0.1- 0.2- 2013/ 130214 H45 1.2- 0.9+ 121213 568 0.1- 0.1- 130101 D95 0.3- 0.5+ 130214 H45 0.6- 1.0+ 121213 568 0.2- 0.1- 130101 D95 0.3+ 0.3+ 130214 H45 0.7- 1.0+ 121214 807 0.5- 0.0 130101 D95 0.0 0.8- 130214 H45 0.4- 1.0+ 121214 807 0.2- 0.1- 130101 349 0.7+ 0.4+ 130216 511 0.3- 0.2+ 121214 807 0.2- 0.2- 130101 349 0.7+ 0.5+ 130216 511 0.4- 0.0 121214 807 0.0 0.3- 130102 D90 0.0 0.4+ 130314 900 0.3+ 0.7+ 121214 807 0.0 0.2- 130102 D90 0.1+ 0.4+ 130314 900 0.5+ 0.7+ 121214 W85 0.2- 0.2- 130102 D90 0.3+ 0.0 130331 511 0.7+ 0.8+ 121214 W85 0.2- 0.1- 130102 215 0.2+ 0.4- 130331 511 0.9+ 0.7+ 121214 W85 0.3- 0.2- 130102 215 1.8- 0.4- 130401 372 0.1+ 0.1- 121214 W85 0.0 0.1- 130102 215 (4.0- 0.3-) 130401 372 0.9+ 0.6+ 121214 W85 0.0 0.1- 130105 157 0.2- 0.1- 130401 372 0.3- 0.6- 121214 H21 0.1+ 0.1+ 130105 157 0.0 0.1+ 130422 Q62 0.4- 0.1- 121214 H21 0.1+ 0.0 130105 157 0.2- 0.1+ 130422 Q62 0.2- 0.0 121214 H21 0.0 0.3+ 130108 926 0.4+ 0.5+ 130422 Q62 0.2+ 0.2- 121214 J04 0.3+ 0.0 130108 926 0.2+ 0.7+ 131101 Q62 0.1+ 0.2- 121214 J04 0.0 0.1- 130108 926 0.1+ 0.3+ 131101 Q62 0.0 0.3- 121214 J04 0.0 0.1- 130109 E07 0.1- 0.1+ 131101 Q62 0.0 0.2- 121215 807 0.0 0.0 130109 E07 0.2+ 0.1- 131102 Q62 0.0 0.5- 121215 807 0.3- 0.1- 130110 C32 0.7- 0.0 131102 Q62 0.2+ 0.4- 121215 807 0.0 0.1- 130110 C32 1.3- 0.2+ 131102 Q62 0.2+ 0.4- 121215 807 0.3- 0.1- 130110 C32 0.0 0.5+ 121215 807 0.0 0.0 130110 C32 0.2- 0.7+ ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2013 Nov. 19