Nakano Note (Nakano wa Kangaeru noda) NK 2479 C/2012 Y1 (LINEAR)

The following improved orbital elements, by S. Nakano, are from 135 observations 2012 Dec. 18 to 2013 Mar. 12. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.62 arc second. The past return would be 1802 Apr., if this is correct, the comet has passed 1.82 AU from Jupiter on 1804 Feb.. Epoch = 2013 Jan. 28.0 TT T = 2013 Jan. 18.20096 +/- 0.00651 (m.e.) TT Peri. = 268.83439 +/- 0.00432 Node = 193.24315 +/- 0.00148 (2000.0) Inc. = 20.95963 +/- 0.00023 q = 2.0162268 +/- 0.0000282 AU e = 0.9468816 +/- 0.0000519 1/a = +0.0263455 +/- 0.0000257 1/AU a = 37.96 AU P = 233.9 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2012/ 2013/ 130126 958 0.0 1.0+ 121218 704 1.1+ 0.1- 130101 D90 0.0 0.2- 130126 958 1.7- 0.9+ 121218 704 0.2- 0.6+ 130101 D90 0.0 0.3- 130127 J24 0.7- 0.0 121218 704 0.2+ 0.6+ 130101 D90 0.1+ 0.2- 130127 J24 0.4- 0.2+ 121218 704 0.3+ 0.5- 130101 349 0.5- 0.3- 130127 J24 0.5+ 1.8+ 121218 704 0.6- 0.1- 130101 Q62 0.3+ 0.0 130128 D90 0.1- 0.3- 121219 204 0.0 0.0 130101 Q62 0.3+ 0.2- 130128 D90 0.5- 0.4- 121219 204 0.0 0.3- 130101 Q62 0.0 0.8- 130128 D90 0.7- 0.2+ 121219 204 0.3+ 0.3- 130101 349 0.3+ 0.9+ 130128 D90 1.6- 0.9- 121220 704 0.0 0.2+ 130102 D90 0.1- 0.1- 130128 958 0.2+ 0.8- 121220 448 0.2- 1.2- 130102 D90 0.1- 0.1- 130128 958 1.5+ 0.7- 121220 704 0.1- 0.0 130102 D90 0.3- 0.1- 130202 900 1.4- 1.0- 121220 704 0.3- 0.4- 130102 215 0.4- 0.1- 130202 900 1.2+ 1.6+ 121220 704 0.5+ 0.4- 130102 215 1.8- 1.1+ 130202 958 0.4+ 1.2+ 121220 448 0.1- 0.6+ 130102 215 1.4- 1.3+ 130202 958 0.2+ 0.3+ 121220 448 0.5- 0.1+ 130104 E07 0.0 0.1- 130202 958 1.7+ 0.8- 121220 448 0.1+ 1.0+ 130104 E07 0.1- 0.2- 130204 D90 0.1- 0.1- 121220 704 0.1- 1.6- 130106 349 0.3+ 0.7+ 130204 D90 0.3- 0.5- 121220 H06 0.2+ 0.2- 130106 349 0.3- 1.2+ 130204 D90 0.2- 0.2- 121220 H06 0.1+ 0.2+ 130109 E07 0.1- 0.2- 130209 E85 1.8- 0.4+ 121221 I39 1.9- 1.1- 130109 E07 0.2- 0.4- 130209 E85 0.2+ 0.0 121221 I39 1.1- 0.7+ 130110 E07 0.2- 0.2- 130209 E85 0.7- 0.4- 121221 I39 0.2+ 0.3- 130110 E07 0.0 0.2- 130209 E85 0.3- 0.8- 121221 H01 0.2+ 0.1- 130111 B96 (0.6- 2.3-) 130211 H45 0.0 0.2- 121221 H01 0.2+ 0.1- 130111 B96 0.0 0.5- 130211 H45 0.1+ 0.9- 121221 H01 0.2+ 0.2- 130111 B96 0.8+ 0.5+ 130211 H45 0.3+ 0.1+ 121221 H01 0.2+ 0.2- 130113 D90 0.1- 0.3- 130211 H45 0.2- 0.6- 121221 H06 0.0 1.6- 130113 D90 0.1- 0.1- 130211 H45 0.3- 0.1- 121221 H06 (0.0 3.7-) 130113 D90 0.0 0.3- 130211 H45 0.1+ 0.1+ 121221 E10 0.2+ 0.0 130115 E07 0.0 0.2- 130301 958 0.5+ 1.5- 121221 E10 0.1- 0.3- 130115 E07 0.0 0.1- 130301 958 1.2+ 0.2+ 121221 E10 0.1- 0.4- 130116 D00 0.1- 0.0 130301 958 0.5- 0.4- 121221 104 0.1- 0.4- 130116 D00 0.9+ 0.0 130303 511 0.5+ 0.5- 121221 104 0.0 0.2- 130116 D00 0.2- 0.4+ 130303 511 0.0 0.0 121221 I89 1.1+ 0.2+ 130116 D00 1.1- 0.7+ 130304 130 0.6+ 0.0 121221 104 0.2+ 0.1- 130119 H45 0.4+ 1.0+ 130304 130 0.1+ 0.6- 121221 I89 1.4+ 1.0+ 130119 H45 0.7+ 0.4+ 130304 130 0.2- 0.5- 121221 I89 1.0+ 1.3+ 130119 H45 0.6+ 0.2+ 130304 511 0.0 0.7- 121222 807 0.4+ 0.3- 130119 H45 0.3+ 0.3- 130304 511 0.9- 1.1+ 121222 807 0.5+ 0.1- 130119 H45 0.3+ 0.1+ 130305 A32 0.2+ 0.4+ 121222 807 0.6+ 0.4- 130121 D90 0.0 0.2+ 130305 A32 0.2+ 0.6+ 121222 807 0.5+ 0.2- 130121 D90 0.4- 0.7- 130305 A32 0.2+ 0.5+ 121223 349 0.6- 0.8+ 130121 D90 0.4- 0.5- 130305 A32 0.4+ 0.3+ 121223 349 0.7- 1.1+ 130124 958 0.4- 0.1+ 130312 E07 0.2+ 0.2- 121231 D90 0.2+ 0.3- 130124 958 0.9+ 1.7+ 130312 E07 0.1+ 0.1- 121231 D90 0.1+ 0.2- 130124 958 0.4+ 0.6+ 121231 D90 0.1+ 0.0 130126 958 0.8+ 1.0+ ( ) -------- Rejected Obs.

Associate of Central Bureau for Astronomical Telegrams Syuichi Nakano 2013 Apr. 6

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