Nakano Note (Nakano wa Kangaeru noda) NK 3009 321P/SOHO (2001 D1 = 1997 J6 = 2004 X7 = 2008 S2 = 2012 M2)
The following improved orbital elements, by S. Nakano, are from 83 observations 1997 to 2012. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/-11.68 arc seconds. See the previous orbit in NK 1769. Epoch = 2012 July 12.0 TT T = 2012 June 30.48619 +/- 0.00027 (m.e.) TT Peri. = 172.58601 +/- 0.04508 Node = 165.10116 +/- 0.03674 (2000.0) Inc. = 19.66846 +/- 0.01284 q = 0.0471139 +/- 0.0000109 AU e = 0.9805893 +/- 0.0000045 a = 2.4272110 +/- 0.0003274 AU n' = 0.26064103 +/- 0.00005274 P = 3.781 +/- 0.0007651 years (+/- 0.28 day) T = 1997 May 1.66686 TT Epoch = 1997 Apr. 22.0 TT Peri. = 172.21017 e = 0.9796624 Node = 165.42682 (2000.0) a = 2.4351850 AU Inc. = 18.70147 n'= 0.25936187 q = 0.0495257 AU P = 3.800 years T = 2001 Feb. 18.76973 TT Epoch = 2001 Feb. 20.0 TT Peri. = 172.20490 e = 0.9795016 Node = 165.42722 (2000.0) a = 2.4363594 AU Inc. = 18.64894 n'= 0.25917437 q = 0.0499415 AU P = 3.803 years T = 2004 Dec. 7.82718 TT Epoch = 2004 Dec. 21.0 TT Peri. = 172.55372 e = 0.9806133 Node = 165.12595 (2000.0) a = 2.4267050 AU Inc. = 19.62171 n'= 0.26072255 q = 0.0470459 AU P = 3.780 years T = 2008 Sept.17.95566 TT Epoch = 2008 Sept.11.0 TT Peri. = 172.58202 e = 0.9807102 Node = 165.11333 (2000.0) a = 2.4261848 AU Inc. = 19.69334 n'= 0.26080640 q = 0.0468006 AU P = 3.779 years The predicted orbit for the 2016 return is as follows: T = 2016 Apr. 10.39033 TT Epoch = 2016 Apr. 2.0 TT Peri. = 172.71742 e = 0.9811395 Node = 165.02411 (2000.0) a = 2.4223236 AU Inc. = 20.05579 n'= 0.26143025 q = 0.0456861 AU P = 3.770 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1997/ 010218 249 1.2- 3.2- Y 080917 249(31.5+ 50.6+)Y 970501 249 71.2+ 2.5+ Y 010218 249 10.8- 0.4+ Y 080917 249(35.5+ 13.4+)Y 970501 249 70.7+ 4.4- Y 010218 249 2.7- 2.3+ Y 080917 249(35.6+ 19.6+)Y 970501 249 61.2+ 2.3- Y 010218 249 6.2+ 3.9- Y 080917 249 13.7+ 15.0+ Y 2001/ 010218 249 23.4- 1.0- Y 080917 249 6.2+ 23.4+ Y 010218 249(12.9- 51.1+)Y 010218 249 3.4- 10.0- Y 080917 249(35.4+ 31.9+)Y 010218 249 4.1+ 20.0+ Y 010218 249 0.9+ 11.1- Y 080918 249 28.8- 4.7+ Y 010218 249 (4.8+ 37.7+)Y 010218 249 0.8- 4.9+ Y 080918 249 7.0- 7.4- Y 010218 249 1.8- 3.3- Y 010218 249 9.6- 8.0+ Y 080918 249 5.9- 1.5- Y 010218 249 2.9- 0.4+ Y 010218 249 7.5+ 10.9- Y 080918 249 14.6- 2.3+ Y 010218 249 3.0- 7.3+ Y 010218 249 19.5- 4.5- Y 080918 249 14.9- 18.5- Y 010218 249 10.4- 14.2+ Y 010218 249 10.1+ 1.8+ Y 080918 249 4.8- 14.1- Y 010218 249 7.7- 25.1+ Y 010219 249 9.2- 7.8- Y 080918 249 3.7- 6.8- Y 010218 249 12.7- 14.0+ Y 2004/ 080918 249 17.1- 2.7- Y 010218 249 0.0 33.9+ Y 041207 249(69.0- 33.4-)Y 2012/ 010218 249 8.8- 21.8+ Y 041207 249 2.5+ 12.9+ Y 120630 249 1.5- 9.8+ Y 010218 249 11.0- 19.8+ Y 041207 249 20.6- 2.8- Y 120630 249 3.5- 9.3+ Y 010218 249 0.3+ 26.8+ Y 041207 249 6.9+ 1.6- Y 120630 249 4.9- 6.2+ Y 010218 249 (2.4- 37.8+)Y 041207 249 0.1- 0.1+ Y 120630 249 2.6+ 6.4+ Y 010218 249 12.4- 23.7+ Y 041207 249 13.8+ 10.4+ Y 120630 249 3.0- 1.1+ Y 010218 249 10.6- 22.8+ Y 041207 249 8.4+ 9.8+ Y 120630 249 2.4- 2.2+ Y 010218 249 24.2- 13.8+ Y 041207 249 13.8+ 2.6+ Y 120630 249 7.1- 4.6+ Y 010218 249 19.9- 23.9+ Y 041207 249 3.9- 3.4+ Y 120630 249 1.2+ 8.5+ Y 010218 249 3.1- 28.9+ Y 041207 249 10.0+ 1.8- Y 120630 249 0.9- 8.8+ Y 010218 249 8.2- 21.0+ Y 041207 249 7.2+ 10.6+ Y 120630 249 4.0- 1.6- Y 010218 249 3.6+ 23.1+ Y 041207 249 16.9+ 5.5- Y 120630 249 2.5- 2.5+ Y 010218 249 14.7- 19.2+ Y 041207 249 7.9- 2.0- Y 120630 249 0.6+ 4.9+ Y 010218 249(26.0+ 94.6-)Y 041207 249 10.2+ 9.4- Y 120630 249 4.1- 0.6+ Y 010218 249 10.8- 16.4+ Y 041207 249 0.5+ 1.7+ Y 120630 249 5.7- 2.2- Y 010218 249 10.0- 17.5+ Y 041207 249 3.7+ 3.2- Y 120630 249 1.6- 4.3+ Y 010218 249 12.2- 19.8+ Y 2008/ 120630 249 2.7+ 0.9- Y 010218 249 9.7- 4.7- Y 080917 249 30.3+ 13.5+ Y 010218 249 14.9- 9.1- Y 080917 249 1.1+ 19.4+ Y ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2015 Oct. 31