September 16, 2002 Comet P/1986 A1 = 2002 R2 ( Shoemaker 3 ) The following improved orbital elements by Kenji Muraoka, are from 74 observations 1986 Jan. 10 to 2002 Sept. 12, perturbations by 9 Plantes, Moon and 5 minor planets were taken into account. The mean residual is +/- 0.78 arc seconds. Epoch = 2003 Jan. 1.0 TT JDT = 2452640.5 T = 2002 Dec. 14.88321 +/- 0.00246 (m.e.) TT Peri. = 14.92936 +/- 0.00175 Node = 97.27276 +/- 0.00034 (2000.0) Incl. = 6.38642 +/- 0.00006 q = 1.8136057 +/- 0.0000216 AU e = 0.7268083 +/- 0.0000032 a = 6.6385828 +/- 0.0000168 AU nK = 0.05762236 +/- 0.00000022 P = 17.105 +/- 0.0000649 years T = 1985 Dec. 18.56362 TT Epoch = 1985 Dec. 1.0 TT Peri. = 14.86621 e = 0.7277135 Node = 97.27833 (2000.0) a = 6.5883268 AU Incl. = 6.40714 nK = 0.058282929 q = 1.7939121 AU P = 16.911 years Residuals in seconds of arc 860110 675 (2.8- 2.9+) 860120 675 0.5+ 0.4+ 860207 391 (1.4- 2.7+) 860110 675 (0.3- 2.8+) 860120 707 0.5+ 1.4+ 860207 391 (0.6+ 4.6+) 860112 688 0.7+ 0.0 860120 675 0.2+ 0.3+ 860209 801 1.8+ 1.1+ 860112 688 1.2+ 0.1+ 860120 675 0.1+ 0.3+ 860209 391 0.6- 1.6- 860117 801 (2.2- 3.3+) 860121 809 0.6- 1.2- 860210 391 1.1- 0.5+ 860117 688 (4.1+ 0.5+) 860121 809 0.6- 0.0 860211 491 0.7+ 0.3- 860117 688 1.5+ 1.8- 860121 323 0.7+ 0.3- 860211 691 0.7+ 0.4+ 860117 391 0.3+ 0.5+ 860121 391 1.4- 0.5- 860211 691 0.4+ 0.7+ 860117 391 1.0+ 0.1+ 860121 391 0.9- 0.9- 860211 491 0.0 1.0+ 860117 893 (4.7+ 2.2+) 860121 391 0.2- 0.1+ 860212 391 0.2- 1.6- 860117 391 1.7+ 0.1+ 860122 809 0.0 1.0- 860306 707 0.0 0.3+ 860117 323 (2.1+ 0.9-) 860201 792 0.9- 1.9+ 860312 801 (5.2- 2.8-) 860117 893 2.0- 0.7- 860201 792 1.1- 0.2+ 860316 691 (3.1+ 0.9-) 860117 391 1.8- 0.2+ 860201 391 1.7+ 0.8- 860404 801 0.4- 0.5+ 860118 046 0.4- 0.3+ 860201 391 0.4+ 0.1- 860414 801 (3.0+ 1.3-) 860118 046 0.7- 0.9+ 860202 675 0.3- 0.6+ 860415 691 0.1- 0.7+ 860118 809 0.8- 0.1+ 860202 675 0.3- 0.6+ 860415 691 0.1- 0.6+ 860118 675 0.1- 0.4+ 860202 391 0.6- 1.0- 860415 691 0.3- 0.8+ 860118 675 0.0 0.5+ 860202 063 (2.5- 0.2+) 860513 691 0.5+ 0.4- 860118 893 1.0- 1.0+ 860203 063 0.6+ 0.2+ 860513 691 (3.4+ 1.0-) 860118 893 (2.8- 1.6+) 860204 801 0.5+ 1.3+ 860513 691 1.0+ 0.5- 860118 893 0.2- 0.3- 860204 391 (2.7+ 3.0-) 860514 691 1.7- 1.0- 860119 809 0.6- 0.8- 860204 391 (2.8+ 1.3+) 860514 691 0.3- 0.6- 860119 809 0.9- 0.6- 860204 391 0.6+ 0.4- 860514 691 (0.1- 2.8-) 860119 372 0.1+ 0.1- 860204 056 (3.0+ 2.1-) 020909 867 0.3- 0.2+ 860119 372 (2.0+ 3.1+) 860204 056 0.3+ 1.7- 020909 867 0.6- 0.0 860120 809 0.5- 1.2- 860204 978 (4.7- 3.8-) 020909 867 0.3- 0.3- 860120 809 0.3- 0.1+ 860205 675 1.8+ 0.1+ 020909 867 0.2- 0.4- 860120 675 0.1+ 0.3+ 860205 391 0.7+ 1.7- 020912 360 0.5+ 0.1- 860120 675 0.1+ 0.5+ 860205 391 1.0- 0.4- 020912 360 0.5+ 0.0 860120 657 0.2+ 0.9+ 860205 056 0.4+ 0.8+ 020912 360 0.3+ 0.4+ 860120 675 0.6+ 0.4+ 860207 675 (2.9- 0.4+) September 15, 2002 Comet P/2002 R2 = P/1986 A1 ( Shoemaker 3 ) The following improved orbital elements by Kenji Muraoka, are from 73 observations 1986 Jan. 12 to 2002 Sept. 12, perturbations by 9 Plantes, Moon and 5 minor planets were taken into account. The mean residual is +/- 0.79 arc seconds. Epoch = 2003 Jan. 1.0 TT JDT = 2452640.5 T = 2002 Dec. 14.88300 +/- 0.00248 (m.e.) TT Peri. = 14.92929 +/- 0.00176 Node = 97.27273 +/- 0.00034 (2000.0) Incl. = 6.38642 +/- 0.00006 q = 1.8136057 +/- 0.0000217 AU e = 0.7268083 +/- 0.0000033 a = 6.6385828 +/- 0.0000169 AU nK = 0.05762236 +/- 0.00000022 P = 17.105 +/- 0.0000655 years T = 1985 Dec. 18.56340 TT Epoch = 1985 Dec. 1.0 TT Peri. = 14.86615 e = 0.7277135 Node = 97.27829 (2000.0) a = 6.5883269 AU Incl. = 6.40714 nK = 0.058282928 q = 1.7939123 AU P = 16.911 years --