Nakano Note (Nakano wa Kangaeru noda) NK 3094 C/2015 WZ (PANSTARRS)

The following improved orbital elements, S. Nakano, are from 59 observations 2015 Oct. 25 to 2016 Apr. 24. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.32 arc second. Hidetaka Sato, Tokyo, gives mag. = 13.3 on 2016 Apr. 24 UT as total CCD magnitude. Then the comet has coma diameter = 1'.3 with strong condensation. The comet will pass 0.97 AU from Jupiter on 2017 Aug. 22 UT. Epoch = 2016 Apr. 2.0 TT T = 2016 Apr. 15.79917 +/- 0.00044 (m.e.) TT Peri. = 66.71046 +/- 0.00055 Node = 40.04559 +/- 0.00004 (2000.0) Inc. = 134.13475 +/- 0.00008 q = 1.3766379 +/- 0.0000088 AU e = 0.9929081 +/- 0.0000069 1/a = +0.0051516 +/- 0.0000050 1/AU a = 194.1 AU P = 2705 years origin = +0.005857 (Q= 7) future = +0.006698 The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2015/ 151118 K92 0.4+ 0.1- 151205 F51 0.1- 0.1+ 151025 F51 0.0 0.2- 151118 K92 0.1+ 0.1- 151205 F51 0.0 0.0 151025 F51 0.2+ 0.1- 151119 711 0.7- 0.4- 151208 568 0.1+ 0.2- 151107 F51 0.1- 0.1+ 151119 711 0.3- 0.6- 151208 568 0.2+ 0.1- 151108 F51 0.0 0.1+ 151119 H01 0.0 0.0 151208 568 0.1+ 0.2- 151108 F51 0.1+ 0.0 151119 H01 0.0 0.2- 151208 568 0.2+ 0.1- 151115 F51 0.4+ 0.1+ 151119 291 0.4- 0.6+ 151208 568 0.1+ 0.2- 151115 F51 0.2+ 0.4+ 151119 291 0.1- 0.2+ 151224 F51 0.1- 0.1- 151115 F51 0.3- 0.1- 151119 291 0.2- 0.3+ 151224 F51 0.0 0.0 151115 F51 0.0 0.0 151119 H01 0.0 0.1- 151224 F51 0.0 0.2+ 151117 F51 0.0 0.1+ 151119 H01 0.0 0.2- 2016/ 151117 F51 0.1- 0.1+ 151129 695 0.4- 1.0+ 160102 D29 0.2+ 0.5- 151117 F51 0.2- 0.2+ 151129 695 0.4- 0.6+ 160102 D29 0.2+ 0.3+ 151118 Y28 0.1+ 0.1+ 151129 695 0.4- 0.7+ 160417 L51 0.6- 0.3+ 151118 Y28 0.1+ 0.1+ 151202 G45 0.1+ 0.2- 160417 L51 0.8- 0.4+ 151118 291 0.0 0.2+ 151202 G45 0.4+ 0.0 160417 L51 0.4- 0.3- 151118 291 0.2- 0.2+ 151202 G45 0.0 0.1- 160424 H06 0.7+ 0.0 151118 291 0.0 0.3+ 151202 G45 0.7+ 0.1+ 160424 H06 0.6+ 0.1+ 151118 711 0.4+ 0.7- 151202 G45 0.6+ 0.3+ 160424 H06 0.1+ 0.1- 151118 711 0.8- 1.1- 151205 F51 0.3- 0.1+ 151118 K92 0.2+ 0.4- 151205 F51 0.1- 0.0 ( ) -------- Rejected Obs. 2016/ R. A. (2000) Decl. Delta r Daily motion Elong. Phase Mag. Astro-twilight 27h JST h m o , AU AU , o o o m1 ho A o Apr. 25 23 21.03 +28 18.2 1.944 1.384 26.8/330 42.7 29.5 12.9 +23.3 250.9 26 23 20.01 +28 41.4 1.927 1.386 27.4/329 43.7 30.1 12.8 +24.1 250.9 27 23 18.94 +29 05.0 1.910 1.388 28.1/329 44.6 30.7 12.8 +25.0 251.0 28 23 17.84 +29 29.0 1.893 1.390 28.7/328 45.6 31.2 12.8 +25.9 251.0 29 23 16.68 +29 53.5 1.876 1.392 29.4/328 46.6 31.7 12.8 +26.7 251.0 30 23 15.48 +30 18.4 1.858 1.394 30.1/327 47.6 32.3 12.8 +27.6 251.0 May 1 23 14.22 +30 43.8 1.840 1.396 30.9/327 48.6 32.8 12.8 +28.6 251.0 2 23 12.90 +31 09.6 1.823 1.399 31.7/326 49.6 33.3 12.8 +29.5 250.9 3 23 11.53 +31 36.0 1.805 1.401 32.5/326 50.6 33.8 12.7 +30.4 250.9 4 23 10.10 +32 02.8 1.786 1.404 33.3/325 51.6 34.3 12.7 +31.4 250.8 5 23 08.59 +32 30.2 1.768 1.407 34.2/325 52.7 34.8 12.7 +32.4 250.8 6 23 07.02 +32 58.1 1.750 1.410 35.1/324 53.7 35.2 12.7 +33.4 250.7 7 23 05.38 +33 26.5 1.731 1.413 36.1/323 54.7 35.7 12.7 +34.4 250.6 8 23 03.65 +33 55.5 1.712 1.417 37.1/323 55.8 36.1 12.7 +35.4 250.5 9 23 01.84 +34 25.0 1.694 1.420 38.1/322 56.8 36.5 12.7 +36.4 250.3 10 22 59.94 +34 55.1 1.675 1.424 39.2/322 57.9 36.9 12.7 +37.5 250.2 11 22 57.95 +35 25.7 1.656 1.428 40.3/321 59.0 37.3 12.6 +38.6 250.0 12 22 55.86 +35 56.9 1.637 1.431 41.5/320 60.1 37.7 12.6 +39.7 249.8 13 22 53.66 +36 28.7 1.618 1.435 42.7/320 61.1 38.1 12.6 +40.8 249.6 14 22 51.35 +37 01.1 1.599 1.440 43.9/319 62.2 38.4 12.6 +41.9 249.3 15 22 48.91 +37 34.0 1.580 1.444 45.2/318 63.3 38.7 12.6 +43.1 249.0 16 22 46.35 +38 07.5 1.561 1.448 46.5/317 64.5 39.0 12.6 +44.2 248.7 17 22 43.66 +38 41.6 1.542 1.453 47.9/316 65.6 39.3 12.6 +45.4 248.3 18 22 40.81 +39 16.2 1.523 1.458 49.4/316 66.7 39.6 12.6 +46.6 247.8 19 22 37.82 +39 51.4 1.504 1.462 50.9/315 67.8 39.9 12.5 +47.9 247.4 20 22 34.66 +40 27.1 1.486 1.467 52.4/314 69.0 40.1 12.5 +49.1 246.8 21 22 31.32 +41 03.2 1.467 1.472 54.0/313 70.1 40.3 12.5 +50.4 246.2 22 22 27.80 +41 39.9 1.449 1.477 55.6/312 71.3 40.5 12.5 +51.7 245.5 23 22 24.08 +42 16.9 1.431 1.483 57.3/311 72.4 40.6 12.5 +53.0 244.7 24 22 20.14 +42 54.3 1.413 1.488 59.1/310 73.6 40.8 12.5 +54.3 243.9 25 22 15.98 +43 32.1 1.395 1.494 60.9/309 74.8 40.9 12.5 +55.7 242.9 26 22 11.59 +44 10.0 1.377 1.499 62.7/308 76.0 41.0 12.5 +57.0 241.8 27 22 06.93 +44 48.2 1.360 1.505 64.6/307 77.2 41.0 12.4 +58.4 240.5 28 22 02.01 +45 26.4 1.343 1.511 66.5/305 78.4 41.1 12.4 +59.8 239.1 29 21 56.80 +46 04.5 1.327 1.517 68.5/304 79.6 41.1 12.4 +61.2 237.4 30 21 51.29 +46 42.5 1.310 1.523 70.5/303 80.8 41.1 12.4 +62.5 235.5 31 21 45.46 +47 20.2 1.294 1.529 72.6/301 82.0 41.1 12.4 +63.9 233.3 June 1 21 39.30 +47 57.4 1.279 1.535 74.6/300 83.2 41.0 12.4 +65.2 230.9 2 21 32.78 +48 33.9 1.264 1.541 76.7/298 84.4 40.9 12.4 +66.5 228.0 3 21 25.90 +49 09.5 1.250 1.548 78.8/297 85.6 40.8 12.4 +67.8 224.7 4 21 18.64 +49 44.0 1.236 1.554 80.9/295 86.8 40.7 12.4 +69.0 220.9 5 21 10.99 +50 17.2 1.222 1.561 82.9/293 88.0 40.5 12.4 +70.0 216.5 m1 = 10.0 + 5 log + 10.0 log

Associate of the CBAT Syuichi Nakano 2016 Apr. 28

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