123P/West-Hartley 
   From 2151 observations 1989 Mar. 14-2017 Sept. 27.(5) Kinoshita
   Epoch = 2018 Dec. 28.0 TT = JDT 2458480.5 
       T = 2019 Feb. 5.10532 TT             peri.= 103.00721 
       e = 0.4486760                        node =  46.49954 (2000.0) 
       q = 2.1268827 AU                     incl.=  15.35958 
   a = 3.8577729 AU          n = 0.13007657         P = 7.58 years 
  m1 = 7.0 + 5log(delta) + 20.0log(r) 
  A. Node = E:11/09.6 JST  O:2018/01/11.7 JST  3.427 AU 
  D. Node = E:05/08.0 JST  O:2019/10/09.0 JST  2.799 AU 

18/19  JST     R.A. (2000) D.C.    Delta     r    Elong. Phase   dMo./P.A.   Tail/P.A. M-O Ag   m1     H/A
12/08 02:40   10 54.55  +27 19.0   1.771   2.178  100.5   26.4   20.2/ 90.4   1.4/290  104  0  15.0  +50/268
12/09 02:40   10 56.06  +27 18.8   1.759   2.176  101.2   26.4   20.0/ 90.0   1.4/290  116  1  15.0  +50/268
12/10 02:40   10 57.56  +27 18.8   1.747   2.174  101.8   26.3   19.7/ 89.7   1.4/290  127  2  15.0  +51/268
12/11 02:40   10 59.04  +27 18.9   1.736   2.173  102.4   26.3   19.5/ 89.3   1.4/290  138  3  14.9  +51/269
12/12 02:40   11 00.50  +27 19.1   1.725   2.171  103.1   26.2   19.2/ 88.9   1.4/289  148  4  14.9  +52/269
12/13 02:40   11 01.94  +27 19.4   1.713   2.170  103.8   26.2   19.0/ 88.6   1.4/289  157  5  14.9  +52/269
12/14 02:40   11 03.37  +27 19.8   1.702   2.168  104.4   26.1   18.7/ 88.1   1.4/289  163  6  14.9  +53/270
12/15 02:40   11 04.77  +27 20.4   1.691   2.166  105.1   26.0   18.4/ 87.7   1.4/289  162  7  14.9  +53/270
12/16 02:30   11 06.14  +27 21.1   1.680   2.165  105.7   25.9   18.2/ 87.3   1.4/288  156  8  14.8  +52/269
12/17 02:30   11 07.50  +27 22.0   1.669   2.164  106.4   25.9   17.9/ 86.8   1.4/288  146  8  14.8  +52/269
12/18 02:30   11 08.85  +27 22.9   1.658   2.162  107.1   25.8   17.6/ 86.3   1.4/288  135  9  14.8  +53/270
12/19 02:30   11 10.17  +27 24.0   1.647   2.161  107.8   25.7   17.3/ 85.8   1.4/288  123 10  14.8  +53/270
12/20 02:30   11 11.47  +27 25.3   1.636   2.159  108.4   25.6   17.1/ 85.3   1.4/287  110 11  14.8  +54/270
12/21 02:30   11 12.74  +27 26.6   1.625   2.158  109.1   25.5   16.8/ 84.7   1.4/287   98 12  14.7  +54/271
12/22 02:30   11 14.00  +27 28.2   1.615   2.157  109.8   25.4   16.5/ 84.2   1.4/287   84 14  14.7  +55/271
12/23 02:30   11 15.23  +27 29.8   1.604   2.155  110.5   25.3   16.2/ 83.6   1.4/287   70 15  14.7  +55/271
12/24 02:30   11 16.44  +27 31.6   1.594   2.154  111.2   25.2   15.9/ 82.9   1.4/286   57 16  14.7  +56/272
12/25 02:20   11 17.62  +27 33.5   1.584   2.153  111.9   25.1   15.6/ 82.3   1.5/286   43 17  14.7  +54/271
12/26 02:20   11 18.78  +27 35.6   1.573   2.152  112.6   25.0   15.3/ 81.6   1.5/286   31 18  14.6  +55/271
12/27 02:20   11 19.92  +27 37.8   1.563   2.151  113.3   24.8   15.0/ 80.9   1.5/285   21 19  14.6  +56/271
12/28 02:20   11 21.03  +27 40.2   1.553   2.149  114.0   24.7   14.6/ 80.1   1.5/285   18 20  14.6  +56/272
12/29 02:20   11 22.11  +27 42.7   1.543   2.148  114.7   24.6   14.3/ 79.3   1.5/284   25 21  14.6  +57/272
12/30 02:20   11 23.18  +27 45.3   1.533   2.147  115.4   24.4   14.0/ 78.4   1.5/284   35 22  14.6  +57/272
12/31 02:20   11 24.21  +27 48.1   1.523   2.146  116.1   24.3   13.7/ 77.6   1.5/284   47 23  14.5  +58/273
01/01 02:20   11 25.21  +27 51.0   1.513   2.145  116.8   24.1   13.3/ 76.6   1.5/283   59 24  14.5  +59/273
01/02 02:10   11 26.19  +27 54.1   1.504   2.144  117.6   24.0   13.0/ 75.6   1.5/283   71 25  14.5  +57/272
01/03 02:10   11 27.14  +27 57.3   1.494   2.143  118.3   23.8   12.7/ 74.6   1.5/282   82 26  14.5  +58/272
01/04 02:10   11 28.06  +28 00.7   1.485   2.142  119.0   23.7   12.3/ 73.5   1.5/282   94 27  14.5  +59/273
01/05 02:10   11 28.95  +28 04.2   1.476   2.141  119.8   23.5   12.0/ 72.3   1.5/282  105 28  14.5  +59/273
01/06 02:10   11 29.81  +28 07.8   1.467   2.140  120.5   23.3   11.6/ 71.1   1.5/281  117 29  14.4  +60/273
01/07 02:10   11 30.65  +28 11.5   1.457   2.139  121.2   23.1   11.3/ 69.8   1.5/281  128  1  14.4  +61/274
01/08 02:00   11 31.44  +28 15.4   1.449   2.139  122.0   23.0   11.0/ 68.4   1.5/280  138  1  14.4  +59/273
inserted by FC2 system