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  • MPEC 1998-P23 : 1998 OH

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    M.P.E.C. 1998-P23                                Issued 1998 Aug. 15, 14:23 UT
    
         The Minor Planet Electronic Circulars contain information on unusual
             minor planets and routine data on comets.  They are published
       on behalf of Commission 20 of the International Astronomical Union by the
              Minor Planet Center, Smithsonian Astrophysical Observatory,
                              Cambridge, MA 02138, U.S.A.
    
                 BMARSDEN@CFA.HARVARD.EDU or GWILLIAMS@CFA.HARVARD.EDU
                       URL http://cfa-www.harvard.edu/iau/mpc.html
    
                                        1998 OH
    
                               Revision to MPEC 1998-O16
    
    Observations:
         J98O00H   1993 11 09.31736 02 21 00.35 +12 33 57.8                      675
         J98O00H   1993 11 09.34722 02 20 57.48 +12 33 11.7                      675
         J98O00H   1993 11 10.26962 02 19 27.92 +12 09 12.9          17.3        675
         J98O00H   1993 11 10.29253 02 19 25.56 +12 08 38.1                      675
         J98O00H  C1998 07 26.96574 17 50 10.56 +30 25 52.3                      118
         J98O00H  C1998 07 26.96875 17 50 10.54 +30 25 48.6          17.4 R      118
         J98O00H  C1998 08 06.86466 17 52 19.14 +26 17 06.9                      046
         J98O00H  C1998 08 06.86473 17 52 19.09 +26 17 06.8                      557
         J98O00H  C1998 08 06.86634 17 52 19.16 +26 17 04.4                      046
         J98O00H  C1998 08 06.86855 17 52 19.20 +26 17 01.6                      557
         J98O00H  C1998 08 06.87032 17 52 19.24 +26 16 58.8          18.2 V      557
         J98O00H  C1998 08 06.87072 17 52 19.28 +26 16 58.5                      046
         J98O00H  C1998 08 07.88956 17 52 45.08 +25 53 43.3          18.3        954
         J98O00H  C1998 08 07.91323 17 52 45.32 +25 53 06.7          16.9 V      046
         J98O00H  C1998 08 07.91722 17 52 45.48 +25 53 01.5                      046
         J98O00H  C1998 08 07.92499 17 52 45.63 +25 52 50.5                      046
         J98O00H  C1998 08 07.95102 17 52 46.44 +25 52 19.1          17.7        954
         J98O00H  C1998 08 08.87387 17 53 11.88 +25 31 13.7          18.0        954
         J98O00H  C1998 08 08.90499 17 53 12.63 +25 30 31.2          17.9        954
         J98O00H  C1998 08 10.85229 17 54 11.17 +24 46 06.3          18.0 V      046
         J98O00H  C1998 08 10.85535 17 54 11.24 +24 46 01.9                      046
         J98O00H  C1998 08 10.85741 17 54 11.31 +24 45 59.4                      046
         J98O00H  C1998 08 11.86204 17 54 44.43 +24 23 11.1          17.5 V      046
         J98O00H  C1998 08 11.86451 17 54 44.51 +24 23 07.7                      046
         J98O00H  C1998 08 11.86623 17 54 44.56 +24 23 05.4                      046
         J98O00H  C1998 08 11.86730 17 54 44.60 +24 23 03.7                      046
         J98O00H  C1998 08 14.90667 17 56 36.10 +23 14 32.6          17.3 R      118
         J98O00H  C1998 08 14.91299 17 56 36.33 +23 14 24.3                      118
    
    Observer details:
    046 Klet.  Observers J. Ticha, M. Tichy, Z. Moravec.  Measurer M. Tichy.
        0.57-m f/5.2 reflector + CCD.
    118 Modra.  Observers S. Gajdos, P. Koleny, L. Kornos, A. Pravda.  0.6-m f/5.5
        reflector + CCD.
    557 Ondrejov.  Observer L. Sarounova.  0.65-m f/3.6 reflector + CCD.
    675 Palomar Mountain.  Observers E. Helin, K. Lawrence, J. Alu.  Measurers
        F. Seelos, K. Lawrence.  0.46-m Schmidt.
    954 Teide Observatory.  Observers F. Casarramona, E. Vigil, R. Casas.
        0.80-m f/11 reflector + CCD.
    
    First and last observations above in comparison with prediction:
    Residuals in seconds of arc (or two decimals in degrees) and reference
    931109 675 0.05+ 0.02+    931110 675 0.06+ 0.02+    MPEC 1998-P21
    
    Orbital elements:
    1998 OH                                                              PHA 0.024A
    Id. F. Seelos, K. Lawrence (1993 observations)
    Epoch 1998 July 6.0 TT = JDT 2451000.5                  Marsden
    M  53.64389              (2000.0)            P               Q
    n   0.51498281     Peri.  321.51519     -0.96247262     -0.00461374
    a   1.5414906      Node   220.86363     +0.02569500     -0.99691289
    e   0.4064229      Incl.   24.50212     -0.27015963     -0.07837987
    P   1.91           H   16.0           G   0.15           U   4
    Residuals in seconds of arc
    931109 675  1.2-  0.1+    980725 402  0.3-  0.3-    980806 557  0.4-  0.0
    931109 675  1.0+  0.6+    980725 587  0.6+  0.9-    980806 046  0.1+  0.3-
    931110 675  0.5+  0.8-    980725 587  0.6+  0.3-    980806 557  0.0   0.1+
    931110 675  0.3-  0.1+    980725 611  0.2+  0.2+    980806 557  0.1+  0.3-
    980719 566  0.1-  0.1+    980725 611  0.4+  0.2+    980806 046  0.5+  0.2-
    980719 566  0.1-  0.3+    980725 611  0.1-  0.2-    980807 954  0.0   0.1+
    980719 566  0.4-  0.2+    980726 557  0.1-  0.2-    980807 046  0.3-  0.1-
    980720 566  0.4-  0.5+    980726 557  0.2+  0.6-    980807 046  0.6+  0.2+
    980720 566  0.0   0.2+    980726 046  0.1-  0.2-    980807 046  0.1+  0.0
    980720 566  0.5+  0.2+    980726 046  0.0   0.1+    980807 954  0.1+  0.3+
    980724 566  0.1+  0.3+    980726 046  0.0   0.3-    980808 954  0.0   0.1+
    980724 566  0.0   0.3+    980726 046  0.1+  0.1+    980808 954  0.1+  0.2+
    980724 566  0.4+  0.6+    980726 118  0.1+  1.1-    980810 046  0.1-  0.4+
    980724 598  0.4-  0.1-    980726 118  0.0   0.7-    980810 046  0.4-  0.2+
    980724 598  0.3-  0.3-    980728 587  0.0   0.2-    980810 046  0.2-  0.5+
    980724 598  0.3-  0.1-    980728 587  0.2+  0.6-    980811 046  0.1-  0.1+
    980724 598  0.3-  0.0     980730 620  1.8+  1.3-    980811 046  0.1-  0.1+
    980724 557  0.1-  0.5-    980730 620  0.0   0.5+    980811 046  0.1-  0.1+
    980724 557  0.2+  0.2-    980730 620  1.3-  0.2+    980811 046  0.0   0.1-
    980725 673  0.4-  1.1+    980731 557  0.2+  0.0     980814 118  0.0   0.3+
    980725 673  0.3-  1.0+    980731 557  0.5+  0.6-    980814 118  0.1-  0.5+
    980725 402  0.0   0.2+    980731 557  0.1-  0.3-
    980725 402  0.5-  0.7+    980806 046  0.3+  0.1-
    
    Ephemeris:
    1998 OH                  a,e,i = 1.54, 0.41, 25                  q = 0.9150
    Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
    1998 08 15    17 56.67   +23 12.5    0.916    1.621   114.3    34.7    18.3
    1998 08 20    18 00.33   +21 21.8    0.965    1.648   112.9    34.4    18.4
    1998 08 25    18 04.67   +19 34.2    1.015    1.673   111.4    34.2    18.6
    1998 08 30    18 09.62   +17 50.6    1.068    1.698   109.7    34.0    18.7
    1998 09 04    18 15.12   +16 11.5    1.122    1.723   107.8    33.9    18.8
    1998 09 09    18 21.10   +14 37.4    1.177    1.747   105.9    33.7    19.0
    1998 09 14    18 27.51   +13 08.6    1.235    1.770   103.9    33.5    19.1
    1998 09 19    18 34.32   +11 45.1    1.294    1.792   101.7    33.3    19.2
    1998 09 24    18 41.49   +10 27.3    1.354    1.814    99.6    33.0    19.3
    1998 09 29    18 48.97   +09 15.3    1.416    1.835    97.3    32.8    19.5
    1998 10 04    18 56.74   +08 09.1    1.479    1.856    95.0    32.5    19.6
    1998 10 09    19 04.76   +07 08.6    1.543    1.876    92.6    32.1    19.7
    1998 10 14    19 13.00   +06 13.8    1.607    1.895    90.2    31.8    19.8
    1998 10 19    19 21.43   +05 24.5    1.673    1.914    87.8    31.3    19.9
    1998 10 24    19 30.05   +04 40.8    1.739    1.932    85.3    30.9    20.0
    1998 10 29    19 38.81   +04 02.6    1.806    1.949    82.8    30.4    20.0
    1998 11 03    19 47.71   +03 29.5    1.873    1.965    80.3    29.8    20.1
    1998 11 08    19 56.71   +03 01.6    1.939    1.981    77.7    29.3    20.2
    1998 11 13    20 05.81   +02 38.5    2.006    1.997    75.1    28.6    20.3
    1998 11 18    20 14.99   +02 20.2    2.073    2.011    72.6    28.0    20.3
    1998 11 23    20 24.24   +02 06.4    2.139    2.025    70.0    27.3    20.4
    1998 11 28    20 33.54   +01 57.1    2.204    2.038    67.3    26.5    20.5
    1998 12 03    20 42.89   +01 51.9    2.268    2.051    64.7    25.8    20.5
    1998 12 08    20 52.25   +01 50.7    2.332    2.063    62.1    25.0    20.6
    1998 12 13    21 01.64   +01 53.3    2.394    2.074    59.4    24.1    20.6
    1998 12 18    21 11.05   +01 59.4    2.455    2.085    56.8    23.3    20.6
    1998 12 23    21 20.46   +02 09.0    2.514    2.095    54.1    22.4    20.7
    1998 12 28    21 29.87   +02 21.8    2.571    2.104    51.5    21.4    20.7
    1999 01 02    21 39.28   +02 37.6    2.626    2.113    48.8    20.5    20.7
    1999 01 07    21 48.67   +02 56.1    2.680    2.121    46.2    19.5    20.8
    1999 01 12    21 58.05   +03 17.3    2.731    2.129    43.6    18.6    20.8
    1999 01 17    22 07.42   +03 41.0    2.779    2.136    40.9    17.6    20.8
    1999 01 22    22 16.78   +04 06.9    2.825    2.142    38.3    16.5    20.8
    1999 01 27    22 26.11   +04 34.9    2.869    2.147    35.7    15.5    20.8
    1999 02 01    22 35.43   +05 04.7    2.909    2.152    33.1    14.5    20.8
    
    Brian G. Marsden             (C) Copyright 1998 MPC           M.P.E.C. 1998-P23
    

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