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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