MPEC 1998-W21 : 1998 WB2
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M.P.E.C. 1998-W21 Issued 1998 Nov. 20, 16:52 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 WB2
Observations:
J98W02B* C1998 11 18.26448 03 47 54.04 +21 05 31.5 18.1 704
J98W02B C1998 11 18.30914 03 47 54.30 +21 06 34.8 18.7 704
J98W02B C1998 11 18.35359 03 47 54.59 +21 07 38.1 18.7 704
J98W02B C1998 11 18.39861 03 47 54.92 +21 08 41.3 18.8 704
J98W02B C1998 11 18.97469 03 48 15.38 +21 23 01.5 17.5 V 046
J98W02B C1998 11 18.97630 03 48 15.42 +21 23 03.7 046
J98W02B C1998 11 18.97774 03 48 15.41 +21 23 05.9 046
J98W02B C1998 11 18.97934 03 48 15.44 +21 23 08.5 046
J98W02B C1998 11 19.13482 03 48 23.69 +21 27 19.0 18.6 V 734
J98W02B C1998 11 19.13892 03 48 23.82 +21 27 26.5 18.2 V 734
J98W02B C1998 11 19.14301 03 48 23.91 +21 27 33.5 734
J98W02B C1998 11 19.17699 03 48 25.11 +21 28 32.9 18.0 704
J98W02B C1998 11 19.19890 03 48 25.43 +21 29 10.2 18.5 704
J98W02B C1998 11 19.22078 03 48 25.78 +21 29 46.4 18.8 704
J98W02B C1998 11 19.24273 03 48 25.86 +21 30 22.6 19.3 704
J98W02B C1998 11 19.26467 03 48 26.16 +21 30 58.8 19.0 704
J98W02B C1998 11 19.50851 03 48 36.37 +21 37 34.8 18.0 V 402
J98W02B C1998 11 19.50990 03 48 36.36 +21 37 38.0 402
J98W02B C1998 11 19.51128 03 48 36.44 +21 37 40.2 402
J98W02B C1998 11 19.51267 03 48 36.48 +21 37 42.8 402
J98W02B C1998 11 19.53529 03 48 36.89 +21 39 32.5 17.8 R 426
J98W02B C1998 11 19.53873 03 48 36.85 +21 39 38.5 17.6 R 426
J98W02B C1998 11 19.54272 03 48 36.92 +21 39 46.1 17.6 R 426
J98W02B C1998 11 19.79447 03 48 46.82 +21 45 22.1 557
J98W02B C1998 11 19.79682 03 48 46.86 +21 45 26.4 557
J98W02B C1998 11 19.79913 03 48 46.95 +21 45 30.4 557
J98W02B C1998 11 19.91940 03 48 49.38 +21 49 12.4 106
J98W02B C1998 11 19.93263 03 48 49.58 +21 49 36.0 106
J98W02B C1998 11 19.94236 03 48 49.77 +21 49 52.3 106
J98W02B C1998 11 19.95026 03 48 50.19 +21 50 07.1 17.4 R 587
J98W02B C1998 11 19.95817 03 48 50.29 +21 50 21.0 587
J98W02B C1998 11 19.96262 03 48 49.93 +21 50 28.6 106
J98W02B C1998 11 20.07172 03 48 55.79 +21 55 04.4 17.5 R 860
J98W02B C1998 11 20.08160 03 48 55.99 +21 55 21.7 17.5 R 860
J98W02B C1998 11 20.11457 03 48 52.92 +21 54 49.9 118
J98W02B C1998 11 20.11745 03 48 52.99 +21 54 54.5 17.3 R 118
Observer details:
046 Klet. Observers M. Tichy, Z. Moravec. Measurer M. Tichy. 0.57-m f/5.2
reflector + CCD.
106 Crni Vrh. Observers H. Mikuz, B. Dintinjana, S. Maticic. 0.36-m f/6.7
Schmidt-Cassegrain + CCD.
118 Modra. Observers L. Kornos, P. Koleny. 0.6-m f/5.5 reflector + CCD.
402 Dynic Astronomical Observatory. Observer A. Sugie. 0.60-m f/3.7 reflector
+ CCD.
426 Woomera. Observer F. B. Zoltowski. 0.30-m f/3.3 Schmidt-Cassegrain + CCD.
557 Ondrejov. Observer P. Pravec. 0.65-m f/3.6 reflector + CCD.
587 Sormano. Observers P. Sicoli, A. Testa. 0.5-m reflector + CCD.
704 Lincoln Laboratory ETS, New Mexico. Observers M. Blythe, F. Shelly,
M. Bezpalko. Measurers J. Stuart, H. Viggh, R. Sayer. 1.0-m f/2.15
reflector + CCD.
734 Farpoint Observatory. Observers G. Hug, G. Bell. 0.30-m
Schmidt-Cassegrain + CCD.
860 Valinhos. Observer P. R. Holvorcem. 0.20-m f/3.3 reflector + CCD.
Orbital elements:
1998 WB2 PHA 0.014
Epoch 1998 Nov. 3.0 TT = JDT 2451120.5 Williams
M 334.01901 (2000.0) P Q
n 0.36298096 Peri. 77.53548 -0.64940187 -0.75970465
a 1.9463166 Node 53.01294 +0.68036227 -0.60015826
e 0.5763967 Incl. 2.40773 +0.33968278 -0.25031761
P 2.72 H 21.7 G 0.15
From 36 observations 1998 Nov. 18-20.
Ephemeris:
1998 WB2 a,e,i = 1.95, 0.58, 2 q = 0.8245
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
1998 11 13 03 45.71 +19 29.4 0.181 1.170 171.8 6.9 18.8
1998 11 14 03 46.07 +19 44.0 0.173 1.161 172.7 6.2 18.7
1998 11 15 03 46.45 +20 00.1 0.164 1.153 173.6 5.5 18.5
1998 11 16 03 46.85 +20 17.8 0.156 1.144 174.4 4.8 18.4
1998 11 17 03 47.28 +20 37.5 0.147 1.136 175.2 4.2 18.2
1998 11 18 03 47.75 +20 59.5 0.139 1.127 176.0 3.5 18.0
1998 11 19 03 48.27 +21 24.2 0.131 1.119 176.6 3.0 17.8
1998 11 20 03 48.86 +21 52.1 0.122 1.111 177.0 2.6 17.6
1998 11 21 03 49.53 +22 23.8 0.114 1.102 177.2 2.5 17.5
1998 11 22 03 50.30 +23 00.2 0.106 1.094 177.0 2.7 17.3
1998 11 23 03 51.20 +23 42.4 0.098 1.086 176.5 3.2 17.2
1998 11 24 03 52.28 +24 31.8 0.090 1.078 175.8 3.9 17.0
1998 11 25 03 53.60 +25 30.3 0.083 1.070 174.8 4.8 16.8
1998 11 26 03 55.23 +26 40.7 0.075 1.062 173.7 5.9 16.7
1998 11 27 03 57.29 +28 06.8 0.067 1.054 172.3 7.2 16.5
1998 11 28 03 59.98 +29 54.3 0.060 1.046 170.7 8.7 16.3
1998 11 29 04 03.62 +32 12.0 0.052 1.038 168.7 10.7 16.0
1998 11 30 04 08.77 +35 13.6 0.045 1.030 166.0 13.4 15.8
1998 12 01 04 16.56 +39 22.0 0.038 1.022 162.2 17.1 15.5
1998 12 02 04 29.66 +45 15.9 0.031 1.015 156.6 22.7 15.3
1998 12 03 04 55.77 +53 57.7 0.025 1.007 147.9 31.4 15.0
1998 12 04 06 07.78 +66 15.9 0.020 1.000 133.8 45.4 14.9
1998 12 05 10 27.3 +73 00.9 0.017 0.992 112.6 66.5 15.2
1998 12 06 13 38.50 +55 52.6 0.018 0.985 88.1 90.9 16.1
1998 12 07 14 29.87 +37 01.4 0.021 0.978 68.5 110.3 17.4
1998 12 08 14 50.87 +24 04.1 0.026 0.971 56.0 122.7 18.8
1998 12 09 15 02.14 +15 40.0 0.033 0.964 48.4 130.2 19.9
1998 12 10 15 09.19 +10 01.9 0.039 0.957 43.7 134.7 20.8
1998 12 11 15 14.04 +06 03.7 0.046 0.950 40.7 137.4 21.4
1998 12 12 15 17.61 +03 08.2 0.054 0.943 38.9 139.1 22.0
1998 12 13 15 20.38 +00 53.9 0.061 0.937 37.7 140.0 22.3
Gareth V. Williams (C) Copyright 1998 MPC M.P.E.C. 1998-W21
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