MPEC 2001-L07: 1999 WA2
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M.P.E.C. 2001-L07 Issued 2001 June 3, 18:33 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.
Prepared using the Tamkin Foundation Computer Network
MPC@CFA.HARVARD.EDU
URL http://cfa-www.harvard.edu/iau/mpc.html ISSN 1523-6714
1999 WA2
Revision to MPEC 1999-W31
Observations:
J99W02A 1C2001 03 13.69744 13 40 48.24 -59 54 36.6 413
J99W02A 1C2001 03 13.69972 13 40 48.02 -59 54 38.1 413
J99W02A 1C2001 03 13.70200 13 40 47.72 -59 54 39.8 413
J99W02A 1C2001 03 13.70854 13 40 47.54 -59 54 42.0 413
J99W02A 1C2001 03 13.71191 13 40 47.22 -59 54 44.6 413
J99W02A 1C2001 03 13.71418 13 40 46.93 -59 54 44.4 413
J99W02A 1C2001 03 13.71645 13 40 46.79 -59 54 47.8 413
J99W02A 1C2001 05 31.53568 11 52 09.70 -51 56 20.2 413
J99W02A 1C2001 05 31.53889 11 52 09.76 -51 56 17.0 413
J99W02A 1C2001 05 31.54245 11 52 09.73 -51 56 14.0 413
J99W02A 1C2001 06 02.37342 11 52 25.92 -51 26 05.7 20.0 R 413
J99W02A 1C2001 06 02.37762 11 52 25.95 -51 26 01.6 20.0 R 413
J99W02A 1C2001 06 02.37969 11 52 25.97 -51 25 59.7 413
Observer details:
413 Siding Spring. Observer R. H. McNaught. 1.0-m f/8 reflector + CCD.
First and last observations above in comparison with prediction:
Residuals in seconds of arc, reference and Delta-T
010313 413 9.3+ 3.4- 010602 413 6.4+ 6.6- MPC 39555 -0.023 day
Orbital elements:
1999 WA2
Epoch 2001 Apr. 1.0 TT = JDT 2452000.5 Spahr
M 227.22498 (2000.0) P Q
n 0.35737244 Peri. 75.23225 +0.83088466 -0.19923306
a 1.9666271 Node 293.85639 -0.13710386 +0.83161712
e 0.4338375 Incl. 34.61721 +0.53928955 +0.51838128
P 2.76 H 15.8 G 0.15 U 3
Residuals in seconds of arc
991116 704 0.2+ 0.1+ 991209 118 0.1+ 0.3- 000208 704 1.7+ 0.6+
991116 704 1.2- 0.3- 991209 118 0.2+ 0.3- 000208 704 0.4+ 0.3+
991116 704 1.1+ 1.1+ 991214 118 0.6+ 0.0 000208 704 0.7+ 0.7+
991116 704 0.3- 0.2+ 991214 118 0.1+ 0.1- 000208 704 0.3- 1.1+
991117 651 0.0 0.3- 991230 413 0.3- 0.0 000210 706 (2.7- 2.8+)
991117 651 0.3- 0.3- 991230 413 0.3- 0.2+ 000210 706 0.3- 0.1+
991117 651 0.0 0.4- 000103 360 0.2- 0.2+ 000303 474 0.2+ 0.2+
991119 557 0.3+ 0.3+ 000103 360 0.4- 0.2+ 000303 474 0.2+ 0.1+
991119 557 0.0 0.4+ 000103 360 0.1- 0.3+ 000303 474 0.0 0.2-
991119 557 0.3+ 0.4+ 000108 704 0.7+ 0.3- 000303 474 0.2- 0.1-
991121 046 0.1- 0.3+ 000108 704 0.5- 0.2+ 000303 474 0.0 0.0
991121 046 0.0 0.0 000108 704 0.0 0.2- 000307 360 0.4- 0.5-
991121 046 0.3- 0.1- 000108 704 1.2- 0.1+ 000307 360 0.1+ 0.1+
991121 046 0.1- 0.5+ 000108 704 0.7- 0.9- 000307 360 0.7- 0.0
991121 046 0.1+ 0.3- 000111 704 0.1- 0.5+ 010313 413 0.4+ 0.7-
991127 046 0.7+ 0.3+ 000111 704 0.5- 0.0 010313 413 0.0 0.8-
991127 046 0.1- 0.1- 000111 704 0.3- 0.4- 010313 413 1.1- 1.1-
991127 046 0.6+ 0.8+ 000111 704 1.1- 0.2- 010313 413 1.0+ 0.6+
991127 046 0.5+ 0.4- 000111 704 0.6- 0.4- 010313 413 0.4+ 0.1+
991127 046 0.6+ 0.8+ 000129 402 0.1+ 0.1- 010313 413 0.6- 1.6+
991207 704 0.1+ 0.7- 000129 402 0.9+ 0.8- 010313 413 0.5- 0.4-
991207 704 0.2- 0.3- 000129 402 1.3+ 0.6- 010531 413 0.0 0.2+
991207 704 0.2- 1.0- 000204 422 0.1+ 0.2+ 010531 413 0.4+ 0.1+
991207 704 0.7- 0.5- 000204 422 0.2- 0.1+ 010531 413 0.1- 0.5-
991207 402 0.7+ 0.0 000204 422 0.0 0.1- 010602 413 0.2+ 0.2+
991207 402 0.4- 0.4- 000204 360 0.1+ 0.2+ 010602 413 0.1+ 0.2+
991207 402 0.5+ 0.1+ 000204 360 0.2- 0.1- 010602 413 0.1+ 0.0
991209 118 0.3- 0.3- 000204 360 0.1+ 0.2+
Ephemeris:
1999 WA2 a,e,i = 1.97, 0.43, 35 q = 1.1134
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2001 05 21 11 53.78 -54 50.5 1.843 2.549 123.8 19.3 20.1
2001 05 31 11 52.12 -52 05.2 1.861 2.518 119.3 20.5 20.2
2001 06 10 11 55.04 -49 23.2 1.894 2.486 114.0 21.9 20.2
2001 06 20 12 01.73 -46 52.6 1.938 2.452 108.1 23.2 20.3
2001 06 30 12 11.51 -44 38.6 1.991 2.416 101.9 24.3 20.3
2001 07 10 12 23.79 -42 43.5 2.050 2.378 95.7 25.2 20.4
2001 07 20 12 38.12 -41 07.4 2.114 2.339 89.6 25.8 20.4
2001 07 30 12 54.21 -39 49.4 2.178 2.297 83.5 26.0 20.5
2001 08 09 13 11.78 -38 47.4 2.243 2.255 77.6 26.1 20.5
2001 08 19 13 30.69 -37 58.7 2.305 2.210 71.9 25.8 20.5
2001 08 29 13 50.81 -37 20.7 2.363 2.164 66.2 25.3 20.5
2001 09 08 14 12.03 -36 50.2 2.417 2.116 60.8 24.5 20.5
Timothy B. Spahr (C) Copyright 2001 MPC M.P.E.C. 2001-L07
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