MPEC 2004-K23 : 1997 WB21
The following Minor Planet Electronic Circular may be linked-to from your own Web pages, but must not otherwise be redistributed electronically.A form allowing access to any MPEC is at the bottom of this page.
Read MPEC 2004-K22
Read MPEC 2004-K24
M.P.E.C. 2004-K23 Issued 2004 May 20, 14:04 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.
Supported in part by the Steven and Michele Kirsch Foundation
Prepared using the Tamkin Foundation Computer Network
MPC@CFA.HARVARD.EDU
URL http://cfa-www.harvard.edu/iau/mpc.html ISSN 1523-6714
1997 WB21
Revision to MPEC 1997-X01
Additional Observations:
J97W21B C2004 05 17.29411 15 50 36.09 -26 30 28.3 20.5 R EK023926
J97W21B C2004 05 17.29644 15 50 35.82 -26 30 27.1 19.9 R EK023926
J97W21B C2004 05 17.29868 15 50 35.52 -26 30 26.3 20.4 R EK023926
J97W21B C2004 05 20.28617 15 44 53.04 -26 09 35.8 20.2 R EK023926
J97W21B C2004 05 20.28877 15 44 52.71 -26 09 34.4 20.1 R EK023926
J97W21B C2004 05 20.29137 15 44 52.38 -26 09 33.1 20.0 R EK023926
J97W21B C2004 05 20.29392 15 44 52.04 -26 09 32.0 20.2 R EK023926
J97W21B C2004 05 20.29653 15 44 51.74 -26 09 30.7 19.8 R EK023926
Observer details:
926 Tenagra II Observatory. Observers P. R. Holvorcem, M. Schwartz. 0.81-m
f/7 Ritchey-Chretien + CCD.
First and last observations above in comparison with prediction:
Residuals in seconds of arc (or two decimals in degrees), reference and Delta-T
040517 926 0.15+ 0.03- 040520 926 0.15+ 0.03- MPO 57666 -0.12 day
Orbital elements:
1997 WB21
Epoch 2004 July 14.0 TT = JDT 2453200.5 MPC
M 301.82691 (2000.0) P Q
n 0.55841825 Peri. 81.64290 +0.99706730 -0.04988103
a 1.4604824 Node 281.20192 +0.02194125 +0.91288528
e 0.3176009 Incl. 3.39203 +0.07331696 +0.40515719
P 1.76 H 20.3 G 0.15 U 4
Residuals in seconds of arc
971126 566 0.3- 1.2- 971203 658 0.6- 0.3+ 971227 104 1.3- 1.9-
971126 566 0.1+ 0.9- 971203 658 0.8- 0.7+ 971229 566 0.7- 0.8+
971126 566 0.3- 0.8- 971204 658 0.8+ 0.2- 971230 711 (2.6- 0.1-)
971129 566 0.3+ 0.3+ 971204 658 0.7+ 0.1+ 971230 711 0.8+ 0.2-
971129 566 0.2- 0.2- 971204 658 0.2+ 0.1+ 971231 711 1.8+ 0.1+
971129 566 0.3+ 0.1+ 971204 402 0.7+ 0.5+ 971231 711 0.7- 0.1-
971130 566 0.1+ 0.4+ 971204 402 0.6+ 0.1+ 980101 711 (2.4+ 0.2-)
971130 566 0.2+ 0.6+ 971204 402 1.2+ 0.7- 980101 711 (3.0- 0.2-)
971130 566 0.1+ 0.9+ 971205 658 0.4+ 0.9- 040517 926 0.0 0.3-
971130 566 0.0 0.6+ 971205 658 0.1+ 0.3- 040517 926 0.1+ 0.0
971130 566 0.1+ 0.3+ 971205 658 0.4+ 0.6- 040517 926 0.4- 0.0
971130 566 0.1- 0.8+ 971207 587 0.6- 0.3+ 040520 926 0.3+ 0.3-
971130 587 0.3+ 0.1- 971207 587 0.5- 0.2+ 040520 926 0.2+ 0.0
971130 587 0.2+ 0.2- 971218 658 1.9- 0.4+ 040520 926 0.1+ 0.1+
971202 658 0.4- 0.2+ 971218 658 0.8- 0.4- 040520 926 0.3- 0.1+
971202 658 0.6- 0.2- 971218 658 1.1+ 0.4+ 040520 926 0.0 0.2+
971202 658 0.8- 0.1+ 971227 104 0.7+ 0.1+
971203 658 0.6- 0.2+ 971227 104 0.2+ 0.2+
Ephemeris:
1997 WB21 a,e,i = 1.46, 0.32, 3 q = 0.9966
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2004 05 15 15 54.79 -26 44.1 0.605 1.611 170.1 6.2 20.7
2004 05 25 15 35.50 -25 30.3 0.562 1.571 171.2 5.7 20.5
2004 06 04 15 15.71 -23 47.3 0.539 1.529 158.5 14.1 20.7
2004 06 14 14 58.86 -21 51.2 0.534 1.486 145.1 23.0 20.9
2004 06 24 14 47.49 -20 03.1 0.543 1.440 132.6 31.3 21.1
2004 07 04 14 42.60 -18 38.5 0.560 1.394 121.6 38.4 21.3
2004 07 14 14 43.98 -17 43.0 0.580 1.347 112.2 44.3 21.5
2004 07 24 14 51.03 -17 15.6 0.600 1.299 104.1 49.3 21.6
2004 08 03 15 03.06 -17 11.5 0.616 1.252 97.3 53.5 21.7
2004 08 13 15 19.43 -17 23.8 0.627 1.205 91.5 57.2 21.8
2004 08 23 15 39.76 -17 45.9 0.631 1.161 86.7 60.4 21.8
2004 09 02 16 03.78 -18 10.6 0.629 1.119 82.7 63.4 21.8
2004 09 12 16 31.29 -18 30.7 0.619 1.081 79.5 66.2 21.8
2004 09 22 17 02.31 -18 39.0 0.603 1.049 77.1 68.8 21.7
2004 10 02 17 36.78 -18 27.5 0.582 1.024 75.5 71.2 21.7
2004 10 12 18 14.73 -17 48.6 0.557 1.006 74.7 73.1 21.6
2004 10 22 18 56.23 -16 34.5 0.532 0.997 74.8 74.3 21.5
2004 11 01 19 41.18 -14 37.8 0.508 0.998 75.8 74.6 21.4
2004 11 11 20 29.28 -11 54.5 0.490 1.008 77.9 73.7 21.3
2004 11 21 21 19.91 -08 25.3 0.480 1.027 80.8 71.7 21.3
2004 12 01 22 11.84 -04 20.2 0.483 1.054 84.3 68.6 21.2
2004 12 11 23 03.51 +00 01.8 0.500 1.087 87.8 64.8 21.3
2004 12 21 23 53.46 +04 19.0 0.533 1.125 90.8 60.9 21.4
2004 12 31 00 40.51 +08 13.3 0.582 1.168 92.9 57.2 21.5
2005 01 10 01 24.18 +11 35.1 0.645 1.213 94.0 54.0 21.7
2005 01 20 02 04.53 +14 22.7 0.721 1.260 94.0 51.2 22.0
Timothy B. Spahr (C) Copyright 2004 MPC M.P.E.C. 2004-K23
Read MPEC 2004-K22
Read MPEC 2004-K24
Enter an MPEC number in one of the following forms:
- 1997-B01 (the full form)
- J97B01 (the packed version of the full form)
- B01 (the abbreviated form)
