MPEC 1998-S21 : 1998 SD9
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M.P.E.C. 1998-S21 Issued 1998 Sept. 22, 17:55 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 SD9
Observations:
J98S09D* C1998 09 18.32769 23 42 29.08 -10 42 43.0 19.0 704
J98S09D C1998 09 18.34078 23 42 11.90 -10 44 59.6 18.2 704
J98S09D C1998 09 18.35399 23 41 54.79 -10 47 16.9 18.4 704
J98S09D C1998 09 18.36706 23 41 37.59 -10 49 28.9 18.3 704
J98S09D C1998 09 19.34472 23 21 21.25 -13 33 29.7 18.5 R 673
J98S09D C1998 09 19.34825 23 21 16.73 -13 34 03.4 673
J98S09D C1998 09 19.35262 23 21 11.08 -13 34 46.7 673
J98S09D C1998 09 19.36972 23 20 48.96 -13 37 31.3 673
J98S09D C1998 09 19.40907 23 20 11.55 -13 40 49.4 18.9 R 422
J98S09D C1998 09 19.41228123 20 07.50 -13 41 21.1 18.8 R 422
J98S09D C1998 09 19.41391823 20 05.46 -13 41 36.2 19.1 R 422
J98S09D C1998 09 19.49496523 18 20.99 -13 54 49.8 18.4 R 422
J98S09D C1998 09 19.49625123 18 19.27 -13 55 03.0 18.4 R 422
J98S09D C1998 09 21.25712 22 42 44.16 -18 16 41.3 19.0 704
J98S09D C1998 09 21.27944 22 42 16.67 -18 19 37.1 19.6 704
J98S09D C1998 09 21.30166 22 41 49.52 -18 22 33.0 19.6 704
J98S09D C1998 09 21.32383 22 41 22.56 -18 25 21.4 20.0 704
J98S09D C1998 09 21.97718 22 28 56.63 -19 47 25.8 21.5 954
J98S09D C1998 09 21.97755 22 28 56.19 -19 47 28.5 954
J98S09D C1998 09 21.97789 22 28 55.76 -19 47 30.4 954
J98S09D C1998 09 21.97822 22 28 55.40 -19 47 33.2 954
J98S09D C1998 09 21.97856 22 28 55.00 -19 47 35.8 954
J98S09D C1998 09 22.51216422 19 01.92 -20 46 43.8 19.5 R 422
J98S09D C1998 09 22.51296322 19 00.76 -20 46 50.7 19.4 R 422
J98S09D C1998 09 22.51603022 18 57.36 -20 47 10.1 19.3 R 422
J98S09D C1998 09 22.51700222 18 56.25 -20 47 16.3 18.6 R 422
J98S09D C1998 09 22.51773122 18 55.38 -20 47 21.0 18.9 R 422
Observer details:
422 Loomberah. Observer G. J. Garradd. 0.45-m f/5.4 reflector + CCD.
673 Table Mountain Observatory, Wrightwood. Observers D. L. Rabinowitz,
A. Boattini. 0.6-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.
954 Teide Observatory. Observer R. Casas. 1.0-m f/13 reflector + CCD.
Orbital elements:
1998 SD9
Epoch 1998 July 6.0 TT = JDT 2451000.5 Williams
M 60.02060 (2000.0) P Q
n 1.67213878 Peri. 6.26202 -0.99339114 -0.11422528
a 0.7029987 Node 167.16269 +0.10298751 -0.93033142
e 0.5039428 Incl. 2.90302 +0.05067159 -0.34847672
P 0.59 H 24.0 G 0.15 U 9
From 26 observations 1998 Sept. 18-22, mean residual 0".89.
Ephemeris:
1998 SD9 a,e,i = 0.70, 0.50, 3 q = 0.3487
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
1998 09 14 01 06.83 +01 48.3 0.056 1.057 154.5 24.2 19.0
1998 09 15 00 48.88 -00 55.7 0.054 1.057 160.3 18.7 18.8
1998 09 16 00 29.83 -03 48.8 0.053 1.057 166.1 13.2 18.5
1998 09 17 00 09.88 -06 46.5 0.053 1.057 170.9 8.7 18.3
1998 09 18 23 49.33 -09 43.7 0.052 1.057 172.0 7.6 18.3
1998 09 19 23 28.56 -12 34.7 0.053 1.057 168.3 11.1 18.4
1998 09 20 23 07.93 -15 14.7 0.054 1.056 162.8 16.3 18.7
1998 09 21 22 47.81 -17 39.9 0.055 1.055 156.9 21.9 18.9
1998 09 22 22 28.52 -19 48.2 0.058 1.055 151.2 27.3 19.1
1998 09 23 22 10.31 -21 39.0 0.060 1.054 145.8 32.4 19.4
1998 09 24 21 53.32 -23 13.1 0.063 1.053 140.7 37.1 19.6
1998 09 25 21 37.63 -24 31.8 0.066 1.052 136.0 41.5 19.8
1998 09 26 21 23.27 -25 37.0 0.069 1.050 131.7 45.5 20.0
1998 09 27 21 10.18 -26 30.7 0.073 1.049 127.7 49.1 20.3
1998 09 28 20 58.30 -27 14.7 0.077 1.047 124.0 52.5 20.5
1998 09 29 20 47.55 -27 50.6 0.081 1.045 120.6 55.6 20.7
1998 09 30 20 37.82 -28 20.0 0.085 1.044 117.5 58.4 20.8
1998 10 01 20 29.02 -28 44.0 0.089 1.042 114.6 61.0 21.0
1998 10 02 20 21.05 -29 03.5 0.094 1.040 111.8 63.4 21.2
1998 10 03 20 13.83 -29 19.6 0.098 1.037 109.3 65.6 21.4
1998 10 04 20 07.27 -29 32.7 0.103 1.035 106.9 67.7 21.5
1998 10 05 20 01.29 -29 43.5 0.107 1.032 104.6 69.6 21.7
1998 10 06 19 55.84 -29 52.3 0.112 1.030 102.4 71.5 21.8
1998 10 07 19 50.85 -29 59.5 0.116 1.027 100.4 73.2 21.9
1998 10 08 19 46.27 -30 05.4 0.121 1.024 98.4 74.9 22.1
1998 10 09 19 42.05 -30 10.3 0.125 1.021 96.5 76.5 22.2
1998 10 10 19 38.16 -30 14.3 0.130 1.018 94.7 78.0 22.3
1998 10 11 19 34.56 -30 17.5 0.135 1.014 93.0 79.4 22.4
1998 10 12 19 31.21 -30 20.1 0.139 1.011 91.3 80.8 22.6
1998 10 13 19 28.10 -30 22.3 0.144 1.007 89.6 82.2 22.7
1998 10 14 19 25.18 -30 24.0 0.148 1.003 88.0 83.5 22.8
Gareth V. Williams (C) Copyright 1998 MPC M.P.E.C. 1998-S21
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- B01 (the abbreviated form)