MPEC 2008-R24 : 1998 SD9
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M.P.E.C. 2008-R24 Issued 2008 Sept. 4, 22:22 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://www.cfa.harvard.edu/iau/mpc.html ISSN 1523-6714
1998 SD9
Revision to MPEC 1998-S21
Additional Observations:
J98S09D C2008 08 30.32769 02 33 30.43 +25 51 09.6 19.2 ER024704
J98S09D C2008 08 30.34050 02 33 08.92 +25 49 41.1 20.1 ER024704
J98S09D C2008 08 30.35332 02 32 47.29 +25 48 12.7 18.9 ER024704
J98S09D C2008 08 30.36618 02 32 25.44 +25 46 43.6 19.0 ER024704
J98S09D C2008 08 30.37906 02 32 03.45 +25 45 13.0 18.9 ER024704
J98S09D C2008 09 04.25162 23 47 16.33 +06 45 53.1 17.6 ER024704
J98S09D C2008 09 04.26492 23 46 47.09 +06 41 45.6 17.8 ER024704
J98S09D C2008 09 04.27818 23 46 17.86 +06 37 39.0 17.8 ER024704
J98S09D C2008 09 04.29151 23 45 48.49 +06 33 30.7 17.8 ER024704
J98S09D C2008 09 04.30471 23 45 19.42 +06 29 24.8 18.1 ER024704
J98S09D C2008 09 04.90038 23 24 56.90 +03 25 27.3 17.1 C ER024B40
J98S09D C2008 09 04.90122 23 24 55.12 +03 25 11.6 17.3 C ER024B40
J98S09D C2008 09 04.90324 23 24 50.87 +03 24 34.2 16.9 C ER024B40
J98S09D C2008 09 04.90713 23 24 42.73 +03 23 24.4 17.0 C ER024B40
J98S09D C2008 09 04.91026 23 24 36.22 +03 22 27.4 17.4 C ER024B40
Observer details:
704 Lincoln Laboratory ETS, New Mexico. Observers M. Bezpalko, D. Torres,
R. Kracke, G. Spitz, J. Kistler. Measurers J. Stuart, S. Scruggs. 1.0-m
f/2.15 reflector + CCD.
B40 Skylive Observatory, Catania. Observer F. Tozzi. 0.41-m f/10
Schmidt-Cassegrain + CCD + f/5.6 focal reducer.
First and last observations above in comparison with prediction:
Residuals in seconds of arc (or two decimals in degrees), reference and Delta-T
080830 704 7.02+ 4.07- 080904 B4022.44+ 7.28+ MPC 32779 -1.0 day
Orbital elements:
1998 SD9 Earth MOID = 0.0096 AU
Epoch 2008 Nov. 30.0 TT = JDT 2454800.5 MPC
M 297.11773 (2000.0) P Q
n 1.67333014 Peri. 6.33106 -0.99315391 -0.11625008
a 0.7026650 Node 166.97650 +0.10482063 -0.93017977
e 0.5045449 Incl. 2.91395 +0.05155535 -0.34821187
P 0.59 H 24.0 G 0.15 U 4
Residuals in seconds of arc
980918 704 1.2+ 1.7+ 980921 704 0.5+ 0.2+ 080830 704 0.5+ 0.7-
980918 704 0.2- 0.2+ 980921 704 1.6+ 1.6- 080830 704 0.5+ 0.5-
980918 704 1.4+ 1.0- 980921 704 (3.2+ 2.5+) 080830 704 0.1- 0.1+
980918 704 1.3- 1.3+ 980921 954 0.3+ 0.6- 080830 704 0.9- 0.3+
980919 673 (2.4- 0.0 ) 980921 954 0.3+ 0.6- 080904 704 0.4- 0.4+
980919 673 1.4- 0.5+ 980921 954 0.1- 0.0 080904 704 0.1+ 0.3+
980919 673 1.0- 0.6- 980921 954 0.4+ 0.5- 080904 704 0.3- 0.5+
980919 673 0.1- 0.2- 980921 954 0.5+ 0.6- 080904 704 0.3- 0.5+
980919 422 1.2- 0.3+ 980922 422 0.9+ 0.5+ 080904 704 0.0 0.6+
980919 422 0.5- 0.3+ 980922 422 (2.4- 1.1-) 080904 B40 0.5+ 0.0
980919 422 0.3+ 1.3+ 980922 422 0.6- 0.2- 080904 B40 0.2+ 0.4-
980919 422 0.3- 0.1+ 980922 422 0.5- 0.0 080904 B40 0.2- 1.1-
980919 422 1.1- 0.6- 980922 422 1.0- 0.2+ 080904 B40 0.2- 0.1-
980921 704 1.5+ 0.3- 080830 704 0.4+ 0.0 080904 B40 0.4+ 0.2-
Ephemeris:
1998 SD9 a,e,i = 0.70, 0.50, 3 q = 0.3481
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2008 09 01 01 43.04 +21 28.6 0.0347 1.030 126.5 52.0 18.7
2008 09 02 01 08.62 +17 43.5 0.0327 1.033 136.3 42.4 18.3
2008 09 03 00 32.38 +13 10.4 0.0316 1.035 147.0 32.0 17.9
2008 09 04 23 56.09 +08 06.5 0.0315 1.038 158.0 21.4 17.6
2008 09 05 23 21.54 +02 58.1 0.0324 1.040 168.4 11.3 17.3
2008 09 06 22 50.06 -01 49.6 0.0342 1.042 174.8 5.0 17.2
2008 09 07 22 22.31 -06 00.7 0.0368 1.044 169.8 9.8 17.6
2008 09 08 21 58.40 -09 30.5 0.0401 1.046 162.6 16.8 18.0
2008 09 09 21 38.04 -12 21.5 0.0439 1.047 156.1 22.9 18.4
2008 09 10 21 20.80 -14 39.5 0.0481 1.049 150.5 28.2 18.8
2008 09 11 21 06.20 -16 30.7 0.0525 1.050 145.6 32.8 19.1
2008 09 12 20 53.81 -18 00.8 0.0572 1.052 141.4 36.7 19.4
2008 09 13 20 43.25 -19 14.4 0.0621 1.053 137.6 40.1 19.7
2008 09 14 20 34.21 -20 14.9 0.0671 1.054 134.3 43.0 19.9
2008 09 15 20 26.43 -21 05.3 0.0722 1.055 131.4 45.7 20.1
2008 09 16 20 19.70 -21 47.6 0.0774 1.055 128.7 48.0 20.4
2008 09 17 20 13.85 -22 23.4 0.0827 1.056 126.3 50.1 20.6
2008 09 18 20 08.75 -22 53.9 0.0880 1.057 124.0 52.0 20.8
2008 09 19 20 04.28 -23 20.2 0.0933 1.057 122.0 53.7 20.9
2008 09 20 20 00.36 -23 42.9 0.0987 1.057 120.0 55.3 21.1
2008 09 21 19 56.90 -24 02.7 0.104 1.057 118.2 56.8 21.3
2008 09 22 19 53.85 -24 20.1 0.109 1.057 116.5 58.2 21.4
2008 09 23 19 51.16 -24 35.4 0.115 1.057 114.9 59.5 21.6
2008 09 24 19 48.77 -24 48.9 0.120 1.057 113.3 60.7 21.7
2008 09 25 19 46.66 -25 01.0 0.126 1.056 111.8 61.8 21.8
2008 09 26 19 44.80 -25 11.7 0.131 1.056 110.4 62.9 21.9
2008 09 27 19 43.15 -25 21.3 0.137 1.055 109.0 63.9 22.1
2008 09 28 19 41.69 -25 29.9 0.142 1.054 107.7 64.9 22.2
2008 09 29 19 40.41 -25 37.6 0.147 1.053 106.4 65.9 22.3
2008 09 30 19 39.28 -25 44.6 0.153 1.052 105.2 66.8 22.4
2008 10 01 19 38.29 -25 50.9 0.158 1.051 103.9 67.7 22.5
Gareth V. Williams (C) Copyright 2008 MPC M.P.E.C. 2008-R24
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