MPEC 2000-S22 : 1998 YQ11
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M.P.E.C. 2000-S22 Issued 2000 Sept. 21, 11:19 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
1998 YQ11
Revision to MPEC 1998-Y38
Observations:
J98Y11Q 1C2000 09 19.59698 22 29 46.93 +11 57 01.9 413
J98Y11Q 1C2000 09 19.59925 22 29 46.80 +11 57 00.9 413
J98Y11Q 1C2000 09 20.58102 22 28 41.88 +11 48 01.9 413
J98Y11Q 1C2000 09 20.58363 22 28 41.70 +11 48 00.6 413
J98Y11Q 1C2000 09 20.58624 22 28 41.53 +11 47 59.1 20.6 R 413
J98Y11Q 1C2000 09 20.58886 22 28 41.35 +11 47 57.4 20.0 R 413
J98Y11Q 1C2000 09 20.59148 22 28 41.17 +11 47 56.2 20.9 R 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
000919 413 10.1- 5.2- 000920 413 9.9- 4.9- MPC 35079 +0.014 day
Orbital elements:
1998 YQ11
Epoch 2000 Sept. 13.0 TT = JDT 2451800.5 Spahr
M 232.13018 (2000.0) P Q
n 0.38435744 Peri. 245.45450 -0.77199744 -0.60284244
a 1.8734662 Node 256.84038 +0.63189141 -0.69356751
e 0.3962837 Incl. 11.94255 +0.06879822 -0.39439207
P 2.56 H 18.0 G 0.15 U 2
Residuals in seconds of arc
981223 704 0.4+ 0.1+ 981228 402 0.0 0.2- 990318 428 0.6+ 1.0+
981223 704 0.3+ 1.6- 990110 428 1.8- 1.2+ 990318 428 0.0 0.5+
981223 704 0.4+ 0.6+ 990110 428 2.0- 1.3+ 990318 428 0.1- 0.4+
981223 704 (0.4+ 3.1+) 990113 428 1.3+ 0.7+ 990417 426 0.6+ 0.5+
981223 704 0.1- 0.5- 990113 428 0.9+ 0.5+ 990417 426 1.1+ 0.3+
981224 046 1.3+ 0.0 990115 426 0.1+ 0.3- 990417 426 1.7+ 0.3-
981224 046 0.0 0.7- 990115 426 0.1- 0.0 990417 426 0.6+ 0.5-
981224 046 0.3+ 0.2- 990115 426 0.1+ 0.1- 990508 428 1.4- 0.4-
981224 046 0.4+ 0.6- 990118 859 1.2+ 0.7- 990508 428 1.2- 0.1+
981224 557 0.2- 0.1- 990118 859 0.9+ 0.9- 990513 360 0.5- 0.0
981224 557 0.4- 0.0 990118 859 0.0 0.0 990513 360 0.5- 0.1+
981224 557 1.1- 0.9+ 990119 428 0.3- 0.1- 990513 360 0.2- 0.0
981225 422 0.5- 0.3+ 990119 428 0.3- 0.1+ 990612 428 0.3- 0.3+
981225 422 0.4+ 0.0 990210 426 0.3- 0.4+ 990612 428 0.4+ 0.4+
981225 422 0.1- 0.3+ 990210 426 0.3- 0.3+ 000919 413 0.3- 0.0
981225 422 0.0 0.1+ 990210 426 0.5- 0.2+ 000919 413 0.0 0.3+
981227 402 0.7- 0.0 990212 428 0.7- 0.0 000920 413 0.1- 0.2+
981227 402 0.5- 0.6- 990212 428 0.3- 0.5- 000920 413 0.2- 0.4+
981227 402 0.2- 0.6- 990212 428 0.0 0.8+ 000920 413 0.1- 0.3+
981227 402 0.2- 0.5- 990212 428 0.8+ 0.7- 000920 413 0.1- 0.1+
981228 402 0.2+ 0.1- 990216 422 0.2+ 0.9- 000920 413 0.2- 0.4+
981228 402 0.1+ 0.1+ 990216 422 0.8- 0.6-
981228 402 0.2+ 0.1+ 990216 422 0.5+ 0.4-
Ephemeris:
1998 YQ11 a,e,i = 1.87, 0.40, 12 q = 1.1310
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2000 09 13 22 37.41 +12 53.2 1.490 2.458 159.6 8.2 21.4
2000 09 23 22 26.11 +11 25.3 1.492 2.433 153.9 10.5 21.5
2000 10 03 22 16.82 +09 46.6 1.520 2.407 144.7 13.9 21.6
2000 10 13 22 10.41 +08 08.0 1.570 2.379 134.6 17.4 21.8
2000 10 23 22 07.25 +06 38.4 1.638 2.350 124.6 20.4 21.9
2000 11 02 22 07.37 +05 23.8 1.719 2.318 114.9 22.8 22.1
2000 11 12 22 10.59 +04 27.7 1.808 2.285 105.8 24.6 22.2
Timothy B. Spahr (C) Copyright 2000 MPC M.P.E.C. 2000-S22
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