MPEC 2004-O20 : 2001 YF1
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M.P.E.C. 2004-O20 Issued 2004 July 20, 02:44 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 Brinson Foundation
Prepared using the Tamkin Foundation Computer Network
MPC@CFA.HARVARD.EDU
URL http://cfa-www.harvard.edu/iau/mpc.html ISSN 1523-6714
2001 YF1
Revision to MPEC 2001-Y23
Additional Observations:
K01Y01F C2004 07 16.98071 23 13 01.41 +23 36 41.9 EO020246
K01Y01F C2004 07 16.98285 23 13 01.35 +23 36 45.4 EO020246
K01Y01F C2004 07 16.98387 23 13 01.29 +23 36 46.1 EO020246
K01Y01F C2004 07 16.98523 23 13 01.32 +23 36 48.3 EO020246
K01Y01F C2004 07 16.98663 23 13 01.16 +23 36 50.4 EO020246
K01Y01F C2004 07 20.01237 23 10 29.91 +24 44 41.1 EO020246
K01Y01F C2004 07 20.01330 23 10 29.78 +24 44 44.0 EO020246
K01Y01F C2004 07 20.01610 23 10 29.72 +24 44 47.3 EO020246
K01Y01F C2004 07 20.01806 23 10 29.53 +24 44 48.5 EO020246
Observer details:
246 Klet Observatory-KLENOT. Observers J. Ticha, M. Tichy, M. Kocer. 1.06-m
KLENOT Telescope + CCD.
First and last observations above in comparison with prediction:
Residuals in seconds of arc, reference and Delta-T
040716 246 10.8- 3.3- 040720 246 10.8- 4.0- MPO 57848 +0.0046 day
Orbital elements:
2001 YF1
Epoch 2004 July 14.0 TT = JDT 2453200.5 MPC
M 72.63406 (2000.0) P Q
n 0.54396751 Peri. 289.75897 -0.81580431 +0.46967236
a 1.4862347 Node 279.56843 -0.31260799 -0.84902425
e 0.3395115 Incl. 20.01151 -0.48655891 -0.24200352
P 1.81 H 19.5 G 0.15 U 2
Residuals in seconds of arc
011217 704 2.3- 0.5- 020102 649 0.1+ 0.5+ 020501 413 0.2+ 0.2-
011217 704 2.2- 0.8- 020104 104 2.7+ 0.5+ 020707 651 1.0- 0.7+
011217 704 2.0- 0.5- 020104 104 0.2+ 0.9- 020707 651 0.3+ 0.1+
011218 704 0.1+ 0.1+ 020104 104 0.7+ 0.4+ 020707 651 1.3+ 0.7+
011218 704 0.2- 1.3+ 020104 104 1.3- 1.0+ 020730 413 0.6+ 0.8+
011218 704 0.4- 0.3+ 020109 012 0.1+ 0.0 020730 413 0.2- 0.2+
011218 704 0.5- 0.6+ 020109 012 0.2- 0.3+ 020730 413 0.2- 0.3+
011218 704 0.2- 0.5+ 020109 012 (3.2+ 1.0+) 020730 413 0.5- 0.2+
011218 649 0.8- 0.1- 020109 012 0.1- 0.2+ 020730 413 0.7- 0.0
011218 649 0.4+ 0.0 020109 012 0.7- 0.2+ 020731 413 0.0 0.1-
011218 649 0.0 0.0 020109 012 0.5+ 1.2+ 020731 413 0.2- 0.3+
011219 704 0.4+ 0.4- 020121 715 0.2- 0.3+ 020823 644 0.1+ 0.3+
011219 704 0.4+ 0.2- 020121 715 0.0 0.2- 040716 246 0.7- 0.1-
011219 704 0.3+ 0.3+ 020121 715 0.4- 0.1+ 040716 246 0.2- 0.4+
011219 704 0.3+ 0.1- 020129 413 0.1+ 0.6- 040716 246 0.3- 0.3-
011219 704 0.2+ 0.0 020129 413 0.5+ 0.0 040716 246 1.0+ 0.0
011223 587 0.8+ 0.2- 020306 413 0.2+ 0.6- 040716 246 0.3- 0.2+
011223 587 0.0 0.1+ 020306 413 0.3- 0.2- 040720 246 0.4+ 0.7-
011224 649 0.1+ 0.2+ 020501 413 0.4+ 0.1+ 040720 246 0.6- 1.0+
011224 649 0.1+ 0.5+ 020501 413 0.1- 0.6- 040720 246 0.8+ 0.6+
011224 649 0.2- 0.0 020501 413 0.4+ 0.2- 040720 246 0.3- 0.8-
020102 649 0.1- 0.3+ 020501 413 0.3+ 0.0
020102 649 0.7+ 0.3- 020501 413 0.1+ 0.3+
Ephemeris:
2001 YF1 a,e,i = 1.49, 0.34, 20 q = 0.9816
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2004 07 14 23 15.01 +22 26.5 0.809 1.504 110.5 39.3 21.5
2004 07 24 23 06.41 +26 08.1 0.789 1.551 117.9 35.4 21.4
2004 08 03 22 52.51 +28 59.9 0.777 1.595 125.4 31.2 21.3
2004 08 13 22 34.27 +30 45.1 0.776 1.638 132.2 27.3 21.2
2004 08 23 22 13.92 +31 11.3 0.788 1.678 137.4 24.1 21.2
2004 09 02 21 54.57 +30 20.9 0.817 1.716 139.9 22.3 21.3
2004 09 12 21 38.87 +28 30.8 0.863 1.752 139.1 22.1 21.5
2004 09 22 21 28.37 +26 05.6 0.925 1.785 135.5 23.2 21.7
2004 10 02 21 23.36 +23 30.0 1.003 1.816 130.0 24.9 22.0
Gareth V. Williams (C) Copyright 2004 MPC M.P.E.C. 2004-O20
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