MPEC 2007-H12 : 2001 YK4
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M.P.E.C. 2007-H12 Issued 2007 Apr. 17, 22:59 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
2001 YK4
Revision to MPEC 2001-Y48
Additional Observations:
K01Y04K 2C2005 05 04.50703113 59 14.972-06 19 29.98 22.8 R EH012568
K01Y04K 2C2007 03 09.39074611 01 54.792+07 01 57.91 23.1 R EH012568
Observer details:
568 Mauna Kea. Observers D. J. Tholen, F. Bernardi. 2.24-m University of
Hawaii reflector + 2048 CCD, 8.2-m reflector.
First and last observations above in comparison with prediction:
Residuals in seconds of arc (or two decimals in degrees), reference and Delta-T
050504 568 0.03+ 0.01- 070309 568 97.4+ 32.9- MPO 30592 -0.28 day
Orbital elements:
2001 YK4 Earth MOID = 0.0713 AU
Epoch 2007 Apr. 10.0 TT = JDT 2454200.5 MPC
M 95.34883 (2000.0) P Q
n 0.22907385 Peri. 207.88932 +0.99408118 -0.10437125
a 2.6453656 Node 158.03962 +0.10847832 +0.93847393
e 0.7797216 Incl. 4.62493 +0.00592167 +0.32920104
P 4.30 H 18.4 G 0.15 U 1
Residuals in seconds of arc
011223 699 0.1+ 0.5+ 011226 966 0.6- 0.8+ 020122 649 0.1- 0.3+
011223 699 0.2+ 0.5+ 020103 649 0.3+ 0.3+ 020122 649 0.5+ 0.3+
011223 699 0.4- 0.5+ 020103 649 0.0 0.3+ 020122 649 0.2+ 0.3-
011223 699 0.0 0.4+ 020103 649 0.3- 0.4+ 020122 649 0.4+ 0.3-
011224 046 1.6+ 0.1+ 020103 649 0.3+ 0.1- 020203 113 0.5- 1.8-
011224 046 0.1- 0.7- 020103 413 0.1+ 0.2- 020203 113 0.8- 1.6-
011224 046 0.8- 0.7- 020103 413 0.3- 0.1- 020203 113 0.9- 1.0-
011224 046 0.5- 0.6- 020103 413 0.2+ 0.1+ 020203 113 0.1+ 1.7-
011224 118 0.1+ 0.4- 020108 644 0.2+ 0.0 020203 113 0.2+ 1.4-
011224 118 0.4+ 0.9- 020108 644 0.1- 0.1- 020209 413 0.2+ 0.2+
011224 118 0.6+ 0.1- 020108 644 0.1+ 0.0 020209 413 0.3+ 0.5+
011224 118 0.5+ 0.7- 020113 711 0.4- 0.8+ 020211 704 0.3+ 0.2+
011224 918 0.2- 1.0- 020113 711 1.3- 0.7+ 020211 704 0.1+ 0.5+
011224 918 0.1- 0.2- 020113 711 1.4- 0.3+ 020211 704 (2.1+ 2.1+)
011224 649 0.4+ 0.3- 020114 699 0.2- 0.3- 020211 704 1.5+ 1.6+
011224 918 1.0+ 1.1- 020114 704 0.3+ 1.2+ 020219 413 0.6+ 0.5-
011224 649 0.1- 0.1- 020114 699 0.0 0.6+ 020219 413 0.3+ 0.2-
011224 649 0.1- 0.0 020114 704 1.1+ 1.3+ 020219 413 0.2+ 0.1+
011225 608 0.7- 0.2- 020114 699 0.4+ 0.3+ 020309 696 0.3+ 0.2-
011225 608 0.9- 0.3+ 020114 704 0.6+ 1.3+ 020309 696 0.2+ 0.1+
011225 608 0.7- 0.0 020114 699 0.6+ 0.4- 050504 568 0.0 0.1+
011226 966 0.7- 0.5+ 020114 704 0.3+ 1.4+ 070309 568 0.0 0.1-
011226 966 0.6- 0.4+ 020114 704 0.1- 1.0+
Ephemeris:
2001 YK4 a,e,i = 2.65, 0.78, 5 q = 0.5827
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2007 04 10 10 37.59 +09 39.8 3.165 3.963 137.7 9.8 24.5
2007 04 20 10 33.21 +10 07.4 3.322 4.005 126.7 11.6 24.7
2007 04 30 10 30.66 +10 23.5 3.497 4.045 116.3 12.9 24.9
2007 05 10 10 29.86 +10 29.1 3.683 4.084 106.4 13.7 25.1
Gareth V. Williams (C) Copyright 2007 MPC M.P.E.C. 2007-H12
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