MPEC 2003-T17 : 1999 HX1
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M.P.E.C. 2003-T17 Issued 2003 Oct. 4, 01:54 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 Steven and Michele Kirsch Foundation
Prepared using the Tamkin Foundation Computer Network
MPC@CFA.HARVARD.EDU
URL http://cfa-www.harvard.edu/iau/mpc.html ISSN 1523-6714
1999 HX1
Revision to MPEC 1999-H23
Additional Observations:
J99H01X 2C2003 07 30.26836313 22 25.283+02 33 27.88 21.7 R 568
J99H01X 2C2003 07 30.27141413 22 25.907+02 33 24.11 21.7 R 568
J99H01X 2C2003 07 31.31965413 26 02.664+02 12 05.86 22.4 R 568
Observer details:
568 Mauna Kea. Observers D. J. Tholen, F. Bernardi. 2.2-m University of
Hawaii reflector + CCD.
First and last observations above in comparison with prediction:
Residuals in seconds of arc, reference and Delta-T
030730 568 84.7+ 4.0- 030731 568 85.7+ 4.4- MPC 35735 -0.040 day
Orbital elements:
1999 HX1
Epoch 2003 Dec. 27.0 TT = JDT 2453000.5 MPC
M 33.32013 (2000.0) P Q
n 0.24081828 Peri. 102.20119 +0.00828004 +0.99953344
a 2.5586433 Node 168.15471 -0.96410041 +0.01578308
e 0.5662672 Incl. 8.23448 -0.26540880 -0.02614946
P 4.09 H 19.9 G 0.15 U 1
Residuals in seconds of arc
990419 704 1.6- 0.3- 990423 046 0.3- 0.4+ 990611 704 0.0 0.2+
990419 704 1.4- 1.1+ 990423 046 0.1+ 0.7+ 990611 704 0.0 0.4+
990419 704 (1.2+ 2.1+) 990424 658 0.3- 0.3+ 990611 704 0.4- 0.1+
990419 704 (2.6+ 0.5+) 990424 658 0.1- 0.3+ 990611 704 0.3- 0.2+
990420 557 0.1- 0.1+ 990424 658 0.5- 0.4+ 990611 704 0.6- 0.2+
990420 557 0.3+ 0.6+ 990505 658 0.1- 0.2- 990702 046 0.5+ 0.0
990420 557 0.5+ 0.2+ 990505 658 0.2- 0.5- 990702 046 0.1+ 0.2-
990420 046 1.2- 0.5+ 990505 658 0.2- 0.2+ 990702 046 0.2+ 0.3+
990420 046 0.7- 0.7+ 990512 360 0.0 0.1+ 990702 046 0.0 0.4-
990420 046 0.3- 0.1+ 990512 360 0.3+ 0.0 990702 587 1.0+ 1.1+
990422 859 0.5+ 0.7- 990512 360 0.1- 0.3- 990702 587 0.0 0.4+
990422 859 0.5+ 0.4- 990514 704 0.7+ 0.6+ 990703 046 0.1- 0.2+
990422 859 0.7+ 0.4- 990514 704 0.9+ 0.6+ 990703 046 0.6+ 0.5+
990422 658 0.5- 0.3- 990514 704 0.9+ 0.7+ 990703 046 0.4+ 0.5+
990422 658 0.6- 0.3- 990514 704 1.4+ 0.6+ 990703 046 0.3+ 0.3+
990422 658 0.5- 0.1- 990520 118 0.6+ 1.4+ 990709 402 0.6+ 0.2+
990422 426 1.0+ 0.6- 990520 118 0.2- 0.3- 990709 402 0.0 0.7-
990422 426 0.2+ 0.4- 990523 118 1.4+ 0.2+ 990709 402 0.0 0.4-
990422 426 0.5+ 0.3- 990523 118 1.3+ 0.7+ 990714 587 0.5- 1.2-
990423 557 0.1- 0.3+ 990604 704 0.1- 0.5+ 990714 587 0.1- 0.8-
990423 557 0.0 0.0 990604 704 0.2+ 0.5- 990716 118 0.3+ 0.6+
990423 557 0.1- 0.6- 990604 704 0.7- 0.4+ 990716 118 0.1+ 0.0
990423 046 0.2+ 0.0 990604 704 0.6- 0.2+ 990722 704 0.1- 0.5+
990423 046 0.0 0.2- 990607 704 0.2- 0.5- 990722 704 1.5- 0.4-
990423 046 0.8+ 0.0 990607 704 1.1- 0.6- 990722 704 (0.0 2.5+)
990423 046 0.6+ 0.8- 990607 704 0.6- 1.0- 990722 704 0.2- 0.5+
990423 658 0.9- 0.0 990607 704 0.5- 1.4- 990803 413 0.2- 0.8+
990423 658 0.2- 0.5+ 990607 704 0.0 0.5- 990803 413 0.2+ 0.2+
990423 658 0.4- 0.3+ 990608 704 0.2- 1.1+ 990804 413 0.4- 0.5+
990423 426 0.1+ 0.4+ 990608 704 0.3- 0.2+ 990804 413 0.3- 0.2+
990423 426 0.3+ 0.6+ 990608 704 0.0 0.3- 990806 711 (0.6+ 3.2+)
990423 426 0.3- 0.5+ 990608 704 0.6- 0.2- 990806 711 1.5+ 0.4-
990423 557 0.1+ 1.6- 990608 704 0.5- 0.5- 990808 711 (1.2- 3.2+)
990423 557 0.1+ 0.8- 990610 704 1.1+ 0.4- 990808 711 0.1+ 0.3-
990423 557 0.3+ 0.2- 990610 704 0.2+ 0.7- 030730 568 0.0 0.2+
990423 046 0.8+ 0.2+ 990610 704 0.5- 0.4- 030730 568 0.0 0.2+
990423 046 0.6- 0.4+ 990610 704 0.1+ 1.3- 030731 568 0.0 0.2+
990423 046 0.2- 0.1+ 990610 704 0.2- 1.1-
Ephemeris:
1999 HX1 a,e,i = 2.56, 0.57, 8 q = 1.1098
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2003 09 28 17 40.03 -17 39.9 0.929 1.253 80.8 52.1 22.2
2003 10 08 18 26.51 -19 05.2 0.998 1.311 82.0 49.0 22.3
2003 10 18 19 10.33 -19 37.1 1.086 1.374 82.4 46.0 22.5
2003 10 28 19 50.72 -19 23.7 1.193 1.441 81.9 43.1 22.7
2003 11 07 20 27.49 -18 35.1 1.315 1.511 80.6 40.3 23.0
Gareth V. Williams (C) Copyright 2003 MPC M.P.E.C. 2003-T17
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