MPEC 2009-W48 : 1998 HJ3
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M.P.E.C. 2009-W48 Issued 2009 Nov. 20, 12:55 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 HJ3
Revision to MPEC 1998-H18
Additional Observations:
J98H03J C2009 11 19.36566 07 08 13.24 +10 04 15.5 18.0 EW048704
J98H03J C2009 11 19.39025 07 07 58.53 +10 04 24.7 18.1 EW048704
J98H03J C2009 11 19.40255 07 07 51.14 +10 04 28.4 18.1 EW048704
J98H03J C2009 11 19.41488 07 07 43.72 +10 04 33.1 18.6 EW048704
J98H03J C2009 11 20.15870 07 00 34.07 +10 08 14.8 17.2 R EW048118
J98H03J C2009 11 20.15936 07 00 33.70 +10 08 14.8 17.2 R EW048118
J98H03J C2009 11 20.16002 07 00 33.30 +10 08 15.0 17.0 R EW048118
J98H03J C2009 11 20.16068 07 00 32.94 +10 08 15.2 17.2 R EW048118
J98H03J C2009 11 20.16266 07 00 31.80 +10 08 15.7 16.9 R EW048118
J98H03J C2009 11 20.28006 06 59 28.01 +10 08 56.3 17.2 R EW048H01
J98H03J C2009 11 20.28560 06 59 24.84 +10 08 58.0 17.2 R EW048H01
J98H03J C2009 11 20.29273 06 59 20.77 +10 09 00.2 17.2 R EW048H01
J98H03J C2009 11 20.29792 06 59 17.16 +10 09 01.6 17.7 R EW048850
J98H03J C2009 11 20.29797 06 59 17.77 +10 09 01.8 17.1 R EW048H01
J98H03J C2009 11 20.30776 06 59 11.51 +10 09 03.9 17.4 R EW048850
J98H03J C2009 11 20.31735 06 59 05.93 +10 09 07.9 17.4 R EW048850
J98H03J C2009 11 20.33621 06 58 55.12 +10 09 13.4 17.6 R EW048850
J98H03J C2009 11 20.34566 06 58 49.65 +10 09 16.6 17.4 R EW048850
J98H03J C2009 11 20.35472 06 58 45.39 +10 09 19.6 17.5 R EW048854
J98H03J C2009 11 20.35778 06 58 43.66 +10 09 20.8 17.4 R EW048854
J98H03J C2009 11 20.36084 06 58 41.91 +10 09 21.5 17.5 R EW048854
J98H03J C2009 11 20.42593 06 58 04.57 +10 09 41.1 17.5 R EW048926
J98H03J C2009 11 20.42700 06 58 03.95 +10 09 41.2 17.6 R EW048926
J98H03J C2009 11 20.42808 06 58 03.33 +10 09 41.6 17.6 R EW048926
J98H03J C2009 11 20.51253 06 57 14.91 +10 10 02.6 17.2 R EW048H10
J98H03J C2009 11 20.51446 06 57 13.86 +10 10 01.6 16.7 R EW048H10
Observer details:
118 Modra. Observers S. Gajdos, J. Vilagi. 0.6-m f/5.5 reflector + CCD.
704 Lincoln Laboratory ETS, New Mexico. Observers M. Bezpalko, D. Torres,
R. Kracke, G. Spitz, M. Blythe. Measurer J. Stuart. 1.0-m f/2.15
reflector + CCD.
850 Cordell-Lorenz Observatory, Sewanee. Observers D. T. Durig, S. D. Harris,
E. K. Kegan, J. C. Cochran. 0.30-m f/2.5 Schmidt-Cassegrain
+ 765x510 CCD.
854 Sabino Canyon Observatory, Tucson. Observer J. E. McGaha. 0.36-m f/10.0
Schmidt-Cassegrain + CCD.
926 Tenagra II Observatory. Observers P. R. Holvorcem, M. Schwartz. Measurer
P. R. Holvorcem. 0.81-m f/7 Ritchey-Chretien + CCD.
H01 Magdalena Ridge Observatory, Socorro. Observer W. H. Ryan. 2.4-m f/8.9
reflector + CCD.
H10 Tzec Maun Observatory, Mayhill. Observer E. Schwab. 0.36-m f/3.8
Maksutov-Newtonian + CCD.
First and last observations above in comparison with prediction:
Residuals in seconds of arc (or two decimals in degrees), reference and Delta-T
091119 704 2.85- 1.98- 091120 H10 3.94- 1.88- MPO 57669 +7.3 day
Orbital elements:
1998 HJ3 PHA, Earth MOID = 0.0116 AU
Epoch 2010 Jan. 4.0 TT = JDT 2455200.5 MPC
M 36.21288 (2000.0) P Q
n 0.35205966 Peri. 93.75844 +0.73596003 +0.67236025
a 1.9863626 Node 224.01512 -0.65761998 +0.68208479
e 0.7459949 Incl. 6.55636 -0.16093102 +0.28756224
P 2.80 H 18.8 G 0.15 U 2
Residuals in seconds of arc
980419 704 0.5- 1.1- 980422 704 1.8- 0.4- 091119 704 0.3- 0.7+
980419 704 0.2- 1.4+ 980422 704 1.2+ 0.3- 091119 704 0.4+ 1.4+
980419 704 (2.8+ 2.0-) 980422 704 (2.2- 0.6-) 091119 704 0.3+ 0.9+
980419 704 0.0 0.6+ 980422 046 0.6+ 0.2- 091119 704 0.0 1.4+
980419 704 0.6+ 1.3+ 980422 046 1.6+ 0.5- 091120 118 0.2+ 0.0
980420 402 0.8- 0.9+ 980422 046 (2.2+ 0.8-) 091120 118 0.3+ 0.1-
980420 402 0.6+ 1.3- 980422 046 0.5+ 0.9+ 091120 118 0.0 0.1-
980420 402 0.4- 0.0 980422 046 1.0+ 0.2- 091120 118 0.3+ 0.1-
980420 557 0.6- 0.2- 980422 557 0.1+ 1.1+ 091120 118 0.3+ 0.2-
980420 557 0.2- 0.7- 980422 557 0.1+ 0.3- 091120 H01 0.3- 0.0
980420 046 0.4- 0.6+ 980422 118 0.5- 0.2- 091120 H01 0.3- 0.0
980420 046 0.5- 0.4+ 980422 118 1.6+ 0.5- 091120 H01 0.2- 0.0
980420 046 0.1- 0.6+ 980422 118 0.0 0.0 091120 850 0.2+ 0.7-
980421 704 0.3- 1.2- 980423 557 0.9- 0.3- 091120 H01 0.2- 0.1-
980421 704 0.2+ 1.1+ 980423 557 0.5+ 0.5- 091120 850 0.3+ 1.3-
980421 704 0.7+ 0.7- 980423 557 0.3+ 1.0- 091120 850 0.7- 0.1-
980421 704 (0.5- 2.1+) 980423 046 0.6+ 0.1- 091120 850 0.2- 0.1-
980421 704 1.2- 0.2- 980423 046 0.3+ 1.0+ 091120 850 0.7- 0.4+
980421 704 1.2+ 0.2- 980423 046 0.3+ 0.2+ 091120 854 0.2- 0.3-
980421 704 0.6- 0.7+ 980423 118 0.6- 0.0 091120 854 0.2+ 0.0
980421 704 (2.9+ 2.7+) 980423 118 0.5+ 0.6- 091120 854 0.2+ 0.2-
980421 704 0.1- 1.6+ 980425 118 0.3+ 0.4- 091120 926 0.1+ 0.2+
980421 046 0.3- 0.5+ 980425 118 0.3+ 0.5- 091120 926 0.0 0.0
980421 046 0.0 0.2+ 980425 118 0.0 0.1+ 091120 926 0.1- 0.1+
980421 046 0.6- 0.5- 980501 557 0.6- 0.1- 091120 H10 0.0 0.2-
980421 046 0.7- 0.5- 980501 557 0.6- 0.3+ 091120 H10 0.7+ 1.7-
980422 704 0.6- 0.3- 980501 557 0.3- 0.2-
Ephemeris:
1998 HJ3 a,e,i = 1.99, 0.75, 7 q = 0.5045
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2009 11 15 07 55.06 +09 28.6 0.202 1.085 113.2 56.9 17.6
2009 11 25 06 19.92 +10 23.8 0.265 1.215 145.4 27.4 17.6
2009 12 05 05 22.98 +10 34.3 0.362 1.339 165.2 10.8 17.9
2009 12 15 04 50.75 +10 49.9 0.485 1.458 164.5 10.4 18.7
2009 12 25 04 33.40 +11 18.7 0.629 1.571 153.2 16.4 19.7
2010 01 04 04 25.40 +11 57.3 0.790 1.679 142.1 21.1 20.4
2010 01 14 04 23.52 +12 41.9 0.966 1.782 132.0 24.2 21.1
2010 01 24 04 25.90 +13 29.3 1.155 1.880 122.8 26.1 21.7
Timothy B. Spahr (C) Copyright 2009 MPC M.P.E.C. 2009-W48
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