MPEC 2001-G22 : 1998 HJ41
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M.P.E.C. 2001-G22 Issued 2001 Apr. 11, 17:32 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 HJ41
Revision to MPEC 1998-J04
Observations:
J98H41J 1C2001 03 13.62436 09 26 04.82 -52 13 07.1 20.4 R 413
J98H41J 1C2001 04 05.47020 09 24 29.22 -36 03 51.6 413
J98H41J 1C2001 04 05.47178 09 24 29.25 -36 03 47.3 413
J98H41J 1C2001 04 05.47446 09 24 29.42 -36 03 38.7 413
J98H41J 1C2001 04 06.46561 09 25 09.04 -35 13 53.3 413
J98H41J 1C2001 04 06.46766 09 25 09.21 -35 13 46.8 413
J98H41J 1C2001 04 06.46971 09 25 09.24 -35 13 41.3 413
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
010313 413 55.3- 15.0+ 010406 413 53.8- 10.8+ MPC 33078 +0.016 day
Orbital elements:
1998 HJ41
Epoch 2001 Apr. 1.0 TT = JDT 2452000.5 Spahr
M 210.10781 (2000.0) P Q
n 0.61913838 Peri. 120.06329 +0.78148282 +0.52833271
a 1.3633611 Node 211.92444 -0.49770549 +0.84866187
e 0.1248973 Incl. 38.87496 +0.37626300 +0.02525025
P 1.59 H 18.3 G 0.15 U 3
Residuals in seconds of arc
980428 704 2.4+ 2.1- 980508 104 1.0+ 1.1+ 980607 658 0.2- 0.4-
980428 704 0.2+ 1.6- 980511 118 0.6- 0.7+ 980607 658 0.1- 0.0
980428 704 0.9+ 1.4- 980511 118 0.3+ 0.8+ 980607 658 0.4- 0.6-
980428 704 1.0+ 0.0 980516 046 0.7+ 0.1- 980614 658 0.3+ 0.1-
980428 704 0.8+ 0.5- 980516 046 0.5- 1.7+ 980614 658 0.7- 0.1-
980430 046 0.8- 1.0- 980516 046 0.1- 0.7+ 980614 658 0.7- 0.3+
980430 046 0.0 0.2+ 980516 046 0.9+ 0.1+ 980614 046 0.3+ 0.8+
980430 046 0.5+ 1.0- 980516 046 0.4+ 1.5+ 980614 557 0.6- 0.5+
980430 557 0.4- 0.7+ 980520 118 0.3+ 0.0 980614 557 0.3- 0.7+
980430 557 0.1- 0.3- 980520 118 0.1+ 0.3+ 980628 711 0.3- 0.6+
980430 557 0.6- 0.1- 980521 360 0.1- 0.5+ 980628 711 0.3- 0.8+
980501 046 0.4- 0.2- 980521 360 0.2+ 0.2+ 980629 711 0.9- 0.1+
980501 046 0.1- 0.1- 980521 360 0.1- 0.3+ 980629 711 0.4- 0.6+
980501 557 0.4- 0.8+ 980522 587 0.6- 0.6+ 980719 557 0.5- 0.7+
980501 557 0.2- 0.0 980522 587 1.4- 0.5- 980719 557 0.1- 0.9-
980501 557 0.8- 0.1+ 980522 587 1.7- 1.1- 980719 557 0.2- 1.1-
980501 557 0.3+ 0.5+ 980525 118 0.5+ 0.6- 980719 557 0.0 0.5+
980501 046 0.9- 1.2+ 980525 118 0.5+ 0.6- 980828 658 0.0 0.8+
980501 046 0.7- 0.9+ 980525 118 0.7+ 0.8- 980828 658 0.3+ 0.3-
980501 046 0.3- 0.1+ 980526 557 0.1- 0.1+ 980828 658 0.4+ 0.2+
980501 046 0.5- 0.5+ 980526 557 0.7+ 0.1+ 980922 658 0.1+ 1.3-
980503 360 0.2- 0.1- 980526 557 0.3- 0.6- 980922 658 1.4- 0.3+
980503 360 0.2+ 0.5- 980529 118 1.4- 0.4+ 980922 658 0.3- 1.8-
980503 360 0.1- 0.2- 980529 118 0.6- 0.4+ 980923 658 0.7- 0.2-
980504 402 0.0 0.4- 980529 118 1.0- 0.2- 980923 658 1.5- 0.1+
980504 402 0.1- 0.3- 980531 557 0.3- 0.7- 981019 658 2.5+ 1.7-
980504 402 0.2+ 0.9+ 980531 557 0.3- 0.4- 981019 658 0.4+ 0.2+
980507 046 0.4+ 0.0 980601 557 0.1+ 1.0- 010313 413 0.1+ 0.7+
980507 046 0.5+ 0.2- 980602 557 0.5- 0.3+ 010405 413 0.1- 0.2-
980507 046 0.5+ 0.1+ 980602 557 0.6+ 0.0 010405 413 0.4- 0.6-
980507 104 1.5+ 0.9+ 980602 046 0.7+ 0.2+ 010405 413 0.6+ 0.1-
980507 104 0.7+ 0.7- 980602 046 0.2+ 0.6- 010406 413 0.7- 0.2+
980507 104 0.7+ 0.5+ 980602 046 0.6- 0.2- 010406 413 0.5+ 0.5+
980507 104 0.4+ 0.0 980606 658 0.2- 0.1- 010406 413 0.1- 0.3-
980507 104 0.1+ 0.1- 980606 658 0.2+ 0.1+
980508 104 0.6+ 0.8- 980606 658 0.5- 0.0
Ephemeris:
1998 HJ41 a,e,i = 1.36, 0.12, 39 q = 1.1931
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2001 04 01 09 22.18 -39 43.2 0.718 1.515 123.0 33.6 19.9
2001 04 11 09 28.82 -31 23.0 0.713 1.507 122.0 34.3 19.9
2001 04 21 09 40.13 -22 52.2 0.729 1.497 118.6 36.1 20.0
2001 05 01 09 55.00 -14 54.6 0.766 1.486 113.2 38.5 20.1
2001 05 11 10 12.42 -08 00.3 0.820 1.474 106.8 41.0 20.3
2001 05 21 10 31.59 -02 20.7 0.888 1.461 100.3 43.0 20.5
2001 05 31 10 52.01 +02 06.0 0.964 1.446 93.9 44.4 20.7
2001 06 10 11 13.26 +05 28.3 1.045 1.430 87.9 45.2 20.9
2001 06 20 11 35.10 +07 57.0 1.126 1.414 82.4 45.4 21.0
2001 06 30 11 57.42 +09 42.2 1.205 1.396 77.4 45.3 21.2
2001 07 10 12 20.14 +10 52.6 1.278 1.379 72.8 44.8 21.2
2001 07 20 12 43.27 +11 35.2 1.346 1.360 68.7 44.1 21.3
2001 07 30 13 06.88 +11 55.4 1.404 1.342 65.1 43.3 21.3
2001 08 09 13 31.05 +11 58.0 1.454 1.323 61.9 42.5 21.4
Timothy B. Spahr (C) Copyright 2001 MPC M.P.E.C. 2001-G22
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