MPEC 1998-P02 : 1997 QJ4
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M.P.E.C. 1998-P02 Issued 1998 Aug. 1, 02:21 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.
BMARSDEN@CFA.HARVARD.EDU or GWILLIAMS@CFA.HARVARD.EDU
URL http://cfa-www.harvard.edu/iau/mpc.html
1997 QJ4
Revision to MPEC 1997-R09
Observations:
J97Q04J C1998 06 29.52388 23 51 40.45 +02 31 38.5 568
J97Q04J C1998 06 29.60606 23 51 40.44 +02 31 39.4 568
J97Q04J C1998 06 30.58512 23 51 40.28 +02 31 49.4 568
Observer details:
568 Mauna Kea. Observers D. Jewitt and C. Trujillo. 2.2-m University of
Hawaii reflector + CCD.
First and last observations above in comparison with prediction:
Residuals in seconds of arc (or two decimals in degrees) and reference
980629 568 0.03- 0.01- 980630 568 0.03- 0.01- MPC 30790
Orbital elements:
1997 QJ4
Assumed 2:3 Neptune librator
Epoch 1998 July 6.0 TT = JDT 2451000.5 Marsden
M 40.27558 (2000.0) P Q
n 0.00395618 Peri. 315.88902 +0.54571400 +0.83546259
a 39.5930133 Node 346.74090 -0.66913493 +0.38791028
e 0.1717899 Incl. 16.41026 -0.50443501 +0.38926582
P 249 H 7.5 G 0.15
Residuals in seconds of arc
970828 568 0.3- 0.5+ 970901 568 0.1- 0.9+ 970927 696 0.0 0.3-
970828 568 0.0 0.8+ 970923 568 0.2+ 0.4- 971005 675 1.0+ 1.3-
970828 568 0.3- 0.7+ 970923 568 0.3+ 0.7- 971005 675 1.0+ 1.2-
970829 568 0.5- 0.6+ 970923 568 0.2+ 0.3- 980629 568 0.2- 0.2+
970829 568 0.2- 0.4+ 970924 568 0.1- 0.3- 980629 568 0.1- 0.2+
970901 568 0.1- 0.8+ 970924 568 0.0 0.5- 980630 568 0.1+ 0.2+
970901 568 0.5- 0.9+ 970927 696 0.4- 1.1-
Ephemeris:
1997 QJ4 a,e,i = 39.59, 0.17, 16 q = 32.791
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
1998 07 26 23 51.04 +02 32.4 34.433 35.009 123.8 1.4 23.1
1998 08 05 23 50.52 +02 30.8 34.307 35.013 133.5 1.2 23.1
1998 08 15 23 49.88 +02 28.2 34.200 35.017 143.2 1.0 23.0
1998 08 25 23 49.13 +02 24.8 34.117 35.021 153.0 0.8 23.0
1998 09 04 23 48.30 +02 20.7 34.060 35.025 162.7 0.5 23.0
1998 09 14 23 47.41 +02 16.1 34.031 35.028 172.2 0.2 22.9
1998 09 24 23 46.51 +02 11.2 34.032 35.032 175.5 0.1 22.9
1998 10 04 23 45.63 +02 06.2 34.063 35.036 166.5 0.4 23.0
1998 10 14 23 44.79 +02 01.3 34.122 35.040 156.6 0.6 23.0
1998 10 24 23 44.04 +01 56.8 34.210 35.044 146.6 0.9 23.0
1998 11 03 23 43.39 +01 52.8 34.322 35.048 136.4 1.1 23.1
1998 11 13 23 42.88 +01 49.6 34.457 35.052 126.3 1.3 23.1
1998 11 23 23 42.52 +01 47.2 34.610 35.056 116.1 1.4 23.1
1998 12 03 23 42.33 +01 45.8 34.776 35.060 106.0 1.5 23.1
1998 12 13 23 42.31 +01 45.6 34.950 35.064 95.9 1.6 23.1
1998 12 23 23 42.49 +01 46.5 35.127 35.068 85.7 1.6 23.2
1999 01 02 23 42.84 +01 48.6 35.302 35.072 75.7 1.6 23.2
1999 01 12 23 43.36 +01 51.9 35.470 35.076 65.6 1.5 23.2
Brian G. Marsden (C) Copyright 1998 MPC M.P.E.C. 1998-P02
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