MPEC 1998-P01 : 1997 QH4
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M.P.E.C. 1998-P01 Issued 1998 Aug. 1, 01:07 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 QH4
Revision to MPEC 1997-R08
Observations:
J97Q04H C1998 06 29.53722 23 52 14.06 -00 37 18.8 568
J97Q04H C1998 06 30.57255 23 52 13.86 -00 37 16.2 568
J97Q04H C1998 07 01.51000 23 52 13.62 -00 37 14.2 568
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 and reference
980629 568 94.6- 36.8- 980701 568 95.1- 36.7- MPC 30790
Orbital elements:
1997 QH4
Eccentricity assumed
Epoch 1998 July 6.0 TT = JDT 2451000.5 Marsden
M 356.15673 (2000.0) P Q
n 0.00349320 Peri. 5.05352 +0.99973683 -0.01549493
a 43.0183517 Node 355.72334 +0.00238990 +0.80375254
e 0.0373076 Incl. 13.11174 +0.02281580 +0.59476193
P 282 H 7.0 G 0.15
Residuals in seconds of arc
970827 568 0.2+ 0.4+ 970901 568 0.1+ 0.1- 971005 675 0.6+ 0.4-
970827 568 0.5- 0.3+ 970901 568 0.2+ 0.0 971005 675 0.4+ 0.6-
970827 568 0.1+ 0.1- 970923 568 0.6- 0.2+ 971005 675 0.4+ 0.5-
970828 568 0.5- 0.0 970923 568 0.1- 0.2- 980629 568 0.2- 0.1-
970828 568 0.8- 0.0 970923 568 0.2- 0.0 980630 568 0.3- 0.1-
970828 568 0.8- 0.0 970924 568 0.4- 0.0 980701 568 0.2- 0.1+
970901 568 0.5+ 0.0 970924 568 0.9- 0.2-
Ephemeris:
1997 QH4 a,e,i = 43.02, 0.04, 13 q = 41.413
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
1998 07 26 23 51.69 -00 39.2 40.826 41.417 125.0 1.2 23.3
1998 08 05 23 51.24 -00 41.5 40.697 41.417 134.7 1.0 23.3
1998 08 15 23 50.69 -00 44.5 40.589 41.417 144.4 0.8 23.3
1998 08 25 23 50.05 -00 48.0 40.504 41.417 154.2 0.6 23.2
1998 09 04 23 49.34 -00 52.0 40.446 41.417 164.1 0.4 23.2
1998 09 14 23 48.60 -00 56.3 40.416 41.417 174.0 0.1 23.2
1998 09 24 23 47.83 -01 00.7 40.416 41.417 176.0 0.1 23.2
1998 10 04 23 47.07 -01 05.0 40.445 41.417 166.0 0.3 23.2
1998 10 14 23 46.36 -01 09.1 40.504 41.417 155.9 0.6 23.2
1998 10 24 23 45.71 -01 12.8 40.590 41.417 145.8 0.8 23.3
1998 11 03 23 45.15 -01 16.0 40.701 41.416 135.7 1.0 23.3
1998 11 13 23 44.70 -01 18.4 40.833 41.416 125.6 1.1 23.3
1998 11 23 23 44.38 -01 20.0 40.983 41.416 115.4 1.2 23.3
1998 12 03 23 44.20 -01 20.6 41.147 41.416 105.2 1.3 23.3
1998 12 13 23 44.18 -01 20.3 41.318 41.416 95.1 1.4 23.4
1998 12 23 23 44.31 -01 19.0 41.492 41.416 84.9 1.4 23.4
1999 01 02 23 44.59 -01 16.8 41.663 41.416 74.8 1.3 23.4
1999 01 12 23 45.01 -01 13.5 41.826 41.416 64.7 1.2 23.4
(Last issue was M.P.E.C. 1998-O27)
Brian G. Marsden (C) Copyright 1998 MPC M.P.E.C. 1998-P01
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