MPEC 1998-Y23 : 1998 YO4
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M.P.E.C. 1998-Y23 Issued 1998 Dec. 21, 20:32 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.
BMARSDEN@CFA.HARVARD.EDU or GWILLIAMS@CFA.HARVARD.EDU
URL http://cfa-www.harvard.edu/iau/mpc.html
1998 YO4
Observations:
J98Y04O* C1998 12 17.06912 03 40 11.67 +31 56 18.9 19.3 704
J98Y04O C1998 12 17.09245 03 40 09.89 +31 56 10.3 19.5 704
J98Y04O C1998 12 17.11537 03 40 07.75 +31 56 10.4 19.1 704
J98Y04O C1998 12 17.13929 03 40 05.63 +31 56 06.1 18.9 704
J98Y04O C1998 12 17.16227 03 40 03.51 +31 56 01.9 19.1 704
J98Y04O C1998 12 18.76602 03 37 50.25 +31 50 28.0 18.7 R 468
J98Y04O C1998 12 18.76649 03 37 50.16 +31 50 26.3 557
J98Y04O C1998 12 18.76881 03 37 50.03 +31 50 25.5 557
J98Y04O C1998 12 18.77105 03 37 49.84 +31 50 27.0 18.6 R 468
J98Y04O C1998 12 18.77113 03 37 49.82 +31 50 25.0 18.8 V 557
J98Y04O C1998 12 18.77711 03 37 49.32 +31 50 25.3 19.0 R 468
J98Y04O C1998 12 18.78238 03 37 48.90 +31 50 22.7 19.1 V 046
J98Y04O C1998 12 18.78576 03 37 48.68 +31 50 22.7 046
J98Y04O C1998 12 18.78726 03 37 48.42 +31 50 22.0 046
J98Y04O C1998 12 18.78962 03 37 48.34 +31 50 21.5 046
J98Y04O C1998 12 18.79262 03 37 48.01 +31 50 20.3 046
J98Y04O C1998 12 19.19808 03 37 15.46 +31 48 55.6 20.0 704
J98Y04O C1998 12 19.22103 03 37 13.50 +31 48 51.5 19.4 704
J98Y04O C1998 12 19.24381 03 37 11.42 +31 48 47.7 19.6 704
J98Y04O C1998 12 19.26670 03 37 09.58 +31 48 42.7 19.3 704
J98Y04O C1998 12 19.28907 03 37 07.84 +31 48 35.8 658
J98Y04O C1998 12 19.29300 03 37 07.50 +31 48 34.6 658
J98Y04O C1998 12 19.29890 03 37 07.06 +31 48 33.4 658
J98Y04O C1998 12 21.19353 03 34 41.48 +31 41 39.7 19.2 704
J98Y04O C1998 12 21.20395 03 34 40.59 +31 41 37.3 704
J98Y04O C1998 12 21.21436 03 34 39.83 +31 41 35.6 704
J98Y04O C1998 12 21.82155 03 33 55.39 +31 39 16.6 18.7 V 046
J98Y04O C1998 12 21.82581 03 33 55.02 +31 39 15.9 046
J98Y04O C1998 12 21.82800 03 33 54.92 +31 39 15.5 18.8 V 046
Observer details:
046 Klet. Observers J. Ticha, M. Tichy, Z. Moravec. Measurer M. Tichy.
0.57-m f/5.2 reflector + CCD.
468 Campo Catino. Observers M. Di Sora, F. Mallia. Measurers F. Rossi,
F. Mallia. 0.80-m f/4.0 reflector + CCD.
557 Ondrejov. Observer P. Pravec. 0.65-m f/3.6 reflector + CCD.
658 Dominion Astrophysical Observatory. Observer G. C. L. Aikman. 1.82-m
reflector + CCD.
704 Lincoln Laboratory ETS, New Mexico. Observers M. Blythe, F. Shelly,
M. Bezpalko. Measurers J. Stuart, H. Viggh, R. Sayer. 1.0-m f/2.15
reflector + CCD.
Orbital elements:
1998 YO4
Epoch 1998 Dec. 13.0 TT = JDT 2451160.5 Williams
M 231.83721 (2000.0) P Q
n 0.45369192 Peri. 190.64301 -0.79591570 +0.60148490
a 1.6773693 Node 26.70766 -0.54359756 -0.65999717
e 0.2373729 Incl. 8.80608 -0.26649556 -0.45013293
P 2.17 H 16.5 G 0.15
From 29 observations 1998 Dec. 17-21.
Ephemeris:
1998 YO4 a,e,i = 1.68, 0.24, 9 q = 1.2792
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
1998 12 13 03 46.32 +32 08.9 1.025 1.970 157.5 11.0 18.7
1998 12 23 03 32.53 +31 34.9 1.059 1.951 145.6 16.6 19.0
1999 01 02 03 23.64 +30 56.6 1.113 1.931 134.1 21.5 19.2
1999 01 12 03 20.03 +30 24.1 1.182 1.909 123.4 25.5 19.4
1999 01 22 03 21.44 +30 02.8 1.261 1.886 113.7 28.5 19.6
1999 02 01 03 27.33 +29 54.3 1.345 1.861 105.0 30.7 19.8
1999 02 11 03 37.02 +29 57.0 1.430 1.836 97.1 32.2 20.0
1999 02 21 03 49.99 +30 08.1 1.515 1.809 89.9 33.1 20.1
1999 03 03 04 05.77 +30 24.3 1.597 1.780 83.4 33.6 20.2
1999 03 13 04 23.97 +30 41.6 1.674 1.751 77.4 33.6 20.2
1999 03 23 04 44.31 +30 56.5 1.746 1.721 71.9 33.4 20.3
1999 04 02 05 06.51 +31 05.4 1.811 1.690 66.9 32.9 20.3
1999 04 12 05 30.32 +31 04.9 1.869 1.659 62.2 32.3 20.3
1999 04 22 05 55.55 +30 52.0 1.920 1.627 57.9 31.6 20.3
1999 05 02 06 21.93 +30 24.0 1.964 1.594 53.9 30.7 20.3
1999 05 12 06 49.23 +29 38.4 2.002 1.562 50.2 29.8 20.3
1999 05 22 07 17.25 +28 33.5 2.032 1.530 46.8 28.8 20.2
1999 06 01 07 45.74 +27 07.9 2.057 1.498 43.7 27.9 20.2
1999 06 11 08 14.50 +25 21.0 2.077 1.467 40.8 26.9 20.1
1999 06 21 08 43.39 +23 12.6 2.091 1.437 38.1 25.9 20.1
1999 07 01 09 12.28 +20 43.3 2.102 1.408 35.7 24.9 20.0
1999 07 11 09 41.09 +17 54.0 2.110 1.381 33.5 24.0 19.9
1999 07 21 10 09.83 +14 46.4 2.116 1.357 31.5 23.0 19.9
Gareth V. Williams (C) Copyright 1998 MPC M.P.E.C. 1998-Y23
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