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Read MPEC 1997-Y24
Read MPEC 1998-A02
M.P.E.C. 1998-A01 Issued 1998 Jan. 1, 06:00 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 YL11
Observations:
J97Y11L* C1997 12 29.57782 09 05 07.11 +29 53 38.7 19.0 V 566
J97Y11L C1997 12 29.58806 09 05 07.43 +29 53 42.1 18.9 V 566
J97Y11L C1997 12 29.59782 09 05 07.68 +29 53 45.4 19.1 V 566
J97Y11L C1997 12 30.87185 09 05 48.48 +30 00 56.2 18.4 V 046
J97Y11L C1997 12 30.87971 09 05 48.65 +30 00 59.2 046
J97Y11L C1997 12 30.88285 09 05 48.76 +30 01 00.1 046
J97Y11L C1997 12 30.88416 09 05 48.82 +30 01 00.6 046
J97Y11L C1997 12 30.99696 09 05 51.75 +30 01 41.9 18.5 V 557
J97Y11L C1997 12 31.00866 09 05 52.05 +30 01 46.0 557
J97Y11L C1998 01 01.02990 09 06 20.53 +30 07 41.9 18.8 V 046
J97Y11L C1998 01 01.03584 09 06 20.61 +30 07 44.5 046
J97Y11L C1998 01 01.04162 09 06 20.71 +30 07 46.2 046
Observer details:
046 Klet. Observers J. Ticha, M. Tichy. Measurer M. Tichy.
0.57-m f/5.2 reflector + CCD.
557 Ondrejov. Observer L. Sarounova. 0.65-m f/3.6 reflector + CCD.
566 Haleakala-NEAT/GEODSS. Observers E. F. Helin, S. Pravdo, K. J. Lawrence,
D. L. Rabinowitz for the NEAT team. 1.0-m f/2.2 GEODSS telescope + CCD.
Orbital elements:
1997 YL11
Epoch 1997 Dec. 18.0 TT = JDT 2450800.5 Marsden
M 350.69697 (2000.0) P Q
n 0.22502665 Peri. 91.81919 -0.62026375 -0.78232142
a 2.6769900 Node 36.71514 +0.67645143 -0.57026643
e 0.4218720 Incl. 5.46864 +0.39709739 -0.25053822
P 4.38 H 17.5 G 0.15
From 12 observations 1997 Dec. 29-1998 Jan. 1.
Ephemeris:
1997 YL11 a,e,i = 2.68, 0.42, 5 q = 1.5476
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
1997 12 28 09 04.20 +29 44.7 0.665 1.573 144.5 21.3 18.6
1998 01 02 09 06.75 +30 13.4 0.640 1.566 148.6 19.1 18.5
1998 01 07 09 08.23 +30 42.7 0.619 1.559 152.7 16.8 18.3
1998 01 12 09 08.69 +31 10.9 0.602 1.555 156.7 14.5 18.2
1998 01 17 09 08.20 +31 36.5 0.589 1.551 160.4 12.3 18.0
1998 01 22 09 06.91 +31 57.6 0.580 1.549 163.3 10.5 17.9
1998 01 27 09 05.00 +32 12.4 0.575 1.548 165.0 9.5 17.9
1998 02 01 09 02.76 +32 19.4 0.575 1.548 164.8 9.6 17.9
1998 02 06 09 00.49 +32 17.3 0.580 1.550 163.0 10.7 17.9
1998 02 11 08 58.48 +32 05.7 0.588 1.552 159.9 12.6 18.0
1998 02 16 08 56.97 +31 44.8 0.601 1.557 156.2 14.8 18.2
1998 02 21 08 56.16 +31 15.2 0.617 1.562 152.3 17.1 18.3
1998 02 26 08 56.18 +30 37.5 0.638 1.569 148.2 19.4 18.5
1998 03 03 08 57.14 +29 52.8 0.662 1.577 144.2 21.6 18.6
1998 03 08 08 59.08 +29 02.2 0.690 1.586 140.3 23.6 18.8
1998 03 13 09 01.95 +28 06.7 0.721 1.596 136.5 25.4 19.0
1998 03 18 09 05.70 +27 07.4 0.755 1.607 132.9 27.0 19.1
1998 03 23 09 10.24 +26 04.9 0.792 1.620 129.4 28.4 19.3
1998 03 28 09 15.50 +24 59.9 0.832 1.633 126.1 29.6 19.5
1998 04 02 09 21.40 +23 52.8 0.875 1.647 122.9 30.6 19.6
1998 04 07 09 27.85 +22 44.0 0.920 1.663 119.8 31.5 19.8
1998 04 12 09 34.76 +21 34.1 0.968 1.679 116.9 32.2 19.9
1998 04 17 09 42.05 +20 23.1 1.018 1.696 114.0 32.7 20.1
1998 04 22 09 49.65 +19 11.5 1.070 1.713 111.3 33.1 20.2
1998 04 27 09 57.52 +17 59.2 1.124 1.732 108.6 33.4 20.3
1998 05 02 10 05.61 +16 46.4 1.180 1.751 106.0 33.6 20.5
1998 05 07 10 13.87 +15 33.4 1.238 1.771 103.5 33.7 20.6
1998 05 12 10 22.26 +14 20.2 1.298 1.791 101.0 33.6 20.7
1998 05 17 10 30.75 +13 06.9 1.360 1.812 98.6 33.5 20.9
1998 05 22 10 39.31 +11 53.7 1.423 1.833 96.2 33.3 21.0
1998 05 27 10 47.94 +10 40.7 1.488 1.855 93.8 33.0 21.1
(Last issue was M.P.E.C. 1997-Y24)
Brian G. Marsden (C) Copyright 1998 MPC M.P.E.C. 1998-A01
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