MPEC 1997-Y21: 1997 YM9
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M.P.E.C. 1997-Y21 Issued 1997 Dec. 30, 23:29 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 YM9
Observations:
J97Y09M* C1997 12 28.57789 08 52 35.74 +28 35 22.6 18.7 V 566
J97Y09M C1997 12 28.58837 08 52 41.51 +28 37 40.0 19.4 V 566
J97Y09M C1997 12 28.59859 08 52 47.15 +28 39 54.9 18.9 V 566
J97Y09M C1997 12 29.47407 09 03 02.73 +31 58 00.1 19.2 V 566
J97Y09M C1997 12 29.48350 09 03 08.47 +32 00 12.1 19.0 V 566
J97Y09M C1997 12 29.49361 09 03 14.65 +32 02 33.6 19.2 V 566
J97Y09M C1997 12 29.50197 09 03 19.77 +32 04 28.5 19.1 V 566
J97Y09M C1997 12 29.51220 09 03 26.04 +32 06 50.9 18.8 V 566
J97Y09M C1997 12 29.52283 09 03 32.48 +32 09 18.2 19.1 V 566
J97Y09M C1997 12 29.59038 09 04 13.84 +32 24 41.3 19.2 V 566
J97Y09M C1997 12 29.60021 09 04 19.96 +32 26 54.4 19.3 V 566
J97Y09M C1997 12 29.61022 09 04 26.20 +32 29 08.6 19.2 V 566
J97Y09M C1997 12 29.89495 09 08 18.12 +33 31 57.1 046
J97Y09M C1997 12 29.89678 09 08 19.41 +33 32 22.3 046
J97Y09M C1997 12 29.89750 09 08 19.79 +33 32 32.7 046
J97Y09M C1997 12 29.89884 09 08 20.91 +33 32 51.6 18.5 V 046
J97Y09M C1997 12 30.55704 09 16 44.76 +36 07 45.3 18.9 V 566
J97Y09M C1997 12 30.56675 09 16 51.47 +36 09 58.8 19.1 V 566
J97Y09M C1997 12 30.57696 09 16 58.61 +36 12 19.2 19.0 V 566
Observer details:
046 Klet. Observers J. Ticha, M. Tichy. Measurer M. Tichy. 0.57-m f/5.2
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 YM9
Epoch 1997 Dec. 18.0 TT = JDT 2450800.5 Williams
M 311.06773 (2000.0) P Q
n 0.85966691 Peri. 50.96110 -0.82368053 -0.55032440
a 1.0954248 Node 95.24106 +0.46855924 -0.79633121
e 0.1037583 Incl. 7.89152 +0.31937850 -0.25099732
P 1.15 H 25.0 G 0.15
From 19 observations 1997 Dec. 28-30.
Ephemeris:
1997 YM9 a,e,i = 1.10, 0.10, 8 q = 0.9818
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
1997 12 28 08 46.58 +26 27.4 0.036 1.014 148.4 30.5 19.1
1997 12 29 08 57.37 +30 09.4 0.035 1.013 146.9 32.0 19.1
1997 12 30 09 09.43 +33 57.9 0.035 1.012 144.9 33.9 19.1
1997 12 31 09 22.93 +37 48.7 0.034 1.011 142.5 36.4 19.2
1998 01 01 09 38.07 +41 36.9 0.034 1.009 139.6 39.2 19.2
1998 01 02 09 55.00 +45 17.4 0.034 1.008 136.4 42.3 19.3
1998 01 03 10 13.86 +48 44.9 0.034 1.007 133.1 45.5 19.4
1998 01 04 10 34.70 +51 54.3 0.035 1.006 129.7 48.8 19.5
1998 01 05 10 57.48 +54 41.6 0.035 1.005 126.3 52.1 19.7
1998 01 06 11 21.98 +57 03.9 0.036 1.004 123.0 55.3 19.8
1998 01 07 11 47.78 +58 59.6 0.038 1.003 119.8 58.3 20.0
1998 01 08 12 14.33 +60 28.6 0.039 1.001 116.8 61.2 20.1
1998 01 09 12 40.93 +61 32.2 0.040 1.000 114.0 63.9 20.3
1998 01 10 13 06.88 +62 13.0 0.042 0.999 111.4 66.4 20.4
1998 01 11 13 31.61 +62 34.0 0.043 0.998 109.0 68.6 20.6
1998 01 12 13 54.67 +62 38.8 0.045 0.997 106.8 70.7 20.8
1998 01 13 14 15.82 +62 30.9 0.047 0.997 104.8 72.6 20.9
1998 01 14 14 34.98 +62 13.4 0.049 0.996 102.9 74.4 21.0
1998 01 15 14 52.20 +61 48.8 0.051 0.995 101.2 75.9 21.2
1998 01 16 15 07.60 +61 19.4 0.053 0.994 99.6 77.4 21.3
1998 01 17 15 21.34 +60 46.8 0.055 0.993 98.2 78.7 21.4
1998 01 18 15 33.61 +60 12.3 0.057 0.992 96.9 79.9 21.6
1998 01 19 15 44.57 +59 36.8 0.059 0.991 95.6 80.9 21.7
1998 01 20 15 54.38 +59 01.1 0.061 0.991 94.5 81.9 21.8
1998 01 21 16 03.20 +58 25.5 0.063 0.990 93.5 82.8 21.9
1998 01 22 16 11.14 +57 50.6 0.066 0.989 92.6 83.6 22.0
1998 01 23 16 18.32 +57 16.4 0.068 0.989 91.7 84.3 22.1
1998 01 24 16 24.84 +56 43.2 0.070 0.988 91.0 85.0 22.2
1998 01 25 16 30.78 +56 11.0 0.072 0.987 90.2 85.6 22.3
1998 01 26 16 36.21 +55 39.8 0.074 0.987 89.6 86.1 22.3
1998 01 27 16 41.19 +55 09.8 0.076 0.986 89.0 86.6 22.4
Gareth V. Williams (C) Copyright 1997 MPC M.P.E.C. 1997-Y21
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