MPEC 1998-H17: 1998 HE3
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M.P.E.C. 1998-H17 Issued 1998 Apr. 23, 14:16 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 HE3
Observations:
J98H03E* C1998 04 21.27552 15 29 58.09 -09 23 43.1 18.3 R 683
J98H03E C1998 04 21.29794 15 29 52.84 -09 23 15.3 18.2 R 683
J98H03E C1998 04 21.32066 15 29 47.61 -09 22 47.2 18.5 R 683
J98H03E C1998 04 21.43469 15 29 20.79 -09 20 25.4 683
J98H03E C1998 04 21.45056 15 29 17.10 -09 20 05.1 18.4 R 683
J98H03E C1998 04 21.46697 15 29 13.27 -09 19 43.8 18.2 R 683
J98H03E C1998 04 21.88573 15 27 45.23 -09 10 53.1 18.0 V 104
J98H03E C1998 04 21.88981 15 27 44.31 -09 10 48.0 104
J98H03E C1998 04 21.89347 15 27 43.52 -09 10 43.8 104
J98H03E C1998 04 21.97008 15 27 24.69 -09 09 08.3 18.5 V 046
J98H03E C1998 04 21.98032 15 27 22.15 -09 08 55.4 046
J98H03E C1998 04 21.98677 15 27 20.52 -09 08 46.4 046
J98H03E C1998 04 21.98788 15 27 20.32 -09 08 44.8 046
J98H03E C1998 04 21.98902 15 27 20.08 -09 08 43.2 046
J98H03E C1998 04 22.00111 15 27 17.01 -09 08 27.7 557
J98H03E C1998 04 22.00273 15 27 16.66 -09 08 26.5 18.6 V 557
J98H03E C1998 04 22.01120 15 27 14.68 -09 08 15.4 557
J98H03E IC1998 04 22.01470 15 27 13.65 -09 08 10.2 557
J98H03E C1998 04 22.39887 15 25 43.21 -08 59 18.3 18.1 R 683
J98H03E C1998 04 22.40583 15 25 41.33 -08 59 09.0 18.3 R 683
J98H03E C1998 04 22.42392 15 25 36.63 -08 58 43.5 18.8 R 683
J98H03E C1998 04 22.46693 15 25 25.52 -08 57 43.2 683
J98H03E C1998 04 22.47432 15 25 23.51 -08 57 32.6 683
J98H03E C1998 04 22.97043 15 23 23.95 -08 46 02.0 557
J98H03E C1998 04 22.97206 15 23 23.57 -08 45 59.2 18.6 V 557
J98H03E C1998 04 23.05709 15 23 00.12 -08 43 54.0 118
J98H03E C1998 04 23.05933 15 22 59.54 -08 43 51.0 118
J98H03E C1998 04 23.06380 15 22 58.32 -08 43 44.4 118
J98H03E C1998 04 23.07516 15 22 55.36 -08 43 27.9 046
J98H03E C1998 04 23.07635 15 22 54.99 -08 43 26.3 046
J98H03E C1998 04 23.07774 15 22 54.56 -08 43 23.7 046
J98H03E C1998 04 23.28332 15 22 04.13 -08 38 04.4 18.2 R 683
J98H03E C1998 04 23.28666 15 22 03.13 -08 38 00.1 18.1 R 683
J98H03E C1998 04 23.29326 15 22 01.30 -08 37 49.4 17.9 R 683
Observer details:
046 Klet. Observers M. Tichy, Z. Moravec. Measurer M. Tichy. 0.57-m f/5.2
reflector + CCD.
104 San Marcello Pistoiese. Observers L. Tesi, A. Boattini. Measurers
A. Boattini, G. Forti, L. Tesi. 0.40-m f/5 reflector + CCD.
118 Modra. Observers L. Kornos, P. Koleny. 0.6-m f/5.5 reflector + CCD.
557 Ondrejov. Observer P. Pravec. 0.65-m f/3.6 reflector + CCD.
683 Goodricke-Pigott Observatory, Tucson. Observer R. A. Tucker. 0.36-m
Schmidt-Cassegrain + CCD.
Orbital elements:
1998 HE3 PHA 0.003
Epoch 1998 Apr. 17.0 TT = JDT 2450920.5 Williams
M 241.31907 (2000.0) P Q
n 1.19707608 Peri. 309.00833 +0.99760584 -0.04959563
a 0.8784591 Node 53.88642 +0.06552303 +0.90076784
e 0.4426665 Incl. 3.42028 -0.02212059 +0.43145982
P 0.82 H 21.5 G 0.15
From 34 observations 1998 Apr. 21-23.
Ephemeris:
1998 HE3 a,e,i = 0.88, 0.44, 3 q = 0.4896
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
1998 04 17 15 41.94 -10 36.1 0.176 1.159 149.9 25.7 19.2
1998 04 18 15 39.62 -10 21.4 0.169 1.155 151.4 24.6 19.1
1998 04 19 15 37.02 -10 05.4 0.162 1.151 152.9 23.4 19.0
1998 04 20 15 34.12 -09 47.9 0.155 1.146 154.5 22.1 18.8
1998 04 21 15 30.89 -09 28.7 0.148 1.142 156.2 20.8 18.7
1998 04 22 15 27.29 -09 07.6 0.141 1.137 157.9 19.4 18.5
1998 04 23 15 23.26 -08 44.4 0.134 1.132 159.7 18.0 18.3
1998 04 24 15 18.77 -08 18.7 0.128 1.127 161.5 16.4 18.2
1998 04 25 15 13.75 -07 50.2 0.121 1.122 163.4 14.9 18.0
1998 04 26 15 08.14 -07 18.5 0.115 1.117 165.2 13.3 17.8
1998 04 27 15 01.84 -06 43.1 0.108 1.112 166.9 11.8 17.6
1998 04 28 14 54.78 -06 03.3 0.102 1.107 168.4 10.5 17.4
1998 04 29 14 46.83 -05 18.6 0.096 1.102 169.4 9.6 17.3
1998 04 30 14 37.87 -04 28.1 0.091 1.097 169.6 9.6 17.1
1998 05 01 14 27.75 -03 31.0 0.085 1.091 168.5 10.6 17.0
1998 05 02 14 16.31 -02 26.3 0.080 1.086 166.3 12.7 16.9
1998 05 03 14 03.36 -01 13.0 0.075 1.080 163.1 15.8 16.9
1998 05 04 13 48.70 +00 09.9 0.070 1.074 159.0 19.6 16.9
1998 05 05 13 32.14 +01 42.9 0.066 1.069 154.2 24.2 16.9
1998 05 06 13 13.50 +03 26.2 0.063 1.063 148.7 29.5 16.9
1998 05 07 12 52.68 +05 19.1 0.059 1.057 142.5 35.5 16.9
1998 05 08 12 29.68 +07 19.6 0.057 1.051 135.8 42.1 17.0
1998 05 09 12 04.67 +09 24.0 0.055 1.045 128.5 49.1 17.1
1998 05 10 11 38.05 +11 27.4 0.054 1.038 120.9 56.6 17.3
1998 05 11 11 10.40 +13 23.9 0.054 1.032 113.0 64.2 17.5
1998 05 12 10 42.48 +15 08.3 0.054 1.026 105.2 71.9 17.7
1998 05 13 10 15.07 +16 36.7 0.055 1.019 97.6 79.3 18.0
1998 05 14 09 48.87 +17 47.5 0.057 1.013 90.4 86.4 18.3
1998 05 15 09 24.41 +18 41.1 0.060 1.006 83.6 93.0 18.7
1998 05 16 09 01.97 +19 19.4 0.063 0.999 77.4 99.1 19.1
1998 05 17 08 41.66 +19 45.2 0.067 0.992 71.7 104.7 19.5
1998 05 18 08 23.43 +20 01.1 0.071 0.985 66.5 109.7 19.9
1998 05 19 08 07.14 +20 09.5 0.075 0.978 61.8 114.3 20.3
1998 05 20 07 52.62 +20 12.4 0.080 0.971 57.5 118.6 20.7
1998 05 21 07 39.66 +20 11.5 0.085 0.964 53.5 122.4 21.1
1998 05 22 07 28.06 +20 08.0 0.090 0.957 49.9 126.0 21.5
1998 05 23 07 17.66 +20 02.7 0.095 0.949 46.5 129.3 21.9
1998 05 24 07 08.28 +19 56.2 0.101 0.942 43.4 132.4 22.3
1998 05 25 06 59.80 +19 49.1 0.106 0.935 40.5 135.2 22.8
1998 05 26 06 52.08 +19 41.7 0.112 0.927 37.8 138.0 23.2
1998 05 27 06 45.04 +19 34.2 0.118 0.919 35.2 140.5 23.6
Gareth V. Williams (C) Copyright 1998 MPC M.P.E.C. 1998-H17
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