MPEC 1999-H23: 1999 HX1
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M.P.E.C. 1999-H23 Issued 1999 Apr. 24, 14:45 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 ISSN 1523-6714
1999 HX1
Observations:
J99H01X* C1999 04 19.30342 14 18 58.25 +05 44 38.4 19.3 704
J99H01X C1999 04 19.31989 14 18 58.58 +05 45 09.9 19.3 704
J99H01X C1999 04 19.33649 14 18 59.07 +05 45 41.4 20.1 704
J99H01X C1999 04 19.35306 14 18 59.49 +05 46 10.1 19.8 704
J99H01X C1999 04 20.89626 14 19 42.61 +06 33 50.5 557
J99H01X C1999 04 20.89859 14 19 42.69 +06 33 55.4 557
J99H01X C1999 04 20.90091 14 19 42.75 +06 33 59.4 19.5 V 557
J99H01X C1999 04 20.96286 14 19 43.98 +06 35 56.8 17.5 R 046
J99H01X C1999 04 20.97248 14 19 44.22 +06 36 15.1 046
J99H01X C1999 04 20.97425 14 19 44.28 +06 36 17.8 046
J99H01X C1999 04 22.04282 14 20 14.96 +07 10 31.2 18.9 V 859
J99H01X C1999 04 22.04853 14 20 15.07 +07 10 42.5 19.0 V 859
J99H01X C1999 04 22.06141 14 20 15.34 +07 11 07.3 18.9 V 859
J99H01X C1999 04 22.36712 14 20 23.09 +07 20 26.9 658
J99H01X C1999 04 22.36983 14 20 23.14 +07 20 32.1 658
J99H01X C1999 04 22.37277 14 20 23.21 +07 20 37.9 658
J99H01X C1999 04 22.51986 14 20 28.49 +07 25 50.8 19.3 R 426
J99H01X C1999 04 22.52372 14 20 28.52 +07 25 58.5 19.7 R 426
J99H01X C1999 04 22.52962 14 20 28.67 +07 26 10.0 19.5 R 426
J99H01X C1999 04 23.03819 14 20 41.76 +07 42 02.2 557
J99H01X C1999 04 23.04017 14 20 41.81 +07 42 05.7 557
J99H01X C1999 04 23.04215 14 20 41.85 +07 42 09.0 18.9 V 557
J99H01X C1999 04 23.08336 14 20 42.80 +07 43 29.5 046
J99H01X C1999 04 23.08635 14 20 42.86 +07 43 35.1 046
J99H01X C1999 04 23.08791 14 20 42.95 +07 43 38.3 18.4 R 046
J99H01X C1999 04 23.08950 14 20 42.97 +07 43 40.6 046
J99H01X C1999 04 23.27167 14 20 49.35 +07 49 35.7 658
J99H01X C1999 04 23.27530 14 20 49.48 +07 49 43.3 658
J99H01X C1999 04 23.27809 14 20 49.53 +07 49 48.6 658
J99H01X C1999 04 23.57977 14 20 58.15 +08 00 08.5 19.0 R 426
J99H01X C1999 04 23.58353 14 20 58.24 +08 00 16.0 19.4 R 426
J99H01X C1999 04 23.58791 14 20 58.29 +08 00 24.5 19.3 R 426
J99H01X C1999 04 23.85544 14 21 06.35 +08 08 33.3 557
J99H01X C1999 04 23.86337 14 21 06.54 +08 08 49.7 557
J99H01X C1999 04 23.86535 14 21 06.60 +08 08 54.2 557
J99H01X C1999 04 23.97626 14 21 09.14 +08 12 33.0 18.2 R 046
J99H01X C1999 04 23.97775 14 21 09.08 +08 12 36.1 046
J99H01X C1999 04 23.97929 14 21 09.14 +08 12 38.8 046
J99H01X C1999 04 23.98079 14 21 09.17 +08 12 42.1 046
J99H01X C1999 04 23.98231 14 21 09.23 +08 12 45.4 046
J99H01X C1999 04 24.28122 14 21 18.45 +08 22 32.8 658
J99H01X C1999 04 24.28807 14 21 18.62 +08 22 46.3 658
J99H01X C1999 04 24.28973 14 21 18.63 +08 22 49.7 658
Observer details:
046 Klet. Observers J. Ticha, M. Tichy. Measurer M. Tichy. 0.57-m f/5.2
reflector + CCD.
426 Woomera. Observer F. B. Zoltowski. 0.30-m f/3.3 Schmidt-Cassegrain + CCD.
557 Ondrejov. Observer L. Sarounova. 0.65-m f/3.6 reflector + CCD.
658 Dominion Astrophysical Observatory. Observer D. D. Balam. 1.82-m
reflector + CCD.
704 Lincoln Laboratory ETS, New Mexico. Observers M. Blythe, F. Shelly,
M. Bezpalko, M. Elowitz. Measurers J. Stuart, H. Viggh, R. Sayer. 1.0-m
f/2.15 reflector + CCD.
859 Serra da Piedade. Observers C. Jacques, J. Amancio. 0.3-m f/3.3
Schimdt-Cassegrain + CCD.
Orbital elements:
1999 HX1
Epoch 1999 Apr. 12.0 TT = JDT 2451280.5 Williams
M 342.30855 (2000.0) P Q
n 0.23912756 Peri. 98.48744 -0.00318741 +0.99976155
a 2.5706895 Node 171.24264 -0.96422023 +0.00265392
e 0.5640631 Incl. 8.15720 -0.26508335 -0.02167472
P 4.12 H 19.9 G 0.15
From 43 observations 1999 Apr. 19-24.
Ephemeris:
1999 HX1 a,e,i = 2.57, 0.56, 8 q = 1.1207
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
1999 04 22 14 20.21 +07 09.0 0.363 1.352 160.0 14.7 19.2
1999 04 27 14 22.66 +09 53.5 0.336 1.321 156.4 17.7 19.1
1999 05 02 14 25.48 +12 46.5 0.313 1.292 151.9 21.5 19.0
1999 05 07 14 28.90 +15 44.1 0.293 1.265 147.0 25.7 18.9
1999 05 12 14 33.20 +18 41.9 0.276 1.239 142.0 30.1 18.9
1999 05 17 14 38.71 +21 35.2 0.261 1.215 137.1 34.5 18.8
1999 05 22 14 45.79 +24 19.3 0.248 1.194 132.5 38.7 18.8
1999 05 27 14 54.80 +26 50.6 0.236 1.174 128.3 42.6 18.8
1999 06 01 15 06.03 +29 05.3 0.226 1.158 124.7 46.0 18.7
1999 06 06 15 19.73 +30 59.9 0.217 1.144 121.8 48.9 18.7
1999 06 11 15 36.07 +32 29.6 0.209 1.134 119.6 51.1 18.7
1999 06 16 15 55.18 +33 29.2 0.202 1.126 118.3 52.6 18.6
1999 06 21 16 16.98 +33 52.9 0.196 1.122 118.0 53.1 18.6
1999 06 26 16 41.12 +33 35.3 0.191 1.121 118.6 52.8 18.5
1999 07 01 17 06.93 +32 31.8 0.188 1.123 120.2 51.5 18.4
1999 07 06 17 33.50 +30 39.4 0.186 1.129 122.8 49.2 18.4
1999 07 11 17 59.82 +27 58.9 0.187 1.138 126.3 46.1 18.3
1999 07 16 18 25.03 +24 36.1 0.191 1.149 130.5 42.3 18.2
1999 07 21 18 48.49 +20 41.9 0.197 1.164 135.2 38.0 18.2
1999 07 26 19 09.80 +16 30.3 0.207 1.182 140.1 33.5 18.2
1999 07 31 19 28.82 +12 15.5 0.221 1.202 144.8 29.2 18.3
1999 08 05 19 45.61 +08 09.3 0.238 1.225 148.9 25.3 18.4
1999 08 10 20 00.40 +04 20.4 0.259 1.249 152.3 22.2 18.5
1999 08 15 20 13.49 +00 54.4 0.285 1.276 154.5 20.0 18.7
1999 08 20 20 25.21 -02 06.2 0.314 1.304 155.4 18.9 18.9
1999 08 25 20 35.82 -04 40.9 0.347 1.334 155.0 18.7 19.2
1999 08 30 20 45.54 -06 51.0 0.384 1.365 153.6 19.2 19.5
1999 09 04 20 54.56 -08 38.5 0.425 1.397 151.4 20.2 19.8
1999 09 09 21 03.06 -10 05.7 0.470 1.430 148.7 21.5 20.1
1999 09 14 21 11.20 -11 14.8 0.519 1.464 145.8 22.7 20.4
1999 09 19 21 19.09 -12 08.0 0.571 1.499 142.6 24.0 20.7
1999 09 24 21 26.80 -12 47.4 0.626 1.534 139.4 25.2 21.0
1999 09 29 21 34.38 -13 14.8 0.685 1.570 136.2 26.2 21.2
1999 10 04 21 41.88 -13 31.7 0.748 1.606 132.9 27.2 21.5
1999 10 09 21 49.32 -13 39.7 0.813 1.642 129.6 28.0 21.8
1999 10 14 21 56.76 -13 39.7 0.882 1.678 126.4 28.6 22.0
1999 10 19 22 04.19 -13 32.9 0.954 1.715 123.1 29.1 22.2
Gareth V. Williams (C) Copyright 1999 MPC M.P.E.C. 1999-H23
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