MPEC 1998-H12: 1998 HL1
The following Minor Planet Electronic Circular may be linked-to from your own Web pages, but must not otherwise be redistributed electronically.
Read MPEC 1998-H11
Read MPEC 1998-H13
M.P.E.C. 1998-H12 Issued 1998 Apr. 21, 13:58 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 HL1
Observations:
J98H01L* C1998 04 18.25679 12 46 07.20 -16 14 39.7 18.9 704
J98H01L C1998 04 18.27767 12 46 05.38 -16 13 42.2 19.5 704
J98H01L C1998 04 18.29846 12 46 03.35 -16 12 46.8 19.9 704
J98H01L C1998 04 18.31917 12 46 01.42 -16 11 50.7 20.1 704
J98H01L C1998 04 19.23274 12 44 46.15 -15 30 41.0 18.5 704
J98H01L C1998 04 19.25466 12 44 44.21 -15 29 41.7 19.0 704
J98H01L C1998 04 19.27627 12 44 42.18 -15 28 42.5 19.2 704
J98H01L C1998 04 19.29785 12 44 40.35 -15 27 43.3 19.0 704
J98H01L C1998 04 19.31922 12 44 38.47 -15 26 48.6 19.5 704
J98H01L WC1998 04 19.93753 12 43 48.54 -14 58 53.8 557
J98H01L WC1998 04 19.93986 12 43 48.34 -14 58 50.5 557
J98H01L WC1998 04 19.94241 12 43 48.10 -14 58 40.5 557
J98H01L WC1998 04 19.94473 12 43 47.96 -14 58 37.1 557
J98H01L C1998 04 20.54116 12 43 00.70 -14 31 32.7 18.7 V 402
J98H01L C1998 04 20.54325 12 43 00.55 -14 31 29.4 402
J98H01L C1998 04 20.54534 12 43 00.27 -14 31 21.6 402
J98H01L C1998 04 20.83794 12 42 37.51 -14 18 09.3 18.8 V 104
J98H01L C1998 04 20.84219 12 42 37.22 -14 17 58.2 104
J98H01L C1998 04 20.84618 12 42 36.91 -14 17 46.5 104
J98H01L C1998 04 20.90799 12 42 31.62 -14 15 00.2 19.2 V 046
J98H01L C1998 04 20.91179 12 42 31.34 -14 14 50.1 046
J98H01L C1998 04 20.91309 12 42 31.17 -14 14 46.6 046
J98H01L C1998 04 20.91432 12 42 31.10 -14 14 42.9 046
J98H01L WC1998 04 20.92814 12 42 29.96 -14 14 06.3 557
J98H01L C1998 04 20.93012 12 42 29.75 -14 13 59.5 19.0 V 557
J98H01L WC1998 04 20.93209 12 42 29.69 -14 13 56.0 557
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.
402 Dynic Astronomical Observatory. Observer A. Sugie. 0.60-m f/3.7 reflector
+ CCD.
557 Ondrejov. Observer P. Pravec. 0.65-m f/3.6 reflector + CCD.
704 Lincoln Laboratory ETS, New Mexico. Observers M. Blythe, F. Shelly,
M. Bezpalko. Measurers J. Stuart, H. Viggh. 1.0-m f/2.15 reflector + CCD.
Orbital elements:
1998 HL1 PHA 0.037D
Epoch 1998 Apr. 17.0 TT = JDT 2450920.5 Williams
M 210.17794 (2000.0) P Q
n 0.71852108 Peri. 147.89737 +0.98352225 -0.00920354
a 1.2345529 Node 214.08080 -0.01490512 +0.99117531
e 0.1791577 Incl. 18.79648 +0.18017166 +0.13223765
P 1.37 H 19.0 G 0.15
From 26 observations 1998 Apr. 18-20.
Ephemeris:
1998 HL1 a,e,i = 1.23, 0.18, 19 q = 1.0134
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
1998 04 17 12 47.91 -17 10.7 0.440 1.434 165.7 9.9 18.6
1998 04 22 12 41.13 -13 25.3 0.440 1.428 161.2 13.1 18.8
1998 04 27 12 35.43 -09 41.8 0.445 1.422 154.8 17.5 18.9
1998 05 02 12 31.06 -06 09.3 0.456 1.416 148.0 22.1 19.1
1998 05 07 12 28.14 -02 54.4 0.472 1.408 141.3 26.6 19.3
1998 05 12 12 26.67 -00 01.3 0.491 1.401 135.0 30.7 19.5
1998 05 17 12 26.60 +02 28.6 0.513 1.392 129.0 34.4 19.7
1998 05 22 12 27.83 +04 35.5 0.537 1.383 123.5 37.6 19.9
1998 05 27 12 30.28 +06 20.5 0.563 1.374 118.5 40.4 20.0
1998 06 01 12 33.85 +07 45.4 0.590 1.364 113.9 42.8 20.2
1998 06 06 12 38.42 +08 52.5 0.617 1.354 109.7 44.9 20.3
1998 06 11 12 43.86 +09 43.9 0.644 1.343 105.8 46.7 20.5
1998 06 16 12 50.08 +10 21.7 0.671 1.331 102.3 48.2 20.6
1998 06 21 12 56.99 +10 47.3 0.698 1.320 99.0 49.5 20.7
1998 06 26 13 04.55 +11 02.5 0.723 1.307 96.0 50.7 20.8
1998 07 01 13 12.68 +11 08.4 0.748 1.295 93.2 51.6 20.8
1998 07 06 13 21.34 +11 06.4 0.770 1.282 90.6 52.5 20.9
1998 07 11 13 30.48 +10 57.4 0.792 1.269 88.2 53.2 21.0
1998 07 16 13 40.06 +10 42.3 0.811 1.255 86.0 53.9 21.0
1998 07 21 13 50.07 +10 21.8 0.829 1.242 83.9 54.5 21.1
1998 07 26 14 00.49 +09 56.4 0.845 1.228 82.0 55.0 21.1
1998 07 31 14 11.32 +09 26.7 0.859 1.214 80.3 55.5 21.1
1998 08 05 14 22.54 +08 53.2 0.871 1.200 78.6 56.0 21.1
1998 08 10 14 34.15 +08 16.4 0.881 1.186 77.1 56.5 21.1
1998 08 15 14 46.15 +07 36.4 0.888 1.172 75.8 56.9 21.1
1998 08 20 14 58.56 +06 53.7 0.894 1.158 74.5 57.4 21.1
1998 08 25 15 11.40 +06 08.4 0.897 1.144 73.4 57.9 21.1
1998 08 30 15 24.68 +05 20.8 0.899 1.130 72.4 58.4 21.1
1998 09 04 15 38.41 +04 31.1 0.898 1.117 71.5 58.9 21.1
1998 09 09 15 52.61 +03 39.6 0.896 1.104 70.7 59.4 21.1
1998 09 14 16 07.31 +02 46.3 0.892 1.092 70.0 59.9 21.1
Gareth V. Williams (C) Copyright 1998 MPC M.P.E.C. 1998-H12
Read MPEC 1998-H11
Read MPEC 1998-H13
Our Web policy. Index to the CBAT/MPC/ICQ pages.
