MPEC 1999-J21 : 1998 HL151
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M.P.E.C. 1999-J21 Issued 1999 May 7, 17:09 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
1998 HL151
Observations:
J98HF1L*1C1998 04 29.26051 12 59 28.83 -06 38 00.9 23.5 R 568
J98HF1L 1C1998 04 29.32553 12 59 28.52 -06 37 59.5 23.5 R 568
J98HF1L 1C1998 04 29.38753 12 59 28.23 -06 37 57.8 23.5 R 568
J98HF1L 1C1998 05 02.30459 12 59 14.51 -06 36 55.6 23.8 R 568
J98HF1L 1C1998 05 02.31623 12 59 14.43 -06 36 55.5 23.8 R 568
J98HF1L 1C1998 05 02.32787 12 59 14.41 -06 36 55.3 23.8 R 568
J98HF1L 1C1998 05 22.35851 12 57 52.51 -06 31 01.8 23.8 R 568
J98HF1L 1C1998 05 22.37794 12 57 52.41 -06 31 01.7 23.8 R 568
J98HF1L 1C1998 05 22.38956 12 57 52.39 -06 31 01.6 23.8 R 568
J98HF1L 1C1999 03 16.61148 13 07 19.03 -08 09 25.9 23.1 R 568
J98HF1L 1C1999 03 16.64553 13 07 18.85 -08 09 25.5 23.1 R 568
J98HF1L 1C1999 04 08.50980 13 05 22.36 -08 00 43.9 23.2 R 568
J98HF1L 1C1999 04 08.53343 13 05 22.24 -08 00 43.4 23.2 R 568
Observer details:
568 Mauna Kea. Observers D. Jewitt, J. Luu, C. Trujillo, D. Tholen.
Measurer C. Trujillo. 2.2-m University of Hawaii reflector + CCD.
Orbital elements:
1998 HL151
Epoch 1999 Aug. 10.0 TT = JDT 2451400.5 Marsden
M 46.32778 (2000.0) P Q
n 0.00381855 Peri. 128.34235 -0.79003262 -0.59855992
a 40.5387534 Node 16.34896 +0.30198382 -0.56813348
e 0.0881262 Incl. 28.09659 +0.53352998 -0.56475691
P 258 H 8.1 G 0.15 U 6
Residuals in seconds of arc
980429 568 0.1- 0.2- 980502 568 0.2+ 0.0 990316 568 0.1- 0.2-
980429 568 0.1- 0.2- 980522 568 0.2+ 0.2+ 990408 568 0.0 0.1+
980429 568 0.1+ 0.1+ 980522 568 0.2- 0.0 990408 568 0.1+ 0.0
980502 568 0.1+ 0.2+ 980522 568 0.1+ 0.1-
980502 568 0.3- 0.0 990316 568 0.1+ 0.1+
Ephemeris:
1998 HL151 a,e,i = 40.54, 0.09, 28 q = 36.966
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
1999 05 02 13 03.39 -07 51.6 37.307 38.233 156.4 0.6 24.0
1999 05 12 13 02.64 -07 48.2 37.388 38.235 146.5 0.8 24.0
1999 05 22 13 01.99 -07 45.3 37.493 38.237 136.7 1.0 24.0
1999 06 01 13 01.46 -07 43.1 37.620 38.239 127.0 1.2 24.1
1999 06 11 13 01.06 -07 41.7 37.764 38.241 117.3 1.4 24.1
1999 06 21 13 00.80 -07 41.1 37.921 38.243 107.7 1.5 24.1
1999 07 01 13 00.71 -07 41.5 38.087 38.245 98.2 1.5 24.1
1999 07 11 13 00.77 -07 42.9 38.257 38.246 88.7 1.5 24.1
1999 07 21 13 00.99 -07 45.2 38.426 38.248 79.2 1.5 24.1
1999 07 31 13 01.36 -07 48.5 38.590 38.250 69.7 1.4 24.1
1999 08 10 13 01.88 -07 52.7 38.744 38.252 60.3 1.3 24.1
1999 08 20 13 02.53 -07 57.7 38.884 38.254 50.9 1.2 24.1
1999 08 30 13 03.30 -08 03.5 39.007 38.256 41.5 1.0 24.1
1999 09 09 13 04.16 -08 09.9 39.108 38.258 32.0 0.8 24.1
Brian G. Marsden (C) Copyright 1999 MPC M.P.E.C. 1999-J21
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