MPEC 1998-J02 : 1998 HT31
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M.P.E.C. 1998-J02 Issued 1998 May 1, 16:56 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 HT31
Observations:
J98H31T* C1998 04 29.57444 14 40 49.32 -08 25 45.7 16.5 V 566
J98H31T C1998 04 29.59469 14 40 53.61 -08 23 48.6 16.4 V 566
J98H31T C1998 04 29.61918 14 40 58.90 -08 21 26.3 16.7 V 566
J98H31T C1998 04 30.08047 14 42 54.52 -07 35 37.0 16.8 V 046
J98H31T C1998 04 30.08145 14 42 54.75 -07 35 30.7 046
J98H31T C1998 04 30.08243 14 42 55.00 -07 35 24.6 046
J98H31T C1998 04 30.08314 14 42 55.14 -07 35 20.1 046
J98H31T C1998 04 30.10703 14 43 00.76 -07 32 42.9 106
J98H31T C1998 04 30.11312 14 43 02.21 -07 32 03.3 106
J98H31T C1998 04 30.11484 14 43 02.70 -07 31 53.4 106
J98H31T C1998 04 30.33317 14 44 07.40 -07 07 42.5 16.3 V 566
J98H31T C1998 04 30.35411 14 44 12.44 -07 05 23.5 16.3 V 566
J98H31T C1998 04 30.37438 14 44 17.29 -07 03 08.2 16.4 V 566
J98H31T C1998 04 30.55265 14 45 00.45 -06 42 45.4 16.7 V 566
J98H31T C1998 04 30.57263 14 45 05.53 -06 40 25.1 16.4 V 566
J98H31T C1998 04 30.59326 14 45 10.90 -06 37 59.2 16.6 V 566
J98H31T C1998 04 30.81803 14 46 24.89 -06 11 34.2 16.3 V 046
J98H31T C1998 04 30.81874 14 46 25.16 -06 11 27.8 046
J98H31T C1998 04 30.82013 14 46 25.44 -06 11 17.9 046
J98H31T C1998 04 30.82081 14 46 25.66 -06 11 13.2 046
J98H31T C1998 04 30.82157 14 46 25.86 -06 11 07.8 046
J98H31T C1998 04 30.84155 14 46 32.68 -06 08 28.8 620
J98H31T C1998 04 30.84479 14 46 33.58 -06 08 05.0 620
J98H31T C1998 04 30.84688 14 46 34.17 -06 07 49.7 620
J98H31T C1998 04 30.84965 14 46 34.98 -06 07 28.4 16.2 R 620
J98H31T C1998 04 30.85475 14 46 36.42 -06 06 51.4 16.2 R 620
J98H31T C1998 04 30.86343 14 46 38.79 -06 05 46.3 16.3 R 620
J98H31T C1998 04 30.87731 14 46 41.43 -06 04 16.1 557
J98H31T C1998 04 30.87860 14 46 41.80 -06 04 06.5 557
J98H31T C1998 04 30.87988 14 46 42.15 -06 03 56.8 557
J98H31T C1998 04 30.88117 14 46 42.51 -06 03 47.0 557
J98H31T C1998 04 30.88245 14 46 42.86 -06 03 37.6 557
J98H31T C1998 04 30.88374 14 46 43.22 -06 03 28.1 16.2 V 557
J98H31T C1998 05 01.04395 14 47 28.37 -05 43 04.4 16.5 V 046
J98H31T C1998 05 01.04470 14 47 28.60 -05 42 58.3 046
J98H31T C1998 05 01.04538 14 47 28.79 -05 42 53.3 046
J98H31T C1998 05 01.09243 14 47 47.45 -05 34 53.8 16.5 R 860
J98H31T C1998 05 01.09458 14 47 48.06 -05 34 36.2 16.5 R 860
J98H31T C1998 05 01.09660 14 47 48.68 -05 34 20.6 16.8 R 860
J98H31T C1998 05 01.24653 14 48 38.39 -05 15 55.8 670
J98H31T C1998 05 01.25347 14 48 40.51 -05 14 59.3 16.7 V 670
J98H31T C1998 05 01.26042 14 48 42.58 -05 14 03.1 670
J98H31T C1998 05 01.26266 14 48 41.81 -05 13 53.5 16.0 V 713
J98H31T C1998 05 01.27222 14 48 46.08 -05 12 26.8 670
J98H31T C1998 05 01.27899 14 48 46.64 -05 11 39.9 16.0 V 713
J98H31T C1998 05 01.30020 14 48 52.95 -05 08 45.2 16.1 V 713
J98H31T C1998 05 01.30729 14 48 55.06 -05 07 47.2 15.9 V 713
J98H31T C1998 05 01.32674 14 49 00.92 -05 05 05.4 16.0 V 713
J98H31T C1998 05 01.33916 14 49 09.88 -05 02 53.3 16.2 V 566
J98H31T C1998 05 01.34476 14 49 06.35 -05 02 35.6 16.0 V 713
J98H31T C1998 05 01.35719 14 49 10.02 -05 00 53.4 15.7 V 713
J98H31T C1998 05 01.35955 14 49 16.04 -05 00 04.4 16.2 V 566
J98H31T C1998 05 01.37953 14 49 22.02 -04 57 17.5 16.3 V 566
Observer details:
046 Klet. Observers J. Ticha, M. Tichy, Z. Moravec. Measurer M. Tichy.
0.57-m f/5.2 reflector + CCD.
106 Crni Vrh. Observers H. Mikuz, J. Skvarc. 0.36-m f/6.7 Schmidt-Cassegrain
+ CCD.
557 Ondrejov. Observer P. Pravec. 0.65-m f/3.6 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.
620 Observatorio Astronomico de Mallorca. Observers A. Lopez, R. Pacheco.
0.30-m f/3.3 Schmidt-Cassegrain + CCD.
670 Camarillo. Observer J. E. Rogers. 0.25-m Schmidt-Cassegrain + CCD.
713 Thornton. Observer R. A. Koff. 0.20-m f/5.7 Schmidt-Cassegrain + CCD.
860 Valinhos. Observer P. R. Holvorcem. 0.20-m f/3.3 reflector + CCD.
Orbital elements:
1998 HT31 PHA 0.034
Epoch 1998 Apr. 17.0 TT = JDT 2450920.5 Williams
M 344.08725 (2000.0) P Q
n 0.24795675 Peri. 80.41295 +0.40795829 +0.91061417
a 2.5092972 Node 213.90614 -0.87718518 +0.37089116
e 0.6925392 Incl. 6.79161 -0.25321175 +0.18226788
P 3.97 H 21.0 G 0.15
From 53 observations 1998 Apr. 29-May 1.
Ephemeris:
1998 HT31 a,e,i = 2.51, 0.69, 7 q = 0.7715
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
1998 04 27 14 32.84 -11 40.5 0.128 1.134 175.6 3.9 17.2
1998 04 28 14 35.56 -10 35.0 0.118 1.124 175.0 4.5 17.0
1998 04 29 14 38.77 -09 17.0 0.108 1.114 173.9 5.5 16.8
1998 04 30 14 42.61 -07 42.9 0.097 1.104 172.2 7.1 16.7
1998 05 01 14 47.27 -05 47.5 0.088 1.094 170.1 9.1 16.5
1998 05 02 14 53.07 -03 23.3 0.078 1.084 167.4 11.7 16.3
1998 05 03 15 00.43 -00 19.3 0.068 1.074 163.9 15.1 16.2
1998 05 04 15 10.06 +03 41.1 0.059 1.064 159.4 19.5 16.0
1998 05 05 15 23.16 +09 02.7 0.051 1.054 153.3 25.4 15.8
1998 05 06 15 41.82 +16 20.0 0.043 1.045 145.0 33.7 15.7
1998 05 07 16 10.03 +26 09.4 0.037 1.035 133.4 45.1 15.6
1998 05 08 16 55.56 +38 26.4 0.033 1.025 118.2 60.2 15.8
1998 05 09 18 11.67 +50 45.3 0.032 1.016 100.4 77.8 16.3
1998 05 10 20 03.59 +58 03.7 0.034 1.006 83.2 94.8 17.1
1998 05 11 21 53.87 +58 11.1 0.039 0.997 69.3 108.6 18.0
1998 05 12 23 07.68 +54 38.6 0.045 0.988 59.1 118.6 19.0
1998 05 13 23 51.87 +50 35.5 0.053 0.978 52.0 125.6 19.9
1998 05 14 00 19.45 +47 02.5 0.062 0.969 46.9 130.4 20.6
1998 05 15 00 37.86 +44 07.7 0.071 0.960 43.3 133.8 21.3
1998 05 16 00 50.93 +41 45.6 0.080 0.952 40.7 136.1 21.8
1998 05 17 01 00.68 +39 49.3 0.090 0.943 38.8 137.7 22.2
Gareth V. Williams (C) Copyright 1998 MPC M.P.E.C. 1998-J02
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