MPEC 1998-H09: 1998 HH1
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M.P.E.C. 1998-H09 Issued 1998 Apr. 20, 20:55 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 HH1
Observations:
J98H01H* C1998 04 17.20933 10 20 45.09 +10 12 58.3 19.8 V 691
J98H01H C1998 04 17.21700 10 20 50.85 +10 14 34.5 19.6 V 691
J98H01H C1998 04 17.22149 10 20 54.41 +10 15 31.9 19.4 V 691
J98H01H C1998 04 17.31475 10 22 06.20 +10 34 55.8 19.4 V 691
J98H01H C1998 04 17.32247 10 22 12.30 +10 36 32.4 19.7 V 691
J98H01H C1998 04 18.12914 10 33 30.44 +13 27 19.1 19.3 V 691
J98H01H C1998 04 18.13340 10 33 33.85 +13 28 13.1 19.5 V 691
J98H01H C1998 04 18.13753 10 33 37.26 +13 29 07.6 19.4 V 691
J98H01H C1998 04 18.22734 10 34 50.31 +13 48 16.1 19.3 V 691
J98H01H C1998 04 18.23148 10 34 53.64 +13 49 07.9 19.5 V 691
J98H01H C1998 04 19.19592 10 49 11.06 +17 15 41.1 19.9 V 691
J98H01H C1998 04 19.20008 10 49 14.74 +17 16 36.4 19.7 V 691
J98H01H C1998 04 19.20416 10 49 18.25 +17 17 28.0 19.4 V 691
Observer details:
691 Steward Observatory, Kitt Peak. Observer J. Larsen. 0.9-m Spacewatch
telescope.
Orbital elements:
1998 HH1
Epoch 1998 Apr. 17.0 TT = JDT 2450920.5 Williams
M 0.11331 (2000.0) P Q
n 0.30722778 Peri. 359.32684 -0.91968838 +0.37631854
a 2.1751827 Node 203.76533 -0.35893647 -0.92145743
e 0.5175335 Incl. 16.14520 -0.15917882 -0.09643941
P 3.21 H 23.0 G 0.15
From 13 observations 1998 Apr. 17-19.
Ephemeris:
1998 HH1 a,e,i = 2.18, 0.52, 16 q = 1.0495
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
1998 04 17 10 17.99 +09 30.0 0.075 1.049 126.1 50.6 19.4
1998 04 18 10 31.63 +13 00.3 0.073 1.050 126.9 49.9 19.3
1998 04 19 10 46.22 +16 34.1 0.072 1.050 127.5 49.4 19.2
1998 04 20 11 01.71 +20 07.1 0.072 1.050 127.8 49.1 19.2
1998 04 21 11 18.02 +23 34.3 0.072 1.051 128.0 48.9 19.2
1998 04 22 11 35.02 +26 51.2 0.073 1.051 127.8 49.0 19.3
1998 04 23 11 52.56 +29 53.6 0.074 1.052 127.5 49.3 19.3
1998 04 24 12 10.41 +32 38.6 0.076 1.053 126.9 49.8 19.4
1998 04 25 12 28.36 +35 04.3 0.079 1.054 126.2 50.3 19.5
1998 04 26 12 46.17 +37 09.9 0.081 1.056 125.5 50.9 19.6
1998 04 27 13 03.62 +38 55.9 0.085 1.057 124.6 51.6 19.7
1998 04 28 13 20.51 +40 23.3 0.088 1.058 123.8 52.2 19.8
1998 04 29 13 36.68 +41 34.0 0.092 1.060 123.0 52.8 19.9
1998 04 30 13 52.01 +42 29.7 0.096 1.062 122.2 53.4 20.0
1998 05 01 14 06.43 +43 12.6 0.101 1.064 121.5 53.8 20.1
1998 05 02 14 19.90 +43 44.4 0.105 1.066 120.9 54.2 20.2
1998 05 03 14 32.42 +44 07.0 0.110 1.068 120.3 54.6 20.3
1998 05 04 14 44.00 +44 22.0 0.115 1.070 119.8 54.9 20.5
1998 05 05 14 54.69 +44 30.7 0.120 1.072 119.3 55.1 20.6
1998 05 06 15 04.53 +44 34.1 0.125 1.075 118.9 55.2 20.7
1998 05 07 15 13.58 +44 33.3 0.131 1.078 118.6 55.3 20.8
1998 05 08 15 21.90 +44 29.1 0.136 1.080 118.3 55.3 20.9
1998 05 09 15 29.55 +44 22.1 0.142 1.083 118.1 55.3 20.9
1998 05 10 15 36.58 +44 12.8 0.147 1.086 117.9 55.2 21.0
1998 05 11 15 43.04 +44 01.7 0.153 1.089 117.8 55.1 21.1
1998 05 12 15 48.99 +43 49.0 0.158 1.093 117.7 55.0 21.2
1998 05 13 15 54.47 +43 35.1 0.164 1.096 117.6 54.8 21.3
1998 05 14 15 59.53 +43 20.2 0.170 1.100 117.6 54.6 21.3
1998 05 15 16 04.19 +43 04.4 0.176 1.103 117.5 54.3 21.4
1998 05 16 16 08.50 +42 47.9 0.182 1.107 117.6 54.1 21.5
1998 05 17 16 12.48 +42 30.8 0.187 1.111 117.6 53.8 21.6
Gareth V. Williams (C) Copyright 1998 MPC M.P.E.C. 1998-H09
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