MPEC 1999-K18: 1999 HD12
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M.P.E.C. 1999-K18 Issued 1999 May 20, 22:06 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 HD12
Observations:
J99H12D* C1999 04 17.15461 12 31 54.80 -01 03 07.9 22.9 R 695
J99H12D C1999 04 17.21911 12 31 54.08 -01 03 01.5 695
J99H12D C1999 04 17.29920 12 31 53.13 -01 02 56.0 695
J99H12D C1999 04 18.18971 12 31 42.91 -01 01 39.8 695
J99H12D C1999 05 05.86823 12 28 43.71 -00 39 31.4 950
J99H12D C1999 05 05.92947 12 28 43.16 -00 39 28.4 950
J99H12D C1999 05 05.99064 12 28 42.59 -00 39 24.4 950
Observer details:
695 Kitt Peak. Observers R. L. Millis, J. L. Elliot, M. J. Holman, R. M.
Wagner, K. A. Falinski. Measurers M. W. Buie, R. L. Millis, J. L. Elliot,
K. A. Falinski. 4-m telescope + CCD.
950 La Palma. Observers M. Holman, K. Aksnes, T. Grav, N. Haug. Measurers
M. Holman, T. Grav. 2.56-m telescope + CCD.
Orbital elements:
1999 HD12
Eccentricity assumed
Epoch 1999 Apr. 12.0 TT = JDT 2451280.5 Marsden
M 0.07380 (2000.0) P Q
n 0.01606523 Peri. 12.23820 -0.98717053 +0.15941974
a 15.5552919 Node 176.89304 -0.15683664 -0.95765463
e 0.1673151 Incl. 9.48005 -0.02994351 -0.23975602
P 61.4 H 12.1 G 0.15
From 7 observations 1999 Apr. 17-May 5.
Ephemeris:
1999 HD12 a,e,i = 15.56, 0.17, 9 q = 12.953
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
1999 05 12 12 27.91 -00 33.5 12.210 12.953 135.7 3.1 23.4
1999 05 22 12 26.87 -00 25.8 12.335 12.953 125.8 3.6 23.5
1999 06 01 12 26.25 -00 21.0 12.476 12.953 116.0 4.0 23.5
1999 06 11 12 26.07 -00 19.1 12.630 12.953 106.4 4.3 23.6
1999 06 21 12 26.34 -00 20.4 12.791 12.953 96.9 4.5 23.6
1999 07 01 12 27.07 -00 24.6 12.956 12.954 87.6 4.5 23.6
1999 07 11 12 28.23 -00 31.6 13.120 12.954 78.4 4.4 23.6
1999 07 21 12 29.81 -00 41.3 13.279 12.954 69.3 4.2 23.7
1999 07 31 12 31.78 -00 53.4 13.428 12.955 60.3 3.9 23.7
1999 08 10 12 34.10 -01 07.5 13.564 12.955 51.3 3.5 23.7
1999 08 20 12 36.72 -01 23.4 13.684 12.955 42.5 3.0 23.7
1999 08 30 12 39.60 -01 40.8 13.785 12.956 33.6 2.5 23.6
Brian G. Marsden (C) Copyright 1999 MPC M.P.E.C. 1999-K18
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