MPEC 2009-J02 : 1998 HN3
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M.P.E.C. 2009-J02 Issued 2009 May 1, 14:02 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.
Prepared using the Tamkin Foundation Computer Network
MPC@CFA.HARVARD.EDU
URL http://www.cfa.harvard.edu/iau/mpc.html ISSN 1523-6714
1998 HN3
Revision to MPEC 1998-H22
Additional Observations:
J98H03N C2009 04 30.25461 13 11 13.38 -00 31 54.6 20.3 V EJ002G96
J98H03N C2009 04 30.26530 13 11 12.48 -00 31 53.8 20.4 V EJ002G96
J98H03N C2009 04 30.27591 13 11 11.58 -00 31 53.1 20.2 V EJ002G96
J98H03N C2009 04 30.28662 13 11 10.71 -00 31 52.1 20.4 V EJ002G96
J98H03N C2009 04 30.33384 13 11 06.79 -00 31 48.2 20.3 V EJ002G96
J98H03N C2009 04 30.34323 13 11 06.00 -00 31 47.4 20.1 V EJ002G96
J98H03N C2009 04 30.35256 13 11 05.20 -00 31 46.9 20.1 V EJ002G96
J98H03N C2009 04 30.93030 13 10 19.28 -00 31 05.0 20.0 R EJ002B04
J98H03N C2009 04 30.93817 13 10 18.63 -00 31 04.4 19.8 R EJ002B04
J98H03N C2009 04 30.94603 13 10 17.98 -00 31 03.6 19.7 R EJ002B04
J98H03N C2009 05 01.28168 13 09 51.19 -00 30 39.4 20.1 V EJ002G96
J98H03N C2009 05 01.29061 13 09 50.43 -00 30 39.0 20.5 V EJ002G96
J98H03N C2009 05 01.29969 13 09 49.68 -00 30 38.3 20.4 V EJ002G96
J98H03N C2009 05 01.30878 13 09 48.92 -00 30 37.8 20.1 V EJ002G96
J98H03N C2009 05 01.31140 13 09 48.73 -00 30 37.4 20.4 V EJ002291
J98H03N C2009 05 01.31742 13 09 48.22 -00 30 37.0 20.4 V EJ002291
J98H03N C2009 05 01.32165 13 09 47.89 -00 30 36.7 20.2 V EJ002291
Observer details:
291 LPL/Spacewatch II. Observer R. S. McMillan. 1.8-m f/2.7 reflector + CCD.
B04 OAVdA, Saint-Barthelemy. Observer A. Carbognani. 0.81-m f/7.9 reflector
+ CCD.
G96 Mt. Lemmon Survey. Observer S. M. Larson. Measurers E. C. Beshore,
A. Boattini, G. J. Garradd, A. R. Gibbs, A. D. Grauer, R. E. Hill,
R. A. Kowalski, S. M. Larson, R. H. McNaught. 1.5-m reflector + CCD.
First and last observations above in comparison with prediction:
Residuals in seconds of arc (or two decimals in degrees), reference and Delta-T
090430 G96 6.49+ 3.56- 090501 291 6.45+ 3.55- MPO 57669 -14.2 day
Orbital elements:
1998 HN3 Earth MOID = 0.2373 AU
Epoch 2009 June 18.0 TT = JDT 2455000.5 MPC
M 343.82619 (2000.0) P Q
n 0.17962688 Peri. 250.64671 +0.48896488 +0.86385820
a 3.1109175 Node 49.23143 -0.72826075 +0.48068006
e 0.6173671 Incl. 9.20013 -0.48015584 +0.15065087
P 5.49 H 18.3 G 0.15 U 3
Residuals in seconds of arc
980419 691 0.8- 0.1+ 980425 691 0.4- 0.0 090430 G96 0.1- 0.1+
980419 691 0.7- 0.6+ 980425 691 0.9- 0.1+ 090430 G96 0.5- 0.1-
980419 691 0.3- 0.4+ 980426 691 0.4+ 0.4- 090430 B04 0.2+ 0.2+
980420 691 0.4+ 0.1- 980426 691 0.0 0.8- 090430 B04 0.2+ 0.2+
980420 691 0.0 0.1- 980426 691 0.2+ 0.4+ 090430 B04 0.1+ 0.5+
980420 691 0.6- 0.2+ 980502 691 0.3+ 0.4+ 090501 G96 0.3+ 0.0
980421 691 0.8+ 0.4- 980502 691 0.1- 0.4+ 090501 G96 0.1- 0.2-
980421 691 0.2+ 0.1- 980502 691 0.5- 0.2- 090501 G96 0.1- 0.1-
980421 691 0.6+ 0.4- 090430 G96 0.0 0.1- 090501 G96 0.2- 0.2-
980422 691 0.5+ 0.1- 090430 G96 0.1- 0.1- 090501 291 0.1+ 0.0
980422 691 0.6+ 0.2+ 090430 G96 0.4- 0.3- 090501 291 0.1- 0.0
980422 691 0.3+ 0.2+ 090430 G96 0.0 0.1- 090501 291 0.2+ 0.0
980425 691 0.1- 0.2- 090430 G96 0.1+ 0.1+
Ephemeris:
1998 HN3 a,e,i = 3.11, 0.62, 9 q = 1.1903
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2009 04 29 13 12.91 -00 33.7 1.004 1.972 157.4 11.3 20.5
2009 05 09 13 00.09 -00 28.8 0.977 1.896 145.3 17.7 20.6
2009 05 19 12 49.63 -00 48.9 0.968 1.819 133.6 23.8 20.6
2009 05 29 12 42.75 -01 36.6 0.973 1.744 122.8 29.3 20.7
2009 06 08 12 40.11 -02 51.9 0.985 1.669 113.1 34.0 20.8
2009 06 18 12 41.80 -04 33.2 1.000 1.596 104.6 38.0 20.8
2009 06 28 12 47.75 -06 38.4 1.015 1.525 97.2 41.4 20.9
2009 07 08 12 57.75 -09 05.7 1.027 1.457 91.0 44.2 20.9
2009 07 18 13 11.63 -11 52.6 1.035 1.394 85.6 46.6 20.9
2009 07 28 13 29.39 -14 56.9 1.037 1.337 81.3 48.6 20.8
2009 08 07 13 51.12 -18 14.9 1.035 1.287 77.8 50.4 20.8
2009 08 17 14 17.09 -21 41.4 1.029 1.246 75.3 51.8 20.8
2009 08 27 14 47.74 -25 08.6 1.021 1.216 73.5 52.8 20.7
2009 09 06 15 23.50 -28 24.5 1.014 1.197 72.6 53.5 20.7
2009 09 16 16 04.61 -31 13.3 1.011 1.190 72.4 53.6 20.7
2009 09 26 16 50.80 -33 16.0 1.015 1.197 72.7 53.1 20.7
2009 10 06 17 40.77 -34 14.3 1.031 1.216 73.5 52.1 20.7
2009 10 16 18 32.27 -33 56.8 1.061 1.246 74.5 50.4 20.8
2009 10 26 19 22.65 -32 24.1 1.108 1.287 75.3 48.3 20.9
2009 11 05 20 09.70 -29 49.1 1.173 1.337 75.8 46.0 21.0
2009 11 15 20 52.28 -26 31.1 1.256 1.394 75.7 43.5 21.2
2009 11 25 21 30.28 -22 49.1 1.356 1.457 75.0 40.9 21.4
2009 12 05 22 04.11 -18 58.7 1.472 1.524 73.7 38.4 21.6
2009 12 15 22 34.44 -15 10.2 1.602 1.595 71.7 35.9 21.8
2009 12 25 23 01.95 -11 29.6 1.743 1.668 69.1 33.4 22.0
Gareth V. Williams (C) Copyright 2009 MPC M.P.E.C. 2009-J02
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