MPEC 2009-H28 : 2009 HC21
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M.P.E.C. 2009-H28 Issued 2009 Apr. 21, 17:42 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
2009 HC21
Observations:
K09H21C* C2009 04 20.31951 13 41 06.03 -16 27 03.2 20.1 V EH028G96
K09H21C C2009 04 20.32640 13 41 05.38 -16 26 33.3 20.1 V EH028G96
K09H21C C2009 04 20.33314 13 41 04.70 -16 26 04.0 20.4 V EH028G96
K09H21C C2009 04 20.34002 13 41 04.05 -16 25 33.9 20.1 V EH028G96
K09H21C C2009 04 20.34763 13 41 03.26 -16 25 00.4 19.9 V EH028G96
K09H21C C2009 04 20.34850 13 41 03.22 -16 24 56.0 19.8 V EH028G96
K09H21C C2009 04 20.35715 13 41 02.28 -16 24 19.2 19.4 R EH028H01
K09H21C C2009 04 20.36185 13 41 01.81 -16 23 58.8 19.4 R EH028H01
K09H21C C2009 04 20.36643 13 41 01.39 -16 23 38.9 19.3 R EH028H01
K09H21C C2009 04 20.37180 13 41 00.87 -16 23 15.4 19.4 R EH028H01
K09H21C C2009 04 20.98901 13 40 08.91 -15 38 23.2 EH028J95
K09H21C C2009 04 20.99092 13 40 08.68 -15 38 15.3 EH028J95
K09H21C C2009 04 20.99549 13 40 08.25 -15 37 54.7 19.6 R EH028J95
K09H21C C2009 04 21.19874 13 39 51.94 -15 22 52.6 20.1 V EH028G96
K09H21C C2009 04 21.20157 13 39 51.66 -15 22 39.9 19.9 V EH028G96
K09H21C C2009 04 21.20433 13 39 51.40 -15 22 28.0 19.8 V EH028G96
K09H21C C2009 04 21.20707 13 39 51.15 -15 22 15.9 19.8 V EH028G96
K09H21C C2009 04 21.30311 13 39 41.81 -15 15 11.2 19.8 R EH028651
K09H21C C2009 04 21.30422 13 39 41.68 -15 15 07.1 19.9 R EH028651
K09H21C C2009 04 21.30533 13 39 41.54 -15 15 02.2 19.9 R EH028651
Observer details:
651 Grasslands Observatory, Tucson. Observer J. E. McGaha. 0.62-m f/5.1
Newtonian reflector + CCD.
G96 Mt. Lemmon Survey. Observers A. R. Gibbs, A. Boattini. 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.
H01 Magdalena Ridge Observatory, Socorro. Observer W. H. Ryan. 2.4-m f/8.9
reflector + CCD.
J95 Great Shefford. Observer P. Birtwhistle. 0.40-m f/6.0 Schmidt-Cassegrain
+ CCD.
Orbital elements:
2009 HC21 PHA, Earth MOID = 0.0468 AU
Epoch 2009 June 18.0 TT = JDT 2455000.5 MPC
M 288.08951 (2000.0) P Q
n 0.77620029 Peri. 128.26711 +0.92277509 +0.33654808
a 1.1726098 Node 213.30749 -0.36047370 +0.92604875
e 0.1544375 Incl. 19.98443 +0.13617947 +0.17078962
P 1.27 H 21.9 G 0.15 U 8
Residuals in seconds of arc
090420 G96 0.1- 0.3- 090420 H01 0.2- 0.1+ 090421 G96 0.1- 0.1-
090420 G96 0.2+ 0.4- 090420 H01 0.1+ 0.0 090421 G96 0.0 0.3-
090420 G96 0.1- 0.4- 090420 H01 0.1+ 0.0 090421 G96 0.1+ 0.3-
090420 G96 0.2+ 0.2- 090420 J95 0.5+ 0.2+ 090421 651 0.2+ 0.8+
090420 G96 0.5- 0.1+ 090420 J95 0.2- 0.3- 090421 651 0.1- 0.1-
090420 G96 0.1+ 0.7+ 090420 J95 0.2- 0.2+ 090421 651 0.6- 0.1-
090420 H01 0.1+ 0.2+ 090421 G96 0.0 0.4-
Ephemeris:
2009 HC21 a,e,i = 1.17, 0.15, 20 q = 0.9915
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2009 04 19 13 42.99 -18 00.8 0.275 1.278 173.0 5.5 20.1
2009 04 29 13 29.09 -05 21.7 0.261 1.259 163.5 13.1 20.2
2009 05 09 13 18.37 +07 06.2 0.269 1.238 144.3 28.4 20.8
2009 05 19 13 13.04 +17 02.1 0.295 1.216 128.0 41.0 21.3
2009 05 29 13 13.57 +23 56.7 0.331 1.192 115.2 50.3 21.7
Timothy B. Spahr (C) Copyright 2009 MPC M.P.E.C. 2009-H28
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