MPEC 2009-O56 : COMET C/2009 O4 (HILL)
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M.P.E.C. 2009-O56 Issued 2009 July 31, 15:29 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
COMET C/2009 O4 (HILL)
Observations:
CK09O040 C2009 07 30.37424 00 33 09.91 +07 38 01.8 EO056703
CK09O040 C2009 07 30.38051 00 33 09.82 +07 37 53.4 EO056703
CK09O040 C2009 07 30.38689 00 33 09.76 +07 37 47.4 16.3 T EO056703
CK09O040 C2009 07 30.39339 00 33 09.67 +07 37 40.0 EO056703
CK09O040 C2009 07 30.44821 00 33 08.89 +07 36 36.9 EO056703
CK09O040 C2009 07 30.44919 00 33 08.87 +07 36 34.9 16.4 T EO056703
CK09O040 C2009 07 30.45018 00 33 08.82 +07 36 34.0 EO056703
CK09O040 C2009 07 30.45118 00 33 08.89 +07 36 33.0 EO056703
CK09O040 C2009 07 30.70037 00 33 05.70 +07 31 43.6 EO056900
CK09O040 C2009 07 30.70393 00 33 05.64 +07 31 39.7 EO056900
CK09O040 C2009 07 30.70678 00 33 05.58 +07 31 36.6 16.3 T EO056900
CK09O040 C2009 07 30.71106 00 33 05.53 +07 31 31.3 EO056900
CK09O040 C2009 07 30.73169 00 33 05.23 +07 31 11.3 16.1 T EO056D90
CK09O040 C2009 07 30.73830 00 33 05.14 +07 31 03.7 16.2 T EO056D90
CK09O040 C2009 07 30.74480 00 33 05.05 +07 30 56.2 16.1 T EO056D90
CK09O040 C2009 07 30.75134 00 33 04.96 +07 30 48.4 16.0 T EO056D90
CK09O040 C2009 07 30.75789 00 33 04.86 +07 30 40.9 16.1 T EO056D90
CK09O040 C2009 07 30.76449 00 33 04.75 +07 30 33.3 16.3 T EO056D90
CK09O040 C2009 07 30.77371 00 33 04.63 +07 30 18.6 EO056900
CK09O040 C2009 07 30.77870 00 33 04.56 +07 30 12.7 16.8 N EO056900
CK09O040 C2009 07 30.83917 00 33 03.65 +07 29 06.2 15.8 T EO056D90
CK09O040 C2009 07 30.84108 00 33 03.61 +07 29 04.2 EO056D90
CK09O040 C2009 07 30.84299 00 33 03.59 +07 29 02.1 EO056D90
CK09O040 C2009 07 30.84487 00 33 03.57 +07 29 00.6 EO056D90
CK09O040 C2009 07 30.94202 00 33 02.47 +07 27 01.3 17.5 T EO056198
CK09O040 C2009 07 30.94528 00 33 02.43 +07 26 57.3 17.6 T EO056198
CK09O040 C2009 07 30.94811 00 33 02.38 +07 26 54.1 17.7 T EO056198
CK09O040 C2009 07 30.95021 00 33 02.31 +07 26 51.1 17.8 T EO056198
CK09O040 C2009 07 30.95586 00 33 02.25 +07 26 44.6 17.9 T EO056198
CK09O040 C2009 07 30.96197 00 33 02.11 +07 26 38.8 17.1 T EO056B42
CK09O040 C2009 07 30.96457 00 33 02.08 +07 26 34.7 17.2 T EO056B42
CK09O040 C2009 07 30.96922 00 33 02.07 +07 26 30.7 16.9 T EO056A79
CK09O040 C2009 07 30.97254 00 33 01.99 +07 26 25.8 17.4 T EO056B42
CK09O040 C2009 07 30.97384 00 33 02.04 +07 26 24.4 16.9 T EO056B01
CK09O040 C2009 07 30.97467 00 33 02.04 +07 26 23.9 16.8 T EO056A17
CK09O040 C2009 07 30.97523 00 33 01.99 +07 26 23.6 17.2 T EO056A79
CK09O040 C2009 07 30.97538 00 33 02.02 +07 26 23.0 16.8 T EO056B01
CK09O040 C2009 07 30.97692 00 33 01.99 +07 26 21.6 17.0 T EO056B01
CK09O040 C2009 07 30.97846 00 33 02.00 +07 26 18.5 17.1 T EO056B01
CK09O040 C2009 07 30.97999 00 33 01.89 +07 26 17.8 16.3 T EO056B01
CK09O040 C2009 07 30.98048 00 33 01.95 +07 26 17.1 17.6 T EO056A17
CK09O040 C2009 07 30.98153 00 33 01.89 +07 26 15.8 16.6 T EO056B01
CK09O040 C2009 07 30.98307 00 33 01.90 +07 26 13.5 16.6 T EO056B01
CK09O040 C2009 07 30.98461 00 33 01.84 +07 26 12.0 16.7 T EO056B01
CK09O040 C2009 07 30.98615 00 33 01.85 +07 26 10.5 16.5 T EO056B01
CK09O040 C2009 07 30.98668 00 33 01.87 +07 26 09.6 17.6 T EO056A17
CK09O040 C2009 07 30.98769 00 33 01.83 +07 26 08.1 16.6 T EO056B01
CK09O040 C2009 07 30.98922 00 33 01.79 +07 26 06.3 16.9 T EO056B01
CK09O040 C2009 07 30.99000 00 33 01.80 +07 26 06.4 17.2 T EO056A79
CK09O040 C2009 07 30.99075 00 33 01.79 +07 26 04.7 16.8 T EO056B01
CK09O040 C2009 07 30.99157 00 33 01.80 +07 26 03.8 17.3 T EO056A17
CK09O040 C2009 07 31.04963 00 33 00.88 +07 24 57.0 17.1 T EO056A55
CK09O040 C2009 07 31.05690 00 33 00.83 +07 24 48.6 17.0 T EO056A55
CK09O040 C2009 07 31.06419 00 33 00.72 +07 24 39.9 17.1 T EO056A55
CK09O040 C2009 07 31.07148 00 33 00.61 +07 24 31.3 17.0 T EO056A55
CK09O040 C2009 07 31.07212 00 33 00.70 +07 24 30.6 16.7 T EO056J51
CK09O040 C2009 07 31.08496 00 33 00.47 +07 24 15.9 16.5 T EO056J51
CK09O040 C2009 07 31.10118 00 33 00.24 +07 23 57.1 16.5 T EO056J51
CK09O040 C2009 07 31.21017 00 32 58.90 +07 21 47.4 18.0 T EO056H26
CK09O040 C2009 07 31.21179 00 32 58.69 +07 21 46.4 18.1 T EO056H26
CK09O040 C2009 07 31.21341 00 32 58.71 +07 21 43.8 17.5 T EO056H26
CK09O040 C2009 07 31.21502 00 32 58.73 +07 21 41.7 18.3 T EO056H26
CK09O040 C2009 07 31.32112 00 32 57.15 +07 19 38.8 16.8 T EO056854
CK09O040 C2009 07 31.32496 00 32 57.12 +07 19 33.9 17.1 T EO056854
CK09O040 C2009 07 31.32975 00 32 57.02 +07 19 28.3 16.9 T EO056854
CK09O040 C2009 07 31.33455 00 32 56.98 +07 19 22.7 17.1 T EO056854
CK09O040 C2009 07 31.34929 00 32 56.78 +07 19 04.7 18.0 T EO056H01
CK09O040 C2009 07 31.35684 00 32 56.67 +07 18 55.8 17.9 T EO056H01
CK09O040 C2009 07 31.36326 00 32 56.57 +07 18 48.3 18.0 T EO056H01
CK09O040 C2009 07 31.37177 00 32 56.44 +07 18 38.3 18.0 T EO056H01
CK09O040 C2009 07 31.37667 00 32 56.36 +07 18 32.3 18.1 T EO056H01
CK09O040 C2009 07 31.38987 00 32 56.09 +07 18 16.9 16.7 N EO056H36
CK09O040 C2009 07 31.39396 00 32 56.01 +07 18 12.1 16.9 N EO056H36
CK09O040 C2009 07 31.39781 00 32 55.95 +07 18 07.5 16.7 N EO056H36
Observer details:
198 Wildberg. Observer R. Apitzsch. 0.35-m f/4.2 reflector + CCD.
703 Catalina Sky Survey. Observer R. E. Hill. Measurers E. C. Beshore,
A. Boattini, A. R. Gibbs, A. D. Grauer, R. E. Hill, R. A. Kowalski,
S. M. Larson. 0.68-m Schmidt + CCD.
854 Sabino Canyon Observatory, Tucson. Observer J. E. McGaha. 0.36-m f/10.0
Schmidt-Cassegrain + CCD.
900 Moriyama. Observer Y. Ikari. 0.26-m f/7.0 reflector + CCD.
A17 Guidestar Observatory, Weinheim. Observers M. Emmerich, S. Melchert.
0.36-m f/6 Schmidt-Cassegrain + CCD.
A55 Osservatorio Astronomico Vallemare di Borbona. Observer V. S. Casulli.
0.40-m f/4.5 Newtonian reflector + CCD.
A79 Zvezdno Obshtestvo Observatory, Plana. Observer F. Fratev. 0.35-m f/3.4
reflector + CCD.
B01 Taunus Observatory, Frankfurt. Observers S. Karge, R. Kling. 0.6-m f/3.3
Cassegrain + CCD.
B42 Vitebsk. Observer V. Nevski. 0.3-m f/5.0 reflector + CCD.
D90 RAS Observatory, Moorook. Observers K. Hills, H. Sato. 0.25-m f/6
Ritchey-Chretien + CCD, 0.41-m f/9 Ritchey-Chretien + CCD.
H01 Magdalena Ridge Observatory, Socorro. Observer W. H. Ryan. 2.4-m f/8.9
reflector + CCD.
H26 Doc Greiner Research Observatory, Janesvillle. Observer M. Mills. 0.40-m
f/8 Schmidt-Cassegrain + CCD.
H36 Sandlot Observatory, Scranton. Observer G. Hug. 0.56-m reflector + CCD.
J51 Observatorio Atlante, Tenerife. Observer J. A. Henriquez. 0.2-m f/9
Cassegrain + CCD.
Orbital elements:
C/2009 O4 (Hill)
T 2009 Dec. 1.451 TT MPC
q 2.86118 (2000.0) P Q
Peri. 210.640 +0.850145 -0.514159
Node 173.459 +0.075039 +0.331752
e 1.0 Incl. 94.583 -0.521174 -0.790937
From 74 observations 2009 July 30-31.
Ephemeris:
C/2009 O4 (Hill)
Date TT R. A. (2000) Decl. Delta r Elong. Phase m1 m2
2009 07 28 00 33.61 +08 22.5 2.581 3.133 113.8 17.2 16.0
2009 08 07 00 30.83 +04 58.5 2.393 3.094 125.5 15.5 15.8
2009 08 17 00 25.55 +00 47.9 2.230 3.057 137.9 12.8 15.6
2009 08 27 00 17.63 -04 08.9 2.100 3.023 150.9 9.4 15.4
2009 09 06 00 07.22 -09 42.4 2.015 2.992 162.8 5.7 15.3
2009 09 16 23 54.80 -15 32.8 1.978 2.964 166.3 4.6 15.2
2009 09 26 23 41.20 -21 13.4 1.993 2.940 156.5 7.8 15.2
Brian G. Marsden (C) Copyright 2009 MPC M.P.E.C. 2009-O56
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