• Processing (Info)

    • MPEC 2011-O42 : COMET 45P/HONDA-MRKOS-PAJDUSAKOVA

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    M.P.E.C. 2011-O42                                Issued 2011 July 27, 23:21 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 https://www.minorplanetcenter.net/    ISSN 1523-6714

                       COMET 45P/HONDA-MRKOS-PAJDUSAKOVA

Observations:
0045P        KC2011 07 05.05734 21 38 06.62 -19 17 36.2          18.0 NuEO042958
0045P        KC2011 07 08.04752 21 40 20.96 -19 38 43.0          17.4 NuEO042958
0045P        KC2011 07 08.05897 21 40 21.44 -19 38 48.1          17.6 NuEO042958
0045P        KC2011 07 22.12575 21 51 12.25 -22 55 29.1          16.6 NuEO042958
0045P        KC2011 07 23.01176 21 52 00.42 -23 16 47.3          15.5 NuEO042958
0045P        KC2011 07 23.02325 21 52 00.94 -23 17 04.9          15.7 NuEO042958
0045P        KC2011 07 23.03432 21 52 01.46 -23 17 21.6          15.7 NuEO042958
0045P         C2011 07 26.59175 21 55 31.81 -25 01 52.2          16.0 TrEO042E94
0045P         C2011 07 26.60652 21 55 32.55 -25 02 22.9          15.2 TrEO042E94
0045P         C2011 07 26.61486 21 55 33.08 -25 02 39.7          15.9 TrEO042E94
0045P         C2011 07 27.27230 21 56 18.32 -25 26 53.3          15.8 TuEO042H45
0045P         C2011 07 27.27344 21 56 18.39 -25 26 55.7          15.9 TuEO042H45
0045P         C2011 07 27.27535 21 56 18.49 -25 27 00.0          15.8 TuEO042H45
0045P         C2011 07 27.27969 21 56 18.76 -25 27 09.9          15.7 TuEO042H45
0045P         C2011 07 27.28131 21 56 18.84 -25 27 13.5          15.7 TuEO042H45
0045P         C2011 07 27.28295 21 56 18.95 -25 27 17.3          15.7 TuEO042H45
0045P         C2011 07 27.28476 21 56 19.05 -25 27 21.4          15.7 TuEO042H45
0045P        %C2011 07 27.32257 21 56 21.67 -25 28 45.2          15.0 NoEO042H06
0045P        %C2011 07 27.32442 21 56 21.78 -25 28 49.4          15.0 NoEO042H06
0045P        %C2011 07 27.32626 21 56 21.90 -25 28 53.5          15.0 NoEO042H06
0045P         C2011 07 27.52642 21 56 36.73 -25 35 52.9          15.5 NuEO042E07
0045P         C2011 07 27.52816 21 56 36.83 -25 35 57.0          15.9 NuEO042E07
0045P        $C2011 07 27.55667 21 56 36.69 -25 37 31.6          16.2 NoEO042F65
0045P        $C2011 07 27.55753 21 56 36.75 -25 37 33.7          16.0 NoEO042F65
0045P        $C2011 07 27.55836 21 56 36.79 -25 37 35.5          16.3 NoEO042F65
0045P        $C2011 07 27.55917 21 56 36.83 -25 37 37.2          16.3 NoEO042F65
0045P        $C2011 07 27.56006 21 56 36.89 -25 37 39.3          16.3 NoEO042F65
0045P        $C2011 07 27.56094 21 56 36.94 -25 37 41.4          16.2 NoEO042F65
0045P        QC2011 07 27.74866 21 56 49.96 -25 44 30.9          14.3 TrEO042E12
0045P        QC2011 07 27.75134 21 56 50.13 -25 44 37.2          14.3 TrEO042E12

Observer details:
958 Observatoire de Dax.  Observer P. Dupouy.  0.20-m f/3.3 Schmidt-Cassegrain
    + CCD, 0.32-m f/6 reflector + CCD.
E07 Murrumbateman.  Observer D. Herald.  0.40-m f/10 Schmidt-Cassegrain + CCD.
E12 Siding Spring Survey.  Observer R. H. McNaught.  0.5-m Uppsala Schmidt
    + CCD.
E94 Possum Observatory, Gisborne.  Observer J. Drummond.  0.35-m f/10
    Schmidt-Cassegrain + CCD.
F65 Haleakala-Faulkes Telescope North.  Observers N. Howes, H. Blyth,
    G. Sostero, E. Guido.  2.0-m f/10.0 Ritchey-Chretien + CCD.
H06 RAS Observatory, Mayhill.  Observers E. Guido, G. Sostero, N. Howes.
    0.51-m f/6.9 reflector + CCD.
H45 Arkansas Sky Obs., Petit Jean Mountain South.  Observer P. C. Sherrod.
    0.51-m f/4.3 astrograph + CCD.

Orbital elements:
  45P/Honda-Mrkos-Pajdusakova
Epoch 2011 Oct. 6.0 TT = JDT 2455840.5
T 2011 Sept. 28.78102 TT                                MPC
q   0.5296166            (2000.0)            P               Q
n   0.18767610     Peri.  326.24913     +0.56838822     -0.81941306
a   3.0213201      Node    89.00639     +0.77030881     +0.49832754
e   0.8247069      Incl.    4.25258     +0.28906604     +0.28325235
P   5.25
From 181 observations 2001 Apr. 4-2011 July 27, mean residual 0".79.  Non-
   gravitational parameters A1 = -1.00 +/- 0.08, A2 = -0.0417 +/- 0.0001, A3 =
   +0.0308 +/- 0.0639.

Ephemeris:
  45P/Honda-Mrkos-Pajdusakova
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase   m1    m2
2011 06 27    21 31 49.2 -18 40 13   0.7959  1.6794   135.5    25.1  17.5  21.3
...
2011 07 12    21 43 16.4 -20 14 36   0.5281  1.4887   147.3    21.6  15.6  20.0
...
2011 07 20    21 49 24.9 -22 10 05   0.3969  1.3827   153.5    19.2  14.3  19.2
...
2011 07 26    21 54 53.9 -24 41 59   0.3038  1.3013   157.3    17.5  13.2  18.4
2011 07 27    21 55 59.1 -25 16 26   0.2887  1.2876   157.8    17.4  13.0  18.3
2011 07 28    21 57 09.1 -25 54 31   0.2738  1.2738   158.2    17.2  12.8  18.1
...
2011 08 03    22 07 13.7 -31 40 39   0.1872  1.1902   157.7    18.9  11.4  17.2
...
2011 08 11    23 06 48.8 -55 09 47   0.08613 1.0767   135.4    41.4   8.8  16.0
...
2011 08 26    09 18 33.1 -05 58 46   0.1642  0.8609    22.1   153.8   8.3  24.5

Gareth V. Williams           (C) Copyright 2011 MPC           M.P.E.C. 2011-O42

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