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MPEC 2011-N31 : COMET C/2011 N2 (MCNAUGHT)

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Read MPEC 2011-N30 Read MPEC 2011-N32 

M.P.E.C. 2011-N31                                Issued 2011 July 7, 18:51 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.minorplanetcenter.net/    ISSN 1523-6714

                          COMET C/2011 N2 (MCNAUGHT)

Observations:
    CK11N020 QC2011 07 04.45870 14 02 06.24 -39 29 08.5          17.9 TrEN031E12
    CK11N020  C2011 07 04.46488 14 02 06.61 -39 29 04.2          17.8 TrEN031E12
    CK11N020  C2011 07 04.47730 14 02 07.15 -39 28 52.8          17.9 TrEN031E12
    CK11N020 QC2011 07 04.48350 14 02 07.45 -39 28 47.3                rEN031E12
    CK11N020  C2011 07 04.48970 14 02 07.69 -39 28 41.7          18.1 TrEN031E12
    CK11N020 QC2011 07 04.50695 14 02 08.61 -39 28 27.4          17.8 TrEN031E12
    CK11N020 QC2011 07 04.51080 14 02 08.79 -39 28 24.6          17.8 TrEN031E12
    CK11N020 QC2011 07 04.58102 14 02 12.25 -39 27 24.7                rEN031E12
    CK11N020 |C2011 07 05.11629 14 02 39.60 -39 19 55.4          19.5 ToEN031807
    CK11N020 |C2011 07 05.12081 14 02 39.86 -39 19 51.3          19.5 ToEN031807
    CK11N020 QC2011 07 05.34899 14 02 51.84 -39 16 41.4          17.9 TrEN031E12
    CK11N020 QC2011 07 05.35333 14 02 52.06 -39 16 37.6          18.0 TrEN031E12
    CK11N020 KC2011 07 05.40361 14 02 54.64 -39 15 55.1          18.3 ToEN031E10
    CK11N020 KC2011 07 05.40504 14 02 54.71 -39 15 53.6          18.4 ToEN031E10
    CK11N020 KC2011 07 05.40621 14 02 54.77 -39 15 52.6          18.7 ToEN031E10
    CK11N020 `C2011 07 05.45081 14 02 56.98 -39 15 15.6          18.2 TuEN031D90
    CK11N020 `C2011 07 05.45760 14 02 57.34 -39 15 09.6          18.1 TuEN031D90
    CK11N020 `C2011 07 05.47793 14 02 58.36 -39 14 52.4          18.0 TuEN031D90
    CK11N020 `C2011 07 05.48472 14 02 58.70 -39 14 46.7          18.0 TuEN031D90
    CK11N020 QC2011 07 05.51385 14 03 00.11 -39 14 22.6          17.8 TrEN031E12
    CK11N020 QC2011 07 05.52682 14 03 00.77 -39 14 11.6          17.8 TrEN031E12
    CK11N020 KC2011 07 06.04849 14 03 28.11 -39 06 56.8          18.6 TuEN031I19
    CK11N020 KC2011 07 06.05544 14 03 28.46 -39 06 50.8          18.7 TuEN031I19
    CK11N020 KC2011 07 06.05918 14 03 28.68 -39 06 47.9          18.7 TuEN031I19
    CK11N020 |C2011 07 07.02161 14 04 20.05 -38 53 28.7          19.2 ToEN031807
    CK11N020 |C2011 07 07.03042 14 04 20.52 -38 53 21.5          19.5 ToEN031807
    CK11N020 |C2011 07 07.03481 14 04 20.73 -38 53 17.7          19.3 ToEN031807
    CK11N020 QC2011 07 07.46128 14 04 43.83 -38 47 25.9          17.8 TrEN031E12
    CK11N020 QC2011 07 07.46907 14 04 44.24 -38 47 18.8          17.8 TrEN031E12

Observer details:
807 Cerro Tololo.  Observers R. Holmes, T. Linder, V. Hoette.  Measurer
    T. Linder.  0.41-m f/11 Ritchey-Chretien + CCD.
D90 RAS Observatory, Moorook.  Observer K. Hills.  0.41-m f/9 Ritchey-Chretien
    + CCD.
E10 Siding Spring-Faulkes Telescope South.  Observer R. Comp School.
    Measurers N. Howes, G. Sostero, E. Guido.  2.0-m f/10.0 Ritchey-Chretien
    + CCD.
E12 Siding Spring Survey.  Observer R. H. McNaught.  Measurers J. D. Ahern,
    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.  0.5-m Uppsala
    Schmidt + CCD.
I19 Observatorio El Gato Gris, Tanti.  Observer C. Colazo.  0.36-m f/11
    Schmidt-Cassegrain + CCD.

Orbital elements:
    C/2011 N2 (McNaught)
T 2011 Oct.  9.79551 TT                                 MPC
q   2.6962574            (2000.0)            P               Q
                   Peri.  353.29233     -0.05632860     +0.81858445
                   Node   272.27355     -0.88739228     -0.30343002
e   1.0            Incl.   34.89455     -0.45756096     +0.48769839
From 29 observations 2011 July 4-7.

Ephemeris:
    C/2011 N2 (McNaught)
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase   m1    m2
2011 06 07    13 48 07.4 -46 13 29   2.1847  2.9914   135.2    13.8  18.0
...
2011 06 22    13 53 24.6 -42 30 11   2.2123  2.9282   126.1    16.3  17.9
...
2011 06 30    13 58 34.4 -40 32 40   2.2443  2.8971   120.6    17.6  17.9
...
2011 07 06    14 03 25.7 -39 07 37   2.2754  2.8751   116.4    18.5  17.9
2011 07 07    14 04 18.9 -38 53 47   2.2811  2.8715   115.7    18.6  17.9
2011 07 08    14 05 13.3 -38 40 03   2.2870  2.8680   114.9    18.7  17.9
...
2011 07 14    14 11 05.6 -37 20 01   2.3251  2.8475   110.7    19.5  17.9
...
2011 07 22    14 19 57.9 -35 40 07   2.3831  2.8220   105.0    20.4  17.9
...
2011 08 06    14 39 22.6 -32 55 10   2.5100  2.7800    94.5    21.3  17.9

Gareth V. Williams           (C) Copyright 2011 MPC           M.P.E.C. 2011-N31

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