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MPEC 2011-R20 : COMET C/2011 R1 (MCNAUGHT)

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M.P.E.C. 2011-R20                                Issued 2011 Sept. 5, 16:13 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 R1 (MCNAUGHT)

Observations:
    CK11R010 QC2011 09 03.71539 03 02 39.74 -15 10 18.8          16.5 TrER020E12
    CK11R010 QC2011 09 03.72404 03 02 39.56 -15 10 25.8          16.8 TrER020E12
    CK11R010 QC2011 09 03.73297 03 02 39.39 -15 10 33.2          16.6 TrER020E12
    CK11R010 QC2011 09 03.74359 03 02 39.19 -15 10 41.9          16.7 TrER020E12
    CK11R010 QC2011 09 03.80113 03 02 38.06 -15 11 29.1          16.7 TrER020E12
    CK11R010 KC2011 09 04.05130 03 02 33.42 -15 14 56.8          17.2 TuER020595
    CK11R010 KC2011 09 04.06034 03 02 33.22 -15 15 04.4          17.3 TuER020595
    CK11R010 KC2011 09 04.28697 03 02 28.92 -15 18 08.6          17.0 TwER020I20
    CK11R010 KC2011 09 04.30799 03 02 28.55 -15 18 25.8          17.1 TwER020I20
    CK11R010 KC2011 09 04.32900 03 02 28.09 -15 18 43.5          16.9 TwER020I20
    CK11R010  C2011 09 04.55700 03 02 23.74 -15 21 51.4          17.0 ToER020474
    CK11R010  C2011 09 04.55804 03 02 23.72 -15 21 52.4          17.0 ToER020474
    CK11R010  C2011 09 04.56441 03 02 23.57 -15 21 57.6          16.8 ToER020474
    CK11R010 QC2011 09 04.68351 03 02 21.24 -15 23 36.9          16.6 TrER020E12
    CK11R010 QC2011 09 04.68692 03 02 21.16 -15 23 39.6          16.6 TrER020E12
    CK11R010 `C2011 09 04.76278 03 02 19.65 -15 24 42.5          16.7 TuER020D90
    CK11R010 `C2011 09 04.76914 03 02 19.52 -15 24 47.8          16.6 TuER020D90
    CK11R010 `C2011 09 04.77546 03 02 19.40 -15 24 52.8          16.7 TuER020D90
    CK11R010 `C2011 09 04.78166 03 02 19.26 -15 24 58.0          16.7 TuER020D90
    CK11R010 `C2011 09 04.78793 03 02 19.14 -15 25 03.2          16.5 TuER020D90
    CK11R010 QC2011 09 04.80780 03 02 18.69 -15 25 19.9          16.3 TrER020E12
    CK11R010  C2011 09 05.04110 03 02 14.09 -15 28 36.0          16.9 TrER020B18
    CK11R010  C2011 09 05.04531 03 02 14.01 -15 28 39.4          16.9 TrER020B18
    CK11R010  C2011 09 05.04814 03 02 13.96 -15 28 41.7          16.8 TrER020B18
    CK11R010 KC2011 09 05.08892 03 02 13.19 -15 29 15.4                uER020J95
    CK11R010 KC2011 09 05.09234 03 02 13.12 -15 29 18.4                uER020J95
    CK11R010 KC2011 09 05.09596 03 02 13.04 -15 29 21.4          16.5 TuER020J95
    CK11R010 KC2011 09 05.16548 03 02 11.74 -15 30 17.6          16.6 TuER020I39
    CK11R010 KC2011 09 05.17472 03 02 11.51 -15 30 24.5          17.0 TuER020I39
    CK11R010 KC2011 09 05.20356 03 02 10.92 -15 30 48.1          16.7 TuER020I39
    CK11R010 QC2011 09 05.61905 03 02 02.44 -15 36 35.1          16.6 TrER020E12
    CK11R010 QC2011 09 05.62184 03 02 02.38 -15 36 37.3          16.6 TrER020E12

Observer details:
474 Mount John Observatory, Lake Tekapo.  Observers A. C. Gilmore,
    P. M. Kilmartin.  Measurer P. M. Kilmartin.  1.0-m f/7.7 reflector + CCD.
595 Farra d'Isonzo.  Observer E. Pettarin.  0.40-m f/4.5 reflector + CCD.
B18 Terskol.  Observers M. Andreev, A. Sergeev, N. Parakhin, V. Kozlov.
    Measurer M. Andreev.  0.6-m f/12.8 Cassegrain + CCD.
D90 RAS Observatory, Moorook.  Observer K. Hills.  0.41-m f/9 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.
I20 Rio Cuarto.  Observer F. D. Mazzone.  0.20-m f/4 Schmidt-Newtonian + CCD.
I39 Observatorio Cruz del Sur, San Justo.  Observer A. Chapman.  Measurers
    A. Chapman, N. Diaz.  0.20-m f/4 reflector + CCD.
J95 Great Shefford.  Observer P. Birtwhistle.  0.40-m f/6.0 Schmidt-Cassegrain
    + CCD.

Orbital elements:
    C/2011 R1 (McNaught)
T 2012 Nov. 13.23541 TT                                 MPC
q   2.6897310            (2000.0)            P               Q
                   Peri.  296.64748     -0.07834397     -0.79787381
                   Node   221.55985     -0.21887742     -0.57115987
e   1.0            Incl.  115.71280     -0.97260213     +0.19280505
From 32 observations 2011 Sept. 3-5.

Ephemeris:
    C/2011 R1 (McNaught)
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase   m1    m2
2011 08 06    03 05 18.6 -09 33 02   5.1095  5.2439    92.0    11.1  17.2
...
2011 08 21    03 05 24.0 -12 14 45   4.7710  5.1327   105.4    11.0  17.0
...
2011 08 29    03 04 09.9 -13 54 06   4.6006  5.0735   112.5    10.6  16.9
...
2011 09 04    03 02 34.4 -15 14 12   4.4797  5.0291   117.7    10.2  16.8
2011 09 05    03 02 14.9 -15 27 59   4.4602  5.0217   118.6    10.2  16.8
2011 09 06    03 01 54.5 -15 41 53   4.4410  5.0143   119.5    10.1  16.7
...
2011 09 12    02 59 29.7 -17 07 34   4.3301  4.9699   124.5     9.6  16.6
...
2011 09 20    02 55 16.1 -19 06 55   4.1963  4.9108   130.7     8.9  16.5
...
2011 10 05    02 44 08.7 -22 58 17   3.9966  4.8002   139.4     7.8  16.3

Gareth V. Williams           (C) Copyright 2011 MPC           M.P.E.C. 2011-R20

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