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MPEC 1999-T42 : COMET C/1999 T1 (MCNAUGHT-HARTLEY)

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M.P.E.C. 1999-T42                                Issued 1999 Oct. 11, 16:10 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.

             BMARSDEN@CFA.HARVARD.EDU or GWILLIAMS@CFA.HARVARD.EDU
          URL http://cfa-www.harvard.edu/iau/mpc.html  ISSN 1523-6714

                      COMET C/1999 T1 (MCNAUGHT-HARTLEY)

Observations:
    CJ99T010   1999 10 07.63654 02 04 29.37 -39 08 08.0          15   T      413
    CJ99T010   1999 10 07.68168 02 04 27.46 -39 08 31.1                      413
    CJ99T010  C1999 10 09.27174 02 03 16.84 -39 23 01.9                      719
    CJ99T010  C1999 10 09.28916 02 03 16.02 -39 23 14.3                      719
    CJ99T010  C1999 10 09.56846 02 03 03.26 -39 25 40.4          16.9 T      423
    CJ99T010  C1999 10 09.59716 02 03 02.06 -39 25 54.5          16.2 T      423
    CJ99T010  C1999 10 09.62379 02 03 00.86 -39 26 12.0          16.2 T      423
    CJ99T010  C1999 10 09.63444 02 03 00.36 -39 26 16.1          16.4 T      428
    CJ99T010  C1999 10 09.67416 02 02 58.54 -39 26 37.2          18.3 N      428
    CJ99T010  C1999 10 09.74686 02 02 55.17 -39 27 15.7          17.9 N      428
    CJ99T010  C1999 10 09.75152 02 02 54.99 -39 27 18.9          18.5 N      428
    CJ99T010  C1999 10 10.11201 02 02 38.79 -39 30 30.3          17.6 T      859
    CJ99T010  C1999 10 10.11530 02 02 38.63 -39 30 31.9          17.7 T      859
    CJ99T010  C1999 10 10.11911 02 02 38.44 -39 30 33.8          17.7 T      859
    CJ99T010  C1999 10 10.12194 02 02 38.30 -39 30 35.6          17.5 T      859
    CJ99T010  C1999 10 10.58554 02 02 17.00 -39 34 42.5          17.9 N      428
    CJ99T010  C1999 10 10.59009 02 02 16.85 -39 34 44.8          17.6 N      428
    CJ99T010  C1999 10 10.59531 02 02 16.58 -39 34 47.4          17.7 N      428
    CJ99T010  C1999 10 11.43772 02 01 37.76 -39 42 08.2          15.7 T      467
    CJ99T010  C1999 10 11.44068 02 01 37.81 -39 42 10.0          15.6 T      467
    CJ99T010  C1999 10 11.45107 02 01 37.16 -39 42 14.6                      467
    CJ99T010  C1999 10 11.47404 02 01 36.13 -39 42 26.9          15.6 T      467
    CJ99T010  C1999 10 11.47551 02 01 36.08 -39 42 27.3          15.7 T      467
    CJ99T010  C1999 10 11.47700 02 01 36.05 -39 42 28.4          15.6 T      467

Observer details:
413 Siding Spring.  Observer M. Hartley.  Measurer R. H. McNaught.  1.2-m
    U.K. Schmidt.
423 North Ryde.  Observer S. G. McAndrew.  0.20-m f/4 hyperbolic astrograph
    + CCD.
428 Reedy Creek.  Observer J. Broughton.  0.25-m f/6.3 Schmidt-Cassegrain
    + CCD.
467 Auckland Observatory.  Observers I. P. Griffin, R. Greatrex.
    0.5-m reflector + CCD.
719 Etscorn Observatory.  Observer D. A. Klinglesmith III.  0.355-m
    Schmidt-Cassegrain + CCD.
859 Wykrota Observatory-CEAMIG.  Observer C. Jacques.  0.3-m f/3.3
    Schmidt-Cassegrain + CCD.

Orbital elements:
    C/1999 T1 (McNaught-Hartley)
T 2000 Dec.  9.634 TT                                   Marsden
q   1.15380              (2000.0)            P               Q
                   Peri.  345.173       -0.967727       -0.250241
                   Node   181.735       +0.117502       -0.552427
e   1.0            Incl.   79.094       -0.222929       +0.795112
From 22 observations 1999 Oct. 7-11.

Ephemeris:
    C/1999 T1 (McNaught-Hartley)
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase   m1    m2
1999 10 09    02 03.48   -39 20.5    4.608    5.329   132.1     8.0  17.6
1999 10 19    01 55.53   -40 43.1    4.548    5.236   129.3     8.5  17.5
1999 10 29    01 46.91   -41 47.9    4.511    5.142   124.7     9.1  17.4
1999 11 08    01 38.15   -42 32.5    4.495    5.047   118.8     9.9  17.3
1999 11 18    01 29.82   -42 56.0    4.496    4.951   112.0    10.7  17.2
1999 11 28    01 22.46   -42 59.3    4.510    4.855   104.7    11.3  17.1
1999 12 08    01 16.49   -42 44.4    4.532    4.759    97.3    11.9  17.1
1999 12 18    01 12.20   -42 14.3    4.559    4.661    89.8    12.2  17.0
1999 12 28    01 09.75   -41 32.0    4.585    4.563    82.5    12.3  16.9
2000 01 07    01 09.17   -40 40.8    4.607    4.464    75.5    12.3  16.8
2000 01 17    01 10.41   -39 43.4    4.621    4.365    68.9    12.1  16.7
2000 01 27    01 13.36   -38 42.4    4.625    4.265    62.7    11.8  16.6

Brian G. Marsden             (C) Copyright 1999 MPC           M.P.E.C. 1999-T42

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