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IAU Minor Planet Center

Minor Planet Center

MPEC 2004-D25 : COMET C/2004 C1 (LARSEN)

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M.P.E.C. 2004-D25                                Issued 2004 Feb. 21, 00:23 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.

         Supported in part by the Steven and Michele Kirsch Foundation
             Prepared using the Tamkin Foundation Computer Network

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

                           COMET C/2004 C1 (LARSEN)

Observations:
    CK04C010  C2004 02 13.93887 10 16 10.11 +09 51 57.2                 ED025213
    CK04C010  C2004 02 13.94334 10 16 10.02 +09 51 59.7                 ED025213
    CK04C010  C2004 02 13.94850 10 16 10.04 +09 52 03.2          19.2 N ED025176
    CK04C010  C2004 02 13.95003 10 16 09.89 +09 52 03.9                 ED025213
    CK04C010  C2004 02 13.95544 10 16 09.87 +09 52 05.6          19.3 N ED025176
    CK04C010  C2004 02 13.96238 10 16 09.70 +09 52 08.1          19.0 N ED025176
    CK04C010  C2004 02 13.96945 10 16 09.53 +09 52 10.7          18.8 N ED025176
    CK04C010  C2004 02 14.39653 10 15 59.02 +09 55 01.9          19.5 T ED025673
    CK04C010  C2004 02 14.40000 10 15 58.92 +09 55 03.4                 ED025673
    CK04C010  C2004 02 14.40486 10 15 58.78 +09 55 05.4                 ED025673
    CK04C010  C2004 02 14.41123 10 15 58.62 +09 55 07.9                 ED025673
    CK04C010  C2004 02 15.10455 10 15 41.37 +09 59 43.9          18.5 N ED025204
    CK04C010  C2004 02 15.11541 10 15 41.11 +09 59 47.9          18.7 N ED025204
    CK04C010  C2004 02 15.70137 10 15 26.56 +10 03 42.8          19.2 T ED025360
    CK04C010  C2004 02 15.70564 10 15 26.45 +10 03 44.6                 ED025360
    CK04C010  C2004 02 15.70959 10 15 26.35 +10 03 45.8                 ED025360
    CK04C010  C2004 02 17.93624 10 14 30.89 +10 18 36.9          19.6 N ED025493
    CK04C010  C2004 02 17.94245 10 14 30.74 +10 18 39.4          19.7 N ED025493
    CK04C010  C2004 02 17.94876 10 14 30.39 +10 18 41.1                 ED025213
    CK04C010  C2004 02 17.95031 10 14 30.34 +10 18 41.5                 ED025213
    CK04C010  C2004 02 17.95179 10 14 30.27 +10 18 41.8                 ED025213
    CK04C010  C2004 02 17.95457 10 14 30.20 +10 18 43.0                 ED025213
    CK04C010  C2004 02 17.97317 10 14 29.89 +10 18 50.1                 ED025246
    CK04C010  C2004 02 17.97400 10 14 29.84 +10 18 50.9                 ED025246
    CK04C010  C2004 02 17.97522 10 14 29.82 +10 18 51.4                 ED025246
    CK04C010  C2004 02 17.97722 10 14 29.81 +10 18 52.6                 ED025246
    CK04C010  C2004 02 17.97822 10 14 29.74 +10 18 52.6                 ED025246
    CK04C010  C2004 02 18.59542 10 14 14.35 +10 23 00.5          19.2 T ED025360
    CK04C010  C2004 02 18.60034 10 14 14.18 +10 23 02.8                 ED025360
    CK04C010  C2004 02 18.60554 10 14 14.07 +10 23 04.9                 ED025360
    CK04C010  C2004 02 19.31770 10 13 55.95 +10 27 47.9          19.7 N ED025850
    CK04C010  C2004 02 19.32742 10 13 55.79 +10 27 54.2          20.0 N ED025850
    CK04C010  C2004 02 19.34270 10 13 55.44 +10 27 58.6          19.1 N ED025850
    CK04C010  C2004 02 19.36285 10 13 55.07 +10 28 12.5          20.1 N ED025850

Observer details:
176 Observatori Astronomic de Consell.  Observers A. Lopez, R. Pacheco,
    J. Forteza.  0.41-m f/4 reflector + CCD.
204 Schiaparelli Observatory.  Observer L. Buzzi.  0.60-m f/4.64 Newtonian
    + CCD.
213 Observatorio Montcabre.  Observer R. Naves.  Measurer M. Campas.  0.30-m
    f/5.5 Schmidt-Cassegrain + CCD.
246 Klet Observatory-KLENOT.  Observers M. Tichy, M. Kocer, J. Ticha.  1.06-m
    KLENOT Telescope + CCD.
360 Kuma Kogen.  Observer A. Nakamura.  0.60-m f/5.8 Ritchey-Chretien + CCD.
493 Calar Alto.  Observers M. Buchmann, M. Busch, F. Hormuth.  1.52-m
    reflector + CCD.
673 Table Mountain Observatory, Wrightwood.  Observer J. Young.  0.6-m
    reflector + CCD.
850 Cordell-Lorenz Observatory, Sewanee.  Observers D. T. Durig, H. M. Perry.
    0.30-m f/5.86 Schmidt-Cassegrain + CCD.

Orbital elements:
    C/2004 C1 (Larsen)
T 2004 Nov. 23.658 TT                                   MPC
q   7.95375              (2000.0)            P               Q
                   Peri.   16.640       -0.848862       +0.227356
                   Node   151.452       +0.294163       -0.546920
e   1.0            Incl.   86.973       +0.439205       +0.805722
From 44 observations 2004 Feb. 12-19.

Ephemeris:
    C/2004 C1 (Larsen)
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase   m1    m2
2004 02 15    10 15.73   +09 59.0    7.156    8.138   173.3     0.8        20.0
2004 02 25    10 11.55   +11 05.9    7.139    8.125   175.2     0.6        19.9
2004 03 06    10 07.41   +12 12.0    7.156    8.113   163.8     2.0        20.1
2004 03 16    10 03.53   +13 15.9    7.205    8.101   152.6     3.2        20.1
2004 03 26    10 00.10   +14 15.9    7.286    8.090   141.5     4.4        20.2
2004 04 05    09 57.27   +15 10.9    7.392    8.079   130.6     5.4        20.3
2004 04 15    09 55.17   +16 00.3    7.519    8.069   120.1     6.2        20.4
2004 04 25    09 53.85   +16 43.6    7.663    8.059   109.8     6.7        20.5
2004 05 05    09 53.37   +17 20.9    7.817    8.049    99.7     7.1        20.5
2004 05 15    09 53.70   +17 52.5    7.976    8.040    90.0     7.2        20.6

Brian G. Marsden             (C) Copyright 2004 MPC           M.P.E.C. 2004-D25

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