MPEC 2002-H23 : COMET C/2002 C1 (IKEYA-ZHANG)

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M.P.E.C. 2002-H23                                Issued 2002 Apr. 20, 21:42 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://cfa-www.harvard.edu/iau/mpc.html  ISSN 1523-6714

                         COMET C/2002 C1 (IKEYA-ZHANG)

Observations:
    CK02C010  C2002 04 16.10518 23 18 45.28 +55 56 37.4                      057
    CK02C010  C2002 04 16.11347 23 18 39.39 +55 57 09.9                      057
    CK02C010  C2002 04 16.11998 23 18 34.51 +55 57 33.4                      057
    CK02C010  C2002 04 16.12613 23 18 30.02 +55 57 56.5                      057
    CK02C010  C2002 04 16.32323 23 16 07.40 +56 10 06.8          10.6 N      750
    CK02C010  C2002 04 16.32796 23 16 03.98 +56 10 24.5          10.4 N      750
    CK02C010  C2002 04 16.33133 23 16 01.58 +56 10 37.4          10.3 N      750
    CK02C010  C2002 04 16.33270 23 16 00.57 +56 10 42.4          10.0 N      750
    CK02C010  C2002 04 16.33409 23 15 59.59 +56 10 48.3          10.2 N      750
    CK02C010  C2002 04 16.33548 23 15 58.54 +56 10 53.3          10.2 N      750
    CK02C010  C2002 04 18.02064 22 54 13.16 +57 49 18.7           9.7 N      170
    CK02C010  C2002 04 18.09274 22 53 14.17 +57 53 19.6          10.7 N      204
    CK02C010  C2002 04 18.09746 22 53 10.29 +57 53 35.2          10.8 N      204
    CK02C010  C2002 04 18.10097 22 53 07.39 +57 53 46.9                      204
    CK02C010  C2002 04 18.10537 22 53 03.81 +57 54 01.3                      204
    CK02C010  C2002 04 20.08011 22 24 07.01 +59 30 27.5           9.7 N      213
    CK02C010  C2002 04 20.08233 22 24 04.82 +59 30 33.5           9.7 N      213
    CK02C010  C2002 04 20.08399 22 24 03.33 +59 30 38.0           9.6 N      170

Observer details:
057 Belgrade.  Observers Vl. Benishek, V. Protitch-Benishek.  0.16-m f/5
    Zeiss astrograph + CCD.
170 Observatorio de Begues.  Observer J. Manteca.  0.26-m Schmidt-Cassegrain
    + CCD.
204 Schiaparelli Observatory.  Observer A. Aletti.  Measurer L. Buzzi.
    0.60-m f/3.62 reflector + CCD.
213 Observatorio Montcabre.  Observer R. Naves N.  Measurer M. Campas.  0.25-m
    f/3.3 Schmidt-Cassegrain + CCD.
750 Hobbs Observatory, Fall Creek.  Observer R. Elliott.  0.3-m f/3.3 Schmidt-
    Cassegrain + CCD.

Orbital elements:
    C/2002 C1 (Ikeya-Zhang)
Epoch 2002 Mar. 27.0 TT = JDT 2452360.5
T 2002 Mar. 18.97932 TT                                 MPC
q   0.5070584            (2000.0)            P               Q
z  +0.0198122      Peri.   34.66495     -0.54911872     -0.69070312
 +/-0.0000123      Node    93.37037     +0.61961914     -0.71427583
e   0.9899541      Incl.   28.12161     +0.56083933     +0.11286826
From 664 observations 2002 Feb. 1-Apr. 20, mean residual 0".65.  Non-
   gravitational parameters A1 = +2.98 +/- 0.12, A2 = +1.0524 +/- 0.0923.

     The above orbital elements yield the year of the previous perihelion
passage as T = 1667.9 +/- 0.3 (gravitational 1 sigma).

Brian G. Marsden             (C) Copyright 2002 MPC           M.P.E.C. 2002-H23

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