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IAUC 7858: P/2002 CW_134; C/2002 C1

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                                                  Circular No. 7858
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
URL http://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)


COMET P/2002 CW_134 (LINEAR)
     An object reported as asteroidal by LINEAR (discovery
observation below), given the designation 2002 CW_134 on MPS 50314,
and later placed on the NEO Confirmation Page, has been found to
show cometary activity:  Mar. 19.0 UT, diffuse with coma diameter
13" (M. Tichy and M. Kocer, Klet, 1.06-m reflector); Mar. 23.0,
diffuse, faint coma extended about 30" in p.a. 330 deg (G. Masi and
F. Mallia, Campo Catino, Italy, 0.8-m reflector).

     2002 UT             R.A. (2000) Decl.        m2
     Feb.  7.47271   12 52 46.90   - 5 33 17.2   20.1

Astrometry and the following orbital elements appear on MPEC
2002-F49:

     T = 2002 Feb. 28.8798 TT         Peri. = 190.0804
     e = 0.489613                     Node  = 348.3172  2000.0
     q = 1.839617 AU                  Incl. =  15.2272
       a =  3.604353 AU    n = 0.1440334    P =   6.843 years


COMET C/2002 C1 (IKEYA-ZHANG)
     Ephemeris extension to IAUC 7852 (elements MPEC 2002-F21):

2002 TT     R. A. (2000) Decl.   Delta     r    Elong. Phase    m1
Mar. 27     1 19.83   +30 00.3   0.674   0.542   30.7  109.8    3.5
     29     1 15.26   +32 43.0   0.643   0.560   31.4  112.0    3.5
     31     1 09.42   +35 26.0   0.613   0.582   32.3  113.4    3.6
Apr.  2     1 02.23   +38 08.8   0.586   0.606   33.6  114.0    3.7
      4     0 53.59   +40 50.7   0.561   0.632   35.3  113.8    3.8
      6     0 43.37   +43 31.2   0.538   0.660   37.4  112.9    3.8
      8     0 31.37   +46 09.5   0.517   0.689   39.8  111.5    3.9
     10     0 17.36   +48 44.4   0.498   0.720   42.6  109.4    4.1
     12     0 01.03   +51 14.4   0.480   0.751   45.8  107.0    4.2
     14    23 42.03   +53 37.3   0.464   0.783   49.2  104.1    4.3
     16    23 19.97   +55 49.9   0.450   0.816   53.0  100.9    4.4

     Visual m_1 and tail-length estimates: Mar. 7.79 UT, 4.7, 3 deg
(B. H. Granslo, Movatn, Oslo, Norway, 7x50 binoculars); 10.78, 4.4,
5 deg (M. V. Zanotta, Santa Caterina Valfurva, Italy, 7x42
binoculars); 15.13, 3.7, -- (C. S. Morris, Fillmore, CA, naked eye);
19.80, 3.2, 5 deg (R. J. Bouma, Groningen, The Netherlands, 7x50
binoculars); 21.83, 3.2, 3 deg (J. J. Gonzalez, Asturias, Spain,
7x50 binoculars).

                      (C) Copyright 2002 CBAT
2002 March 23                  (7858)            Daniel W. E. Green

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