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IAUC 6677: C/1997 L1

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                                                  Circular No. 6677
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)
BMARSDEN@CFA.HARVARD.EDU or DGREEN@CFA.HARVARD.EDU (science)
URL http://cfa-www.harvard.edu/cfa/ps/cbat.html
Phone 617-495-7244/7440/7444 (for emergency use only)


COMET C/1997 L1
     On June 5, J. Zhu, Beijing Astronomical Observatory, reported
observations of five new objects detected on June 3 and 4 in the course
of the BAO Schmidt CCD Asteroid Program at Xinglong.  While observing some
of these objects on June 8, D. D. Balam, Victoria, noted that one was
clearly cometary, something that was confirmed by observers in Europe.
CCD precise positions:

     1997 UT             R.A. (2000) Decl.        m1    Observer
     June  3.67351   15 31 55.45   - 6 30 17.3          Zhu
           3.68338   15 31 55.21   - 6 30 10.0            "
           3.69281   15 31 54.85   - 6 30 04.9   16.7     "
           4.68358   15 31 21.55   - 6 20 40.0   17.1     "
           4.69367   15 31 21.18   - 6 20 35.2            "
           4.70343   15 31 20.81   - 6 20 29.3            "
           8.36119   15 29 21.84   - 5 46 40.9   16.5   Balam
           8.37000   15 29 21.56   - 5 46 35.8   16.5     "
           8.85532   15 29 06.37   - 5 42 14.4          Vagnozzi
           8.88558   15 29 05.39   - 5 41 58.1   17.8   Ticha
           8.89414   15 29 05.13   - 5 41 52.1            "
           8.89819   15 29 05.02   - 5 41 52.1          Vagnozzi

J. Zhu, Y. J. Chen and X. Y. Li (Xinglong).  0.6-m Schmidt.  Measurers
   C. M. Ma, J. Zhu and X. Y. Li.  Nothing reported about appearance.
D. D. Balam (Dominion Astrophysical Observatory).  1.8-m reflector.
   Object diffuse, tail 1' long in p.a. 220 deg.
A. Vagnozzi (Stroncone).  0.5-m f/2.8 Ritchey-Chretien.  A longer exposure
   shows a tail 1'.43 long in p.a. 205 deg.
J. Ticha and M. Tichy (Klet).  0.57-m f/5.2 reflector.  Slightly diffuse.

     Parabolic orbital elements by B. G. Marsden from the above observations:

     T = 1998 Jan. 24.330 TT          Peri. =  83.677
                                      Node  = 224.946   2000.0
     q = 2.39292 AU                   Incl. =  33.906

1997 TT     R. A. (2000) Decl.     Delta      r    Elong. Phase      m1
June  6    15 30.63    - 6 08.3    2.514    3.452  153.5    7.5     16.9
     11    15 28.01    - 5 23.1    2.510    3.416  148.3    9.0     16.8
     16    15 25.67    - 4 40.9    2.513    3.380  143.1   10.4     16.8
     21    15 23.66    - 4 02.0    2.521    3.345  137.9   11.8     16.8

                      (C) Copyright 1997 CBAT
1997 June 8                    (6677)              Brian G. Marsden

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