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IAUC 7067: C/1998 X1

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                                                  Circular No. 7067
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/iau/cbat.html
Phone 617-495-7244/7440/7444 (for emergency use only)


COMET C/1998 X1 (ODAS)
     The Observatoire de la Cote d'Azur-Deutsches Zentrum fur Luft und
Raumfahrt Asteroid Survey (ODAS) reports the discovery of a comet.

     1998 UT             R.A. (2000) Decl.        m1    Observer
     Dec. 15.17384    9 59 03.68   +13 54 35.1   18.3   Maury
          15.21959    9 59 04.53   +13 54 30.4   18.3     "
          16.04458    9 59 20.39   +13 53 16.7          Tichy
          16.07227    9 59 20.93   +13 53 13.1            "
          16.08374    9 59 21.05   +13 53 12.6          Sarounova
          16.13874    9 59 22.04   +13 53 08.5   18.9   Maury
          16.16045    9 59 22.37   +13 53 05.9   19.1     "
          16.17472    9 59 22.70   +13 53 06.4   19.4   Colas
          16.26022    9 59 24.10   +13 52 59.1   19.1     "
          16.98021    9 59 36.79   +13 51 58.9   18.9   Stoss
          17.18946    9 59 39.85   +13 51 43.8          Tichy
          17.20978    9 59 40.26   +13 51 42.5            "
          17.21033    9 59 40.24   +13 51 43.2   18.6   Colas
          17.26252    9 59 41.03   +13 51 39.2   19.4     "

A. Maury, D. Albanese, G. Hahn and M. Hoffmann (Caussols).  0.90-m Schmidt.
   Dec. 15: 1' tail in p.a. 300 deg.  Dec. 16: image diffuse.
M. Tichy and Z. Moravec (Klet).  0.57-m f/5.2 reflector.  Dec. 17: image
   diffuse; 10" tail in p.a. 291 deg.
L. Sarounova (Ondrejov).  0.65-m f/3.6 reflector.  Small, faint coma;
   probable faint and wide tail.
F. Colas and J. Lecacheux (Pic du Midi).  1.05-m f/6 reflector.
R. Stoss, S. Kluegl and P. Geffert (Heppenheim).  0.45-m f/4.4 reflector.

     The orbit of this comet is extremely indeterminate, but the following
parabolic elements should provide a useful early ephemeris.  The comet
is probably a short-period one.

     T = 1998 Aug. 19.081 TT          Peri. =  63.239
                                      Node  =   7.550   2000.0
     q = 1.87795 AU                   Incl. =   1.261

1998/99     R. A. (2000) Decl.     Delta      r    Elong. Phase      m1
Dec. 18     9 59.87    +13 50.8    1.760    2.393  118.6   21.2     18.0
     23    10 00.71    +13 47.1    1.744    2.430  123.5   19.7     18.1
     28    10 00.79    +13 47.3    1.731    2.467  128.6   18.2     18.1
Jan.  2    10 00.16    +13 51.0    1.722    2.505  133.8   16.4     18.2

                      (C) Copyright 1998 CBAT
1998 December 17               (7067)              Brian G. Marsden

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