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IAUC 6986: 1998 P1; 1998dj

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                                                 Circular No. 6986
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 1998 P1
     D. A. J. Seargent, The Entrance, New South Wales, Australia,
reports the visual discovery by Peter Williams of Heathcote (near
Sydney) of a new comet.  Available observations:

     1998 UT             R.A. (2000) Decl.       m1    Observer
     Aug. 10.486     15 10.8       -64 59        9.5   Williams
          11.37962   15 02 11.23   -63 54 16.7         Garradd
          11.38046   15 02 10.74   -63 54 13.4           "
          11.38200   15 02 09.89   -63 54 06.7           "
          11.38350   15 02 08.99   -63 53 59.3           "
          11.385     15 02.3       -63 54        9.5   Williams
          11.38775   15 02 06.78   -63 53 42.1         Garradd
          11.46470   15 01 25.34   -63 48 12.9           "
          11.46569   15 01 24.81   -63 48 08.5           "
          11.47476   15 01 19.94   -63 47 29.6           "
          11.48030   15 01 17.02   -63 47 05.7           "
          11.48244   15 01 15.86   -63 46 56.5           "

P. Williams (Heathcote).  0.30-m f/6 reflector (72x).  Comet
  diffuse with a stellar central condensation of mag 13.
G. J. Garradd (Loomberah).  0.45-m f/5.4 reflector + CCD.  60-sec
  exposure shows 8' coma and 6' tail in p.a. 103 deg; m_2 =
  13.2-14.4.

     Additional visual m_1 estimates: Aug. 10.52 UT, 9.5 (Seargent,
25x100 binoculars; poor conditions, moonlight); 11.38, 9.5
(Williams, 20x80 binoculars; coma diameter 4'); 11.44, 9.0: (R. H.
McNaught, Siding Spring Observatory, 20x120 binoculars).


SUPERNOVA 1998dj in NGC 788
     M. Modjaz, T. Shefler, E. Halderson, J. Y. King, W. D. Li,
R. R. Treffers, and A. V. Filippenko, University of California at
Berkeley, report their discovery of an apparent supernova during
the course of the Lick Observatory Supernova Search (cf. IAUC 6627)
with the 0.8-m Katzman Automatic Imaging Telescope (KAIT).  SN
1998dj was found and confirmed on unfiltered CCD images obtained on
Aug. 8.5 (mag about 16.1) and 9.5 UT (mag about 16.0).  The object
is located at R.A. = 2h01m06s.92, Decl. = -6 49'04".8 (equinox
2000.0), which is about 7".1 east and 8".6 south of the nucleus of
NGC 788.  A KAIT image (limiting mag about 18.0) obtained on Jan.
25.2 does not show a star at the position of the new object.

                      (C) Copyright 1998 CBAT
1998 August 11                 (6986)            Daniel W. E. Green

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